$172.47
The Eaton 5S700 is the better UPS battery backup overall, rated 3.1 to 2.9. The Eaton 5S700 leads on features and warranty. The APC BE850G2 wins on value. The APC BE850G2 costs $34.77 less ($137.70 vs $172.47).
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.
$137.70
Which should you buy?
- Choose the Eaton 5S700 for features (automatic voltage regulation, software or network management vs USB charging) and warranty (3-year warranty, $150,000 equipment guarantee vs 3-year warranty, $75,000 equipment guarantee).
- Choose the APC BE850G2 for value ($30.60 per 100 W ($137.70, 450 W) vs $41.06 per 100 W ($172.47, 420 W)).
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 | Eaton 5S700 | APC BE850G2 |
|---|---|---|
| Overall rating | 3.1/5 | 2.9/5 |
| Value 25% | 52 $41.06 per 100 W ($172.47, 420 W) | 66 $30.60 per 100 W ($137.70, 450 W) |
| Output 15% | 11 420 W rated output | 13 450 W rated output |
| Topology and waveform 20% | 55 line-interactive, waveform not published | 50 topology and waveform not published (neutral score used) |
| Runtime 10% | 50 runtime at 100 W not published (neutral score used) | 38 35 min at 100 W |
| Features 15% | 45 automatic voltage regulation, software or network management | 15 USB charging |
| Warranty 15% | 49 3-year warranty, $150,000 equipment guarantee | 40 3-year warranty, $75,000 equipment guarantee |
Specifications
| Eaton 5S700 | APC BE850G2 | |
|---|---|---|
| Power | ||
| Rated apparent power | 700 VA | 850 VA |
| Rated real power | 420 W | 450 W |
| Topology | Line-interactive | - |
| Automatic voltage regulation | Yes | - |
| Battery and runtime | ||
| User-replaceable battery | Yes | Yes |
| Runtime at 100 W | - | 35 min |
| Outlets and features | ||
| Outlets | 8 (4 on battery) | 9 (6 on battery) |
| Format | Desktop | Desktop |
| USB charging ports | No | Yes |
| Data port, software or network option | Yes | No |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Connected-equipment guarantee | $150,000 | $75,000 |