How to test AA and AAA batteries using a multimeter
I have a drawer full of spare AA and AAA batteries. Some are fresh, some are from remote controls that died last winter, some I found in a toy. Before tossing them or putting them to use, I check the voltage with a multimeter. It takes thirty seconds and saves you from guessing. What you need A cheap multimeter is all you need. Any digital one will do — I’ve used the same £8 model from Amazon for years. The probes should be intact and the battery in the multimeter itself should have charge (if it beeps when you turn it on, you’re good). ...