Рет қаралды 133,041
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:
/ @markfurneaux2659