How to Quickly Test UPS Batteries Without the UPS Itself

The method start at 4:37 (apparently I'm a fly who can't remember to put timecodes in the video).

Some car battery testers can be used with UPS batteries to quickly and easily tell how much life remains using internal resistance measurements.

Long time no videos. Also, did I just subconsciously steal Ben Krasnow's outro?

I have a second channel:
https://www.youtube.com/channel/UCN3Dgu6CVBcecDkc5DmIIqw

Видео How to Quickly Test UPS Batteries Without the UPS Itself канала Mark Furneaux