question about dry 3 xml and batteries

[scaru]

@Shadowww

@scaru

If you have any old laptop batteries lying around those generally have some good cells in them.

old laptop battery pack cells might be good by capacity, but they generally have increased internal resistance, making them not-so-good for high-current applications (such as DRY flashlight)

Is there any way to measure the internal resistance of a battery? The only way of doing so that I know of is with a hobby charger.