This post has little to do with cars, but if it works it’s way to valuable not to post.
If you have ever found yourself swapping batteries into remotes, flashlights, etc. trying to figure out which one of the many may or may not be dead then you must watch this video. This simple way to test small batteries without having a meter is ingenious… if it works.
I can’t wait to try it for myself and see how well it works.