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CyberPower SL700U Standby UPS Battery Backup and Surge Protector | 3 Surge-Only, 2x USB-a, 890j Surge, Energy Star, 3-Year Warranty

CyberPower SL700U Standby UPS Battery Backup and Surge Protector

Bottom line: The CyberPower SL700U Standby UPS Battery Backup and Surge Protector ($89.95 on Amazon as of 2026-10-20 22:16 UTC): Five battery-backup outlets plus three surge-only, eight NEMA 5-15R total; main trade-off: simulated sine wave, not pure sine - some active PFC PSUs object.

$89.95

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Buy on Amazon — $89.95 Also on eBay → Compare to similar power protection

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Five battery-backup outlets plus three surge-only, eight NEMA 5-15R total
  • ✓ 3-year warranty includes the battery, not just the electronics
  • ✓ Two widely spaced outlets fit oversized wall-wart adapters
  • ✓ 2.4A shared dual USB ports stay active while running on battery

Cons

  • ✗ Simulated sine wave, not pure sine - some active PFC PSUs object
  • ✗ 370W usable load limits it to one PC, not a full desktop plus monitor array
  • ✗ Five-foot cord may not reach a desk-side setup from a wall outlet
  • ✗ USB ports share 2.4A total, so charging slows with two devices

Manufacturer description

The CyberPower SL700U is a 700VA/370W standby UPS built for the moment your power drops out mid-session. Its slim profile hides eight NEMA 5-15R outlets: five that combine battery backup with surge protection for your PC, console, or router, and three surge-only outlets for peripherals that don't need runtime. Two of those outlets are widely spaced so bulky wall adapters don't steal a neighboring slot. When utility power fails, simulated sine wave output keeps your gear alive long enough for a graceful shutdown, so you don't lose an unsaved project or corrupt a save file. Two Type-A USB…

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SpecPicks Verdict

SpecPicks scored CyberPower SL700U Standby UPS Battery Backup and Surge Protector using a rating × review-volume × price-fit model applied to published specs and reviews across the power protection category. Compare with similarly-priced alternatives in the power protection category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power protection of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

How long will the SL700U keep my PC running during an outage?

Runtime depends on your load; the unit supplies 700VA/370W, which is sized for a graceful shutdown rather than extended operation. CyberPower's runtime chart on the product listing gives figures for specific wattages.

Will this work with a gaming console and a router?

Yes. CyberPower lists computers, gaming consoles, and broadband routers as intended loads. Plug them into the five battery-backup outlets and use the three surge-only outlets for accessories.

Does the 3-year warranty cover the internal battery?

Yes. CyberPower states the 3-year warranty includes the battery, and the unit carries a Connected Equipment Guarantee for hardware connected to it.

Is the output a pure sine wave?

No. The SL700U uses simulated sine wave output. Check your power supply's specs first if it uses active PFC, since some such units are sensitive to stepped waveforms.

Can I charge my phone from the UPS during a blackout?

Yes. The two Type-A USB ports share 2.4 amps total and remain functional on battery power, so phones and tablets keep charging through an outage.

Key Features

  • 700VA/370W Slim Profile Standby Uninterruptible Power Supply (UPS): Uses simulated sine wave output to provide battery backup power and to safeguard home office, home entertainment including computers, gaming consoles, and broadband routers
  • 8 NEMA 5-15R OUTLETS: Five battery backup & surge protected outlets, Three surge protected outlets; two outlets are widely spaced to accommodate larger plugs; INPUT: NEMA 5-15P right angle, 45 degree offset plug with five foot power cord
  • 2 USB CHARGING PORTS: Share 2.4 amps to charge and power tablets, smartphones, MP3 players, and other mobile devices; LED STATUS LIGHTS: indicates Power-On and Wiring Fault
  • GREENPOWER UPS HIGH EFFICIENCY DESIGN: Reduces power consumption by utilizing a compact charger and power inverter to create an ultra-efficient backup power system for home and office use
  • 3-YEAR WARRANTY – INCLUDING THE BATTERY; $100,000 Connected Equipment Guarantee; FREE PowerPanel Management Software (Download); UL SAFETY CERTIFIED: Product has been tested in a UL certified lab and listed with UL as meeting or exceeding safety standards

Full Specifications

BrandCyberPower
ColorBlack
Runtime2 minutes
Voltage120 volts
Wattage370 watts
Amperage3.08 A
Unit Count1 Count
Form FactorCompact
ConnectivityUSB
Model NumberSL700U
Input Voltage120 volts
Maximum Power370 watts
Connector TypeNEMA
Item Type NameStandby UPS
Output Current3.08 A
Output Voltage120 volts_of_alternating_current
Output Wattage370 watts
Frequency Range47 Hz – 53 Hz, 57 Hz – 63 Hz, 57 Hz – 63 Hz
Item Dimensions5 x 5.4 x 6.5 inches
Mfr Part NumberSL700U
Full listing titleCyberPower SL700U Standby UPS Battery Backup and Surge Protector | 3 Surge-Only, 2x USB-a, 890j Surge, Energy Star, 3-Year Warranty

Ready to buy?

CyberPower SL700U Standby UPS Battery Backup and Surge Protector | 3 Surge-Only, 2x USB-a, 890j Surge, Energy Star, 3-Year Warranty is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $89.95

*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.

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CyberPower SL700U Standby UPS Battery Backup and Surge Protector | 3 Surge-Only, 2x USB-a, 890j Surge, Energy Star, 3-Year Warranty
$89.95
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