CyberPower ST625U
A small standby UPS that suits one desktop PC without a gaming graphics card, or a home network closet.
Amazon $79.95$79.95
The CyberPower ST625U and the Vertiv Liebert PowerUPS 100 PST6-900LVMT are evenly matched, rated 2.8 and 2.8. The CyberPower ST625U leads on features and warranty. The CyberPower ST625U costs $10.04 less ($79.95 vs $89.99).
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.
Vertiv Liebert PowerUPS 100 PST6-900LVMT
A low-cost Vertiv standby UPS for a router, modem and light desktop loads.
Amazon $89.99$89.99
Which should you buy?
- Choose the CyberPower ST625U for features (USB charging, software or network management vs USB charging) and warranty (3-year warranty, $100,000 equipment guarantee vs 3-year warranty, no equipment guarantee published).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every desktop (under 1,000 VA) UPS battery backup; a clear win is highlighted. How we rank explains each one.
| Factor weight | CyberPower ST625U | Vertiv Liebert PowerUPS 100 PST6-900LVMT |
|---|---|---|
| Overall rating | 2.8/5 | 2.8/5 |
| Value 25% | 81 $22.21 per 100 W ($79.95, 360 W) | 74 $25.71 per 100 W ($89.99, 350 W) |
| Output 15% | 7 360 W rated output | 6 350 W rated output |
| Topology and waveform 20% | 0 standby, simulated sine wave | 25 standby, waveform not published |
| Runtime 10% | 50 runtime at 100 W not published (neutral score used) | 50 runtime at 100 W not published (neutral score used) |
| Features 15% | 35 USB charging, software or network management | 15 USB charging |
| Warranty 15% | 44 3-year warranty, $100,000 equipment guarantee | 35 3-year warranty, no equipment guarantee published |
Specifications
| CyberPower ST625U | Vertiv Liebert PowerUPS 100 PST6-900LVMT | |
|---|---|---|
| Power | ||
| Rated apparent power | 625 VA | 900 VA |
| Rated real power | 360 W | 350 W |
| Topology | Standby | Standby |
| Battery waveform | Simulated sine | - |
| Automatic voltage regulation | No | No |
| Battery and runtime | ||
| Battery type | - | Lead-acid |
| User-replaceable battery | - | Yes |
| Outlets and features | ||
| Outlets | 8 (4 on battery) | 8 |
| Format | Desktop | Desktop |
| Display | LED indicators | - |
| USB charging ports | Yes | Yes |
| Data port, software or network option | Yes | No |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Connected-equipment guarantee | $100,000 | - |