How to check how good battery is with only phone and multimeter?
I have a bunch of batteries and few working 3GSs. Recently I've been told you could test battery approximate state by checking amperage it takes during charging.
So now I have multimeter and if it is true I need some info on that and maybe points to put probes for checking that mAmps since I don't want to cut an Usb cord for that)
Is this a good question?