12 Best Battery Backups for Modem and Router in 2027

For a battery backup for a modem and router with long runtime, my best overall pick is the GOLDENMATE 1000VA/800W Lithium UPS: its larger capacity and lithium battery design make it the strongest all-around choice in this lineup. The TalentCell 97.2Wh Mini UPS suits buyers who want a compact DC-focused backup, while the APC BX1500M is a better fit when the network shares backup power with more equipment. The main tradeoff is between a UPS with broader outlet support and a smaller DC unit that avoids powering a full AC conversion path. Actual runtime depends on your modem, router, and connected load, so capacity labels alone do not promise a set number of hours. Read on for the full breakdown and guidance on matching a backup to your outage pattern.

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Key Takeaways

• GOLDENMATE 1000VA/800W Lithium UPS leads for buyers seeking a larger general-purpose UPS with lithium battery technology, while its form and capacity may be more than a modem-and-router-only setup needs.
• TalentCell 97.2Wh and SKE DC20000 Plus are the lineup’s compact DC-oriented choices; check voltage, connector size, and polarity before choosing either for your equipment.
• The larger APC models, especially BE850G2 and BX1500M, make more sense when networking gear shares backup with a computer, NAS, or other electronics than when runtime for only a router is the goal.
• The GOLDENMATE 600VA/360W offers a smaller lithium UPS alternative to its 1000VA sibling, trading capacity headroom for a more focused setup.
• Several listed UPS models are designed around broad AC backup use; for long modem-and-router runtime, the connected wattage and real battery capacity matter more than the VA number alone.

Our Top Battery Backup For Modem And Router Long Runtime Picks

GOLDENMATE 1000VA/800W Lithium UPS Battery Backup & Surge Protector, White		Best for Long-Life, Multi-Device Backup	Capacity: 1000VA / 800W	Battery chemistry: Lithium iron phosphate	Battery average life: 10 years	VIEW ON AMAZON	See Our Full Breakdown
TalentCell Mini UPS Uninterrupted Power Supply 27000mAh 97.2Wh Lithium Ion Backup Battery Pack		Best DC Option for Router-Focused Runtime	Capacity: 27000mAh / 97.2Wh	Battery type: Lithium-ion	Output voltages: 12V / 9V / 5V	VIEW ON AMAZON	See Our Full Breakdown
APC BE600M1 UPS Battery Backup & Surge Protector for Computer, Router, NAS		Best Compact AC Backup	Capacity: 600VA / 330W	Listed runtime: 3 minutes	Outlets: 7	VIEW ON AMAZON	See Our Full Breakdown
Vertiv Liebert PowerUPS 200 PSA6E-1500LVT UPS Battery Backup 1500VA AVR		Best for Voltage Regulation and Expandable Setup	Capacity: 1500VA / 850W	Output voltage: 120V AC	Outlets: 8	VIEW ON AMAZON	See Our Full Breakdown
GOLDENMATE 600VA/360W Lithium UPS Battery Backup and Surge Protector		Best Compact LiFePO4 Pick	Capacity: 600VA / 360W	Battery type: LiFePO4	Battery capacity: 76.8Wh	VIEW ON AMAZON	See Our Full Breakdown
CyberPower ST425 Standby UPS Battery Backup and Surge Protector		Best for Brief Outages	Capacity: 425VA / 260W	Runtime: Approximately 1 minute	Outlets: 8	VIEW ON AMAZON	See Our Full Breakdown
APC Battery Backup 650VA/390W Uninterruptible Power Supply for PC, BE650G1		Best for Replaceable-Battery Ownership	Capacity: 650VA / 390W	Runtime: 3 minutes at 100W load	Outlets: 8: 4 battery backup and surge protection, 4 surge-only	VIEW ON AMAZON	See Our Full Breakdown
SKE DC20000 Plus Altair Mini DC UPS 20000mAh Battery Backup & Surge Protector for Router & Modem		Best for Long Router Runtime	Battery capacity: 20,000mAh	Runtime: Up to 7 hours	Output voltage: 5V / 9V / 12V	VIEW ON AMAZON	See Our Full Breakdown
APC BE850G2 UPS Battery Backup & Surge Protector for Computer, Router, NAS		Best for Mixed Home-Office Gear	Capacity: 850VA / 450W	Runtime: Description states up to 35 minutes at 100W; spec lists 2 minutes	Outlets: 9	VIEW ON AMAZON	See Our Full Breakdown
APC BX1500M UPS Battery Backup & Surge Protector for Computers and Electronics		Best for High-Capacity Setups	Capacity: 1500VA / 900W	Outlets: 10: 5 battery backup and 5 surge-only	Input/output voltage: 120V	VIEW ON AMAZON	See Our Full Breakdown
CyberPower ST625U Standby UPS Battery Backup and Surge Protector		Best for Compact, Short-Outage Coverage	Maximum power: 330 watts	Output wattage: 360 watts	Runtime: 2 minutes	VIEW ON AMAZON	See Our Full Breakdown
CyberPower SL950U Standby UPS Battery Backup and Surge Protector		Best Slim Pick for a Longer Short-Backup Window	Maximum power: 510 watts	Output wattage: 510 watts	Runtime: 8 minutes	VIEW ON AMAZON	See Our Full Breakdown

More Details on Our Top Picks

1. GOLDENMATE 1000VA/800W Lithium UPS Battery Backup & Surge Protector, White

   

   Best for Long-Life, Multi-Device Backup

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   For a modem and router setup that also needs to keep other network gear powered, the GOLDENMATE 1000VA/800W offers the largest listed power capacity in this group and eight outlets. Its LiFePO4 battery is rated for an average 10-year life, a useful advantage for buyers who want to replace batteries less often. The LCD also makes operating status easier to check than on the simpler GOLDENMATE 600VA model. The tradeoff is that its stated 30-minute runtime is not a long-outage guarantee, and the figure is not tied to a specific load, so a modem-router pair may run for a different length of time. Choose it for capacity and battery longevity, not a confirmed hours-long runtime; fan noise under heavy use may also bother a quiet workspace.

   Pros:

   • Eight outlets let one unit support a modem, router, and other network equipment.
   • LiFePO4 battery is specified with an average 10-year life.
   • LCD provides at-a-glance power and battery information.
   • 800W maximum output leaves more capacity for added equipment than the smaller GOLDENMATE 600VA.

   Cons:

   • Listed runtime is only 30 minutes, with no load specified for that figure.
   • Cooling fan noise may be noticeable during heavier operation.
   • The listed charge time is 10 hours.

   Best for: Home network owners who want one UPS for a modem, router, and several additional low-power devices, with a long-lived battery and status display.

   Not ideal for: Buyers who need verified, multi-hour runtime for an extended outage or who need a silent UPS near a sleeping area.

   • Capacity:1000VA / 800W
   • Battery chemistry:Lithium iron phosphate
   • Battery average life:10 years
   • Listed runtime:30 minutes
   • Outlets:8
   • Output voltage:120V
   • Battery charge time:10 hours
   • Form factor:Tower
   Our verdict

   “Choose this GOLDENMATE if you value eight outlets and long battery service life more than a proven, extended modem-and-router runtime.”

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2. TalentCell Mini UPS Uninterrupted Power Supply 27000mAh 97.2Wh Lithium Ion Backup Battery Pack

   

   Best DC Option for Router-Focused Runtime

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   The TalentCell Mini UPS is the most directly tailored choice here for low-voltage networking gear: its DC outputs can power compatible routers and modems without relying on a conventional AC outlet. Its stated 97.2Wh capacity gives buyers a clearer energy figure than the Vertiv Liebert PowerUPS 200, which lists no runtime duration. Multiple 12V, 9V, and 5V outputs also make this more adaptable to devices with different power requirements. The catch is compatibility: check each device’s voltage, connector, and power draw, and budget for an adapter if the included connection does not match. It cannot continuously power devices above 37W, so it is less suitable for a mixed setup with high-draw equipment than the GOLDENMATE 1000VA/800W. This is a targeted network backup pack, not a general-purpose UPS.

   Pros:

   • 97.2Wh capacity is specified for a compact DC battery pack.
   • 12V, 9V, and 5V outputs suit a range of low-voltage networking equipment.
   • Seven outlets and USB-A/USB-C outputs support multiple compatible devices.
   • Built-in protection covers short circuit, over-current, and overcharging.

   Cons:

   • Continuous power is limited to devices drawing no more than 37W.
   • Some devices may require separately purchased adapters.
   • DC connector and voltage compatibility must be checked for each modem and router.

   Best for: People who want a compact battery for a compatible 5V, 9V, or 12V modem or router and can verify connector and power requirements.

   Not ideal for: Households needing standard AC backup for computers or several household devices, or anyone whose network equipment draws more than 37W.

   • Capacity:27000mAh / 97.2Wh
   • Battery type:Lithium-ion
   • Output voltages:12V / 9V / 5V
   • Maximum output power:98W listed; continuous device limit 37W
   • Outlets:7
   • Dimensions:6.3 × 5.51 × 1.3 inches
   • Weight:700g
   • Connector:5.5 × 2.1mm DC barrel jack
   Our verdict

   “Pick the TalentCell for a compatible, low-power modem-router setup where DC output and a stated 97.2Wh capacity matter more than broad AC compatibility.”

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3. APC BE600M1 UPS Battery Backup & Surge Protector for Computer, Router, NAS

   

   Best Compact AC Backup

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   The APC BE600M1 is a compact way to keep a modem and router on familiar AC power, with seven outlets and a user-replaceable battery. That replaceability is a practical distinction from the GOLDENMATE 600VA, whose supplied details emphasize a long-lived LiFePO4 battery but do not list a replaceable-battery feature. For a long-runtime roundup, though, the APC’s listed three-minute runtime is a clear limitation: it may bridge a brief interruption, but it does not support a claim of extended outage coverage. The 330W capacity is ample for basic networking gear, while the USB-A port adds a charging option. I would favor this model when compact size, AC outlets, and future battery replacement matter more than runtime; the TalentCell is a more focused alternative for compatible DC-powered routers.

   Pros:

   • Seven outlets provide AC connections for networking equipment and other essentials.
   • User-replaceable battery can extend the UPS’s service life.
   • Compact, wall-mountable design can save desk or floor space.
   • USB-A port adds a convenient charging connection.

   Cons:

   • Listed runtime is three minutes, so it is not a long-runtime choice.
   • Replacement battery must be purchased separately.
   • 330W maximum output limits support for higher-power equipment.

   Best for: Apartment dwellers or home-office users who want a compact AC UPS for a modem and router, plus the option to replace its battery later.

   Not ideal for: People who need a modem and router to stay online through a prolonged outage; the listed runtime is only three minutes.

   • Capacity:600VA / 330W
   • Listed runtime:3 minutes
   • Outlets:7
   • USB connector:USB Type-A
   • Output voltage:120V
   • Battery charge time:10 hours
   • Dimensions:10.79 × 4.13 × 5.47 inches
   • Weight:7.5 pounds
   Our verdict

   “Choose the APC BE600M1 for compact AC backup and battery replaceability, but skip it if your priority is keeping internet service available through a long outage.”

   → See it on Amazon →

4. Vertiv Liebert PowerUPS 200 PSA6E-1500LVT UPS Battery Backup 1500VA AVR

   

   Best for Voltage Regulation and Expandable Setup

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   The Vertiv Liebert PowerUPS 200 is better suited to a network closet with several connected devices than to buyers shopping strictly for proven long runtime. Its 1500VA capacity, eight outlets, and automatic voltage regulation offer room for a modem, router, and additional equipment while helping manage voltage fluctuations. User-replaceable batteries also give it a maintenance path that the TalentCell DC pack does not provide in the same AC-UPS format. The key omission for this roundup is runtime: the listed data gives no duration, so I cannot rank it ahead of the GOLDENMATE 1000VA/800W on outage endurance. Its 850W maximum output is substantial, but higher capacity alone does not establish how long network gear will stay powered. Choose it for regulation and expandability, not a guaranteed runtime target.

   Pros:

   • 1500VA capacity and eight outlets accommodate a broader equipment setup.
   • Automatic voltage regulation helps address input-voltage fluctuations.
   • User-replaceable batteries support longer-term serviceability.
   • USB-C and USB-A ports add device-charging options.

   Cons:

   • No backup runtime duration is specified, making outage endurance difficult to judge.
   • 850W maximum output may not suit higher-demand equipment beyond its rating.
   • Replacement batteries are specified as Vertiv batteries.

   Best for: Home-office and small-network users who need AC backup for several devices, voltage regulation, and a user-replaceable battery.

   Not ideal for: Buyers comparing options primarily by confirmed runtime, since no runtime duration is provided in the product data.

   • Capacity:1500VA / 850W
   • Output voltage:120V AC
   • Outlets:8
   • Voltage regulation:Automatic voltage regulation
   • Battery:User-replaceable
   • Dimensions:15.75 × 5.71 × 7.68 inches
   • Warranty:3 years
   • Form factor:Compact
   Our verdict

   “Choose the Vertiv for voltage regulation and a larger AC-connected setup, but select a model with stated runtime data if outage duration is your main buying measure.”

   → See it on Amazon →

5. GOLDENMATE 600VA/360W Lithium UPS Battery Backup and Surge Protector

   

   Best Compact LiFePO4 Pick

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   The GOLDENMATE 600VA/360W brings a long-life LiFePO4 battery and a small footprint to a basic modem-and-router setup. Its 76.8Wh capacity is stated plainly, unlike the Vertiv Liebert PowerUPS 200 data, which provides no runtime figure. That energy rating still does not tell me how many hours a particular network setup will run, so buyers should not treat it as a runtime promise. Compared with the larger GOLDENMATE 1000VA/800W, this model gives up output capacity and has six outlets, but adds wireless charging and USB ports in a compact package. It makes sense for essentials and a tidy desk; for more connected equipment or greater AC capacity, the 1000VA model is the stronger fit. Neither listed spec set gives a specific modem-router runtime.

   Pros:

   • LiFePO4 battery is specified with a service life of over 10 years.
   • Compact 2.1kg design can be wall-mounted.
   • Wireless charging and USB-A/USB-C ports add charging flexibility.
   • 76.8Wh battery capacity is stated in the product data.

   Cons:

   • 76.8Wh capacity may be insufficient for extended outages, depending on connected load.
   • Six outlets and 360W output offer less room than the GOLDENMATE 1000VA/800W.
   • No modem-router runtime duration is provided.

   Best for: People with a compact home-network setup who value a LiFePO4 battery, wall-mountable size, and convenient phone charging.

   Not ideal for: Households seeking a quantified long outage runtime or needing to power many devices or higher-draw equipment.

   • Capacity:600VA / 360W
   • Battery type:LiFePO4
   • Battery capacity:76.8Wh
   • Battery voltage:25.6V
   • Outlets:6 surge-protected outlets
   • USB ports:1 Type-C and 1 Type-A
   • Wireless charging:15W
   • Dimensions and weight:280 × 116 × 112mm; 2.1kg
   Our verdict

   “Pick this compact GOLDENMATE for a small network and long-life battery, but choose the 1000VA version if you need more outlets and output capacity.”

   → See it on Amazon →

6. CyberPower ST425 Standby UPS Battery Backup and Surge Protector

   

   Best for Brief Outages

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   The CyberPower ST425 is a compact standby UPS for keeping a modem and router powered through a short interruption or giving you time to shut equipment down safely. Its 260W capacity and eight outlets offer more connection flexibility than the SKE DC20000 Plus, but the ST425 is a poor fit if your priority is sustained internet during an extended outage: the listed runtime is just one minute. That makes it better suited to momentary power dips than long-running backup. Its small footprint and surge protection help it fit a home-office setup, while the lead-acid battery may need replacement after several years. Compared with the APC BE650G1, it offers less listed power capacity and no runtime advantage, so I’d choose it only when compact AC outlets matter more than backup duration.

   Pros:

   • Compact form fits easily in a home office or entertainment setup
   • Eight outlets provide flexible connections for electronics
   • Combines battery backup with surge protection
   • Three-year warranty and connected equipment guarantee

   Cons:

   • Listed runtime of about one minute is unsuitable for extended outages
   • Lead-acid battery may need replacement after several years
   • Does not provide the long low-voltage runtime offered by the SKE DC20000 Plus

   Best for: People who want a compact AC UPS to bridge brief power interruptions for a modem and router.

   Not ideal for: Households seeking hours of connectivity during an outage; its listed runtime is about one minute.

   • Capacity:425VA / 260W
   • Runtime:Approximately 1 minute
   • Outlets:8
   • Output voltage:120V
   • Battery type:Lead acid
   • Battery average life:3 years
   • Form factor:Compact
   • Color:Black
   Our verdict

   “Choose the ST425 for compact surge protection and a brief power bridge, not for long modem-and-router runtime.”

   → See it on Amazon →

7. APC Battery Backup 650VA/390W Uninterruptible Power Supply for PC, BE650G1

   

   Best for Replaceable-Battery Ownership

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   The APC BE650G1 suits buyers who want a conventional AC UPS and the option to replace its battery rather than replace the whole unit. Its user-replaceable battery is a practical ownership advantage over the CyberPower ST425, although it does not solve the main limitation for this roundup: the listed runtime is only three minutes at a 100W load. A modem-and-router pair may draw less than that reference load, but the supplied information does not give a specific runtime at a networking-device load, so I would not treat it as an hours-long solution. Eight outlets let you connect several devices, with four reserved for battery backup. Compared with the SKE DC20000 Plus, the APC is more flexible for standard AC equipment but is much less tailored to extended router and modem operation.

   Pros:

   • User-replaceable battery can extend the UPS’s service life
   • Eight outlets, including four with battery backup
   • Wall-mountable design can suit home or office installations
   • Audible alarms and LED indicators provide operating status

   Cons:

   • Listed runtime is only three minutes at a 100W load
   • Replacement requires a separate RBC17 battery
   • 340-joule surge rating is limited compared with the needs of buyers seeking broader surge coverage

   Best for: Home-office owners who want an AC UPS with a replaceable battery and enough outlets for networking and computer equipment.

   Not ideal for: People whose main goal is maintaining internet for hours; the listed runtime is three minutes at a 100W load.

   • Capacity:650VA / 390W
   • Runtime:3 minutes at 100W load
   • Outlets:8: 4 battery backup and surge protection, 4 surge-only
   • Output voltage:120V
   • Battery:User-replaceable; replacement model RBC17
   • Dimensions:7.09 x 11.18 x 3.39 inches
   • Weight:13.6 pounds
   • Warranty:3 years
   Our verdict

   “Pick the BE650G1 if replaceable-battery AC backup matters more than keeping a modem and router online for a long outage.”

   → See it on Amazon →

8. SKE DC20000 Plus Altair Mini DC UPS 20000mAh Battery Backup & Surge Protector for Router & Modem

   

   Best for Long Router Runtime

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   For a roundup focused on long modem-and-router runtime, the SKE DC20000 Plus is the clearest fit: its listed runtime is up to 7 hours, unlike the minutes-long figures supplied for the CyberPower ST425 and APC BE650G1. Its 20,000mAh capacity and 5V, 9V, and 12V outputs are aimed at low-voltage networking gear, so buyers should check that their modem and router accept a supported output before choosing it. This focused design can keep internet equipment running without powering a full set of household electronics. It also weighs 0.65kg and includes USB and Type-C charging, making it more portable than the tower-style APC BE850G2. The tradeoff is equally clear: 20W maximum output rules out high-power devices, and actual runtime varies with the connected load.

   Pros:

   • Listed runtime of up to 7 hours targets extended networking backup
   • 20,000mAh capacity with 5V, 9V, and 12V outputs
   • Compact, portable design weighs 0.65kg
   • USB and Type-C charging and an LED battery indicator

   Cons:

   • 20W maximum output limits it to low-power devices
   • Runtime varies with the connected equipment and load
   • Charging time is not specified in the supplied product data

   Best for: People who want several hours of backup for compatible 5V, 9V, or 12V modem and router equipment.

   Not ideal for: Buyers needing backup for desktop computers, appliances, or networking gear that draws more than 20W or uses unsupported voltage.

   • Battery capacity:20,000mAh
   • Runtime:Up to 7 hours
   • Output voltage:5V / 9V / 12V
   • Maximum power:20W
   • Current:2A
   • Dimensions:4.2 x 8.1 x 1.3 inches
   • Weight:0.65kg
   • Color:Black
   Our verdict

   “Choose the SKE DC20000 Plus for the strongest stated long-runtime fit when your modem and router match its voltage and power limits.”

   → See it on Amazon →

9. APC BE850G2 UPS Battery Backup & Surge Protector for Computer, Router, NAS

   

   Best for Mixed Home-Office Gear

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   The APC BE850G2 makes more sense when a modem and router share backup duty with a NAS, computer, or other AC equipment. Its 850VA/450W capacity, nine outlets, and two USB charging ports cover a broader setup than the SKE DC20000 Plus, which is limited to low-voltage devices and 20W. The supplied description cites up to 35 minutes at 100W, while the spec list gives a two-minute runtime without a stated load; that inconsistency makes it hard to predict actual outage time. Either way, the provided data does not support treating it as a guaranteed multi-hour networking backup. The user-replaceable battery is a useful maintenance feature, but the separate replacement purchase and larger tower footprint make this a more substantial choice than a compact DC unit.

   Pros:

   • 450W capacity supports a wider mix of AC electronics than a DC mini UPS
   • Nine outlets and two USB charging ports
   • User-replaceable battery supports longer-term maintenance
   • LED indicators and alarms help communicate UPS status

   Cons:

   • Supplied runtime information conflicts: up to 35 minutes at 100W is stated, while the spec lists 2 minutes
   • Replacement battery is sold separately
   • Tower footprint may be awkward in a tight networking space

   Best for: People backing up a modem and router alongside a NAS or other AC home-office equipment who want multiple outlets and USB ports.

   Not ideal for: Buyers seeking a compact, networking-only unit with a clear multi-hour runtime; the runtime figures supplied are inconsistent and load-dependent.

   • Capacity:850VA / 450W
   • Runtime:Description states up to 35 minutes at 100W; spec lists 2 minutes
   • Outlets:9
   • USB ports:2
   • Output voltage:120V
   • Battery:User-replaceable
   • Dimensions:12.87 x 4.13 x 5.47 inches
   • Warranty:3 years
   Our verdict

   “Choose the BE850G2 for a mixed AC equipment setup, but verify expected runtime for your load before relying on it for long outages.”

   → See it on Amazon →

10. APC BX1500M UPS Battery Backup & Surge Protector for Computers and Electronics

    

    Best for High-Capacity Setups

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    The APC BX1500M is the high-capacity choice here, with 1500VA/900W output and ten outlets split between battery-backed and surge-only connections. That reserve suits a home office with several devices, but more wattage does not automatically mean longer modem-and-router runtime: the supplied product data gives no runtime figure. I’d rank it below the SKE DC20000 Plus for buyers whose main aim is hours of internet access, since the SKE lists up to seven hours while the APC’s duration is unspecified. The BX1500M instead stands out for automatic voltage regulation and an LCD that reports system status. Its replaceable battery is another maintenance advantage, though the replacement is sold separately, and the 900W limit excludes high-demand appliances such as heaters and refrigerators.

    Pros:

    • 1500VA/900W capacity supports a larger electronics setup than the smaller UPS options here
    • Automatic voltage regulation helps maintain stable voltage
    • LCD display provides real-time system information
    • Replaceable battery can extend the unit’s service life

    Cons:

    • No runtime figure is supplied, so long-outage performance is difficult to judge
    • Replacement battery APCRBC124 is sold separately
    • 900W limit excludes high-demand appliances such as refrigerators and heaters

    Best for: Home-office users with several connected electronics who want high UPS capacity, voltage regulation, and an LCD status display.

    Not ideal for: Buyers choosing solely for long modem-and-router runtime; no runtime figure is provided, and the unit is not for high-demand appliances.

    • Capacity:1500VA / 900W
    • Outlets:10: 5 battery backup and 5 surge-only
    • Input/output voltage:120V
    • Voltage regulation:Automatic Voltage Regulation
    • Display:LCD
    • Battery:Replaceable; APCRBC124 sold separately
    Our verdict

    “Pick the BX1500M for higher-capacity home-office backup and voltage regulation, not for a proven long-runtime modem-and-router solution.”

    → See it on Amazon →

11. CyberPower ST625U Standby UPS Battery Backup and Surge Protector

    

    Best for Compact, Short-Outage Coverage

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    The CyberPower ST625U suits a modem and router setup where the goal is to ride through brief interruptions, not sustain a long outage. Its listed 2-minute runtime is the key limitation for this roundup: it may provide a short window for a quick power return or controlled shutdown, but it falls well behind the SL950U’s listed 8 minutes and is not a long-runtime choice. Eight outlets give room for other low-power equipment, while two USB charging ports add everyday convenience. The compact, 5-pound design is easier to place than larger UPS units such as the APC BX1500M, though that larger model is a more suitable direction for buyers prioritizing greater backup capacity. I’d choose the ST625U for compact surge protection and brief backup, not for staying online through extended outages.

    Pros:

    • Eight outlets accommodate a modem, router, and additional electronics.
    • Two USB charging ports provide charging access without using an outlet.
    • Compact 5-pound form is easier to place than larger-capacity UPS units.
    • Three-year warranty and connected equipment guarantee are listed.

    Cons:

    • Listed 2-minute runtime is a poor fit for long-duration modem and router backup.
    • 120V operation limits suitability outside compatible North American power systems.
    • Battery capacity can diminish with age, reducing useful backup time.

    Best for: Home users with a modem and router who want compact surge protection and a brief bridge through short power interruptions.

    Not ideal for: Remote workers or households that need internet to remain available during longer outages; the listed 2-minute runtime is too short for that goal.

    • Maximum power:330 watts
    • Output wattage:360 watts
    • Runtime:2 minutes
    • Outlets:8
    • USB charging ports:2
    • Input/output voltage:120 volts
    • Dimensions:3.2 x 9.8 x 5.8 inches
    • Weight:5 pounds
    Our verdict

    “Choose the ST625U for compact surge protection and brief outage coverage, but skip it if keeping internet online for a meaningful stretch is the priority.”

    → See it on Amazon →

12. CyberPower SL950U Standby UPS Battery Backup and Surge Protector

    

    Best Slim Pick for a Longer Short-Backup Window

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    The CyberPower SL950U is the more capable of these two CyberPower picks for keeping a modem and router powered through a brief outage. Its listed 8-minute runtime gives it a clear advantage over the ST625U’s 2 minutes, though it still falls short of what buyers seeking long outage coverage may need. The 510-watt output and eight outlets also leave more headroom for connected equipment than the ST625U’s listed 330-watt maximum power. A slim, wall-mountable design can make placement easier in a crowded home office, and UL 1778 certification is listed. The tradeoff is that this remains a standby UPS with a finite runtime and a battery expected to need replacement over time. I’d favor it over the ST625U for extra backup time and installation flexibility, not as a substitute for a longer-runtime battery system.

    Pros:

    • Listed 8-minute runtime exceeds the ST625U’s 2-minute figure.
    • Slim profile and keyhole slots support flexible, wall-mounted placement.
    • Eight outlets and 510 watts of output provide room for multiple devices.
    • UL 1778, ENERGY STAR, and RoHS certifications are listed.

    Cons:

    • Eight minutes remains a short backup window for prolonged outages.
    • Battery life is listed at around three years, so replacement may be needed.
    • 120V North American plug and input limit its use with other power standards.

    Best for: Home-office users who want a slim, wall-mountable UPS for a modem and router, with more short-outage runtime than the ST625U provides.

    Not ideal for: Households that need broadband to stay available through extended power cuts; its listed 8-minute runtime is still limited.

    • Maximum power:510 watts
    • Output wattage:510 watts
    • Runtime:8 minutes
    • Outlets:8
    • Input voltage:120 volts
    • Frequency range:60 Hz
    • Power plug:Type B, 3-pin North American
    • Safety certifications:UL 1778, ENERGY STAR, RoHS
    • Warranty:3 years
    Our verdict

    “Pick the SL950U over the ST625U when you want a slim installation and a longer brief-backup window, but choose another solution for extended internet uptime.”

    → See it on Amazon →

How We Picked

I ranked these products around the specific goal of keeping a modem and router online for as long as practical. The main factors were battery capacity where stated, power output and connection type, suitability for networking equipment, room to support other devices, and how much setup knowledge the buyer needs. I also weighed the tradeoff between dedicated DC mini UPS units and conventional AC UPS designs: DC units can be a focused fit for compatible network gear, while AC models offer broader outlet flexibility.

The ranking favors options that offer a credible balance of runtime potential and practical use, not simply the highest VA figure. Larger UPS units are placed higher when they provide useful capacity headroom, but they are not automatic winners for a router-only setup because load, conversion losses, battery condition, and device compatibility affect runtime. Compact units rank well for buyers prioritizing a small footprint and direct DC power, while models with less clearly differentiated advantages sit lower. No runtime guarantee is inferred from capacity labels; buyers should check the actual load and manufacturer specifications for their configuration.

Factors to Consider When Choosing Battery Backup For Modem And Router Long Runtime

Choosing a long-runtime backup is less about buying the biggest number on the box and more about matching the power path to your network gear. These factors can prevent compatibility problems and help set a realistic expectation for how long your connection will stay up.

Estimate the load before comparing capacity

Find the wattage of the modem, router, and any other device you plan to keep online, then add those loads together. If a label lists volts and amps rather than watts, multiply them for a rough maximum-power estimate, while recognizing that normal draw may be lower. A lightly loaded UPS can run longer than the same unit supporting several devices, so advertised VA capacity is not a runtime promise. Avoid adding a desktop computer just because the UPS has spare outlets; that can sharply reduce network backup time. When runtime is the priority, reserve backup power for the equipment that restores your connection.

Match DC voltage, connector, and polarity

Mini DC UPS units can avoid the extra AC conversion stage, but only if their output matches the modem or router. Check voltage, connector dimensions, polarity, and required current against each device’s label or manual before buying. A plug that physically fits can still provide the wrong voltage or polarity, so do not treat connector shape as proof of compatibility. Some homes have a modem and router with different power requirements, which can require separate outputs or a different backup approach. If you cannot confirm the specifications, an AC UPS is often simpler to connect, though it may be less compact.

Think about the whole power path

A backup can keep your own modem and router powered, but it cannot keep an internet connection alive if the provider’s local network equipment loses power. Cable, fiber, and fixed-wireless services may depend on neighborhood or building equipment outside your home. Ask your provider whether its network has backup power and how outages affect service in your area. This matters most when you are paying for a large battery chiefly to preserve internet access during extended grid failures. A modest UPS may be enough for brief interruptions if the provider’s network remains online.

Choose the battery format around your outage pattern

Short flickers call for fast, automatic backup and surge protection, while long outages make stored energy and the ability to recharge more relevant. Conventional UPS units suit people who also want AC outlets for a NAS or computer, but those added loads use up runtime. Compact DC systems target network equipment and take less space, yet their output options and capacity can be more limited. Check how the unit signals low battery and whether it supports safe shutdown if you plan to connect computing equipment. For repeated multi-hour outages, compare the battery’s usable energy and recharge arrangements rather than relying on a broad UPS class label.

Leave headroom and plan for battery aging

Buying exactly to the estimated load leaves little room for a future router, extra access point, or brief power spikes. Some capacity headroom can make the setup more flexible, but an oversized unit may cost space and money without extending runtime much if the load stays small. Batteries also lose capacity with age and operating conditions, so a unit that barely meets today’s target may fall short later. Check the manufacturer’s battery replacement or service guidance, especially for a UPS that will protect equipment for years. For a sealed or non-serviceable mini unit, factor eventual replacement into the long-term choice.

Decide whether extra outlets are useful or wasteful

Outlet count matters only if the backup outlets support the devices you genuinely need during an outage. Some UPS designs include surge-only outlets that do not draw from the battery, so check the outlet layout before connecting the modem and router. A larger model can be a good purchase when it protects a NAS or work computer as well, but those additions compete directly with networking runtime. Do not confuse the number of sockets with the amount of battery energy available. For a network-only setup, a smaller focused unit may be easier to place and manage.

Frequently Asked Questions

How can I estimate how long a backup will run my modem and router?

Start with the combined wattage of both devices, then compare that load with the backup’s stated battery energy or manufacturer runtime chart. Runtime estimates vary because usable energy is lower than the battery’s nominal capacity and AC conversion adds losses. Router activity, attached phones or storage, and the modem’s operating draw can also change consumption. If a manufacturer publishes a runtime table, use the row closest to your real load rather than extrapolating from the maximum rating. Treat any estimate as approximate, especially as the battery ages.

Can I power a modem and router from the same mini DC UPS?

Only if the mini UPS has suitable outputs for both devices and can supply their combined current. Check each device’s voltage, plug size, polarity, and power requirement; a shared voltage alone is not enough to confirm compatibility. Some mini units provide multiple voltage outputs, but that does not mean every output can be used at once or at full capacity. Read the output limits and connection instructions before splitting power. If either device falls outside those specifications, choose a compatible AC UPS or another backup arrangement.

Will a UPS keep my internet working during a neighborhood outage?

It can keep your modem and router powered, but it cannot supply power to your provider’s equipment outside your home. Whether the connection remains active depends on backup systems at the cable node, fiber cabinet, building equipment, or wireless site serving you. Ask your provider about local backup coverage and expected outage behavior. If provider infrastructure has no backup, a larger home UPS may preserve Wi-Fi locally without preserving internet access. That distinction can change how much battery capacity is worth buying.

Should I choose a DC mini UPS or a standard AC UPS for longer runtime?

A DC mini UPS can be a good fit when its outputs match your networking equipment, since it can power the devices without the same AC conversion path used by a standard UPS. A conventional AC UPS is easier to use with varied equipment and may suit a setup that also includes a NAS or computer. Neither format guarantees longer runtime on its own; battery energy, load, conversion losses, and device compatibility all matter. For a modem-and-router-only setup, compare usable capacity and output specifications rather than judging by form factor. Choose AC when flexibility matters more than a compact, network-focused connection.

Can I connect a computer to the same UPS without losing much router runtime?

Usually, adding a computer reduces the time available to the modem and router because all connected battery-backed devices share the stored energy. A desktop under load can draw far more power than networking equipment, so even a short session may have a large effect. If keeping internet access is the priority, connect only the modem and router to battery-backed outlets and use surge-only outlets for equipment that does not need outage power. If you need both computer and network backup, size the UPS around their combined draw and accept a shorter runtime. Separate backups can also let you protect each load according to its own needs.

Conclusion

For the broadest balance in this roundup, I recommend the GOLDENMATE 1000VA/800W Lithium UPS as best overall, with its larger capacity and lithium battery design; choose it when you want a conventional UPS that can support more than network gear. The TalentCell 97.2Wh is my best value-style pick for buyers who want a compact DC backup and can verify device compatibility, while the APC BX1500M is the best premium fit for a network setup that also needs backup for additional electronics. For beginners, the APC BE600M1 is a straightforward AC UPS choice, though it is not the most specialized option for long runtime. If you want a smaller lithium UPS, look at the GOLDENMATE 600VA/360W; if direct DC output and a compact footprint matter most, compare the TalentCell and SKE models closely. Choose by your equipment’s voltage and wattage first, then size capacity around the outage duration you actually need.