I'm sure how to tell if these batteries are past their useful life. I took the pack out and all four batteries were cool to the touch so I don't think my UPS continuously cooks them or runs warm. None of them were bulging or leaking anything and the pack was easy to slide out. I can pull the plug from the wall for a couple minutes and it runs a 600W load.
I measured the voltages on the cells and they read 13.4V on each cell or 26.9V on each pair. Should I still replace them?
![1688408171881.png 1688408171881.png](http://www.storageforum.net/forum/data/attachments/1/1139-0dd585c1a49755cda8896dcb4053c98d.jpg)
I measured the voltages on the cells and they read 13.4V on each cell or 26.9V on each pair. Should I still replace them?
![1688408171881.png 1688408171881.png](http://www.storageforum.net/forum/data/attachments/1/1139-0dd585c1a49755cda8896dcb4053c98d.jpg)