[header] How to test your batteries [title] Get the battery you suspect is dead. [step] If you have have a device that harbors multiple batteries, it would be a good idea to test all of them. Keep in mind that this method only works for alkaline batteries, more specifically the aa and aaa models.
[title] Hold the battery with the negative terminal (flat side) facing down. [step] Preferably have it held one or two inches above a flat surface, such as a table.