It turns out that APC intentionally overcharges the batteries to maximize runtime during the 2-year target battery lifetime, at the cost of killing the batterie

It turns out that APC intentionally overcharges the batteries to maximize runtime during the 2-year target battery lifetime, at the cost of killing the batteries relatively young. And the overcharged voltage drifts upwards over time. I found this forum posting while searching for how to maximize the runtime on my APC UPS: https://forums.overclockers.com.au/threads/hacking-the-newer-apc-upss-mini-worklog-howto.1205748/ https://forums.overclockers.com.au/threads/hacking-the-newer...