Under $100 buys a standby UPS for a router, modem and light desktop loads. Check the watt rating against what you plan to plug into the battery outlets.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Best UPS Battery Backups Under $100: Desktop (under 1,000 VA)
- $83.99600 VA / 330 W-23 min
- CyberPower ST625U#2 of 7Full review
A small standby UPS that suits one desktop PC without a gaming graphics card, or a home network closet.
Amazon $79.95$79.95625 VA / 360 WStandby, Simulated sine- - CyberPower SL700U#3 of 7Full review
A slim standby UPS for a basic desktop PC and a router.
Amazon $89.95$89.95700 VA / 370 WStandby, Simulated sine- - Vertiv Liebert PowerUPS 100 PST6-900LVMT#4 of 7Full review
A low-cost Vertiv standby UPS for a router, modem and light desktop loads.
Amazon $89.99$89.99900 VA / 350 WStandby- - $62.50425 VA / 255 W-15 min
- Amazon Basics UPS 800VA#6 of 7Full review
A basic standby UPS for a PC and monitor at a low price.
Amazon $87.96$87.96800 VA / 450 WStandby- - CyberPower ST425#7 of 7Full review
An entry-level standby UPS for a modem, router and a small piece of home networking gear.
Amazon $59.95$59.95425 VA / 260 WStandby, Simulated sine-
