Reddit reviews APC Back-UPS ES 550VA Replacement Battery
We found 3 Reddit comments about APC Back-UPS ES 550VA Replacement Battery. Here are the top ones, ranked by their Reddit score.
UPG # 40800 UB1270 12V 7AhDimensions: 5.94 inches x 2.56 inches x 3.86 inches. Weight: 4.80 LbsSLA/AGM maintenance free, spill proof batteryRechargeable battery that can be mounted in any position, resists shocks and vibration1 Year Warranty
This is what's in the purchasing record for the last couple they bought. Reviews on it suggest that it fits in the APC 550s.
https://www.amazon.com/APC-Back-UPS-550VA-Replacement-Battery/dp/B001NIFI28/ref=sr_1_2?ie=UTF8&qid=1473712329&sr=8-2&keywords=APCRBC110
I wonder if cheap UPS batteries would work for you. They usually aren't very heavy (relatively) and typically hold enough charge to power a computer for about 30 minutes, so 40W should be enough.
What about 2 of these in parallel?
You don't need to send the APC ones in. You just take out the battery, recycle it (lol), and put the new one that you ordered from APC in (or amazon... like here: https://www.amazon.com/APC-Back-UPS-550VA-Replacement-Battery/dp/B001NIFI28)
Source: Worked as a linux server admin for a couple years and had to replace a ton of them.