Do you have a stash of alkaline batteries, but aren’t sure whether they’re still holding a charge for use? Here’s a simple way to test their stored charge using a fascinating method: drop them a few inches onto a hard surface, listen to the sound it makes, and check if they land standing up. The explanation of the “why” and “how” below.
This Is How You Find Out Whether A Battery Is Full Or Empty
According to tech YouTube vlogger Kipkay, a battery with a full or near full charge dropped a few inches will often land upright with a solid “thump” sound, while a drained alkaline will bounce, due to the accumulation of gas produced inside after all the alkaline is used. Give it a try the next time when it’s time to replace the remote or wall clock batteries (I did, and it worked just as shown above!).
Via The Awesomer
This is how you find out whether a battery if full or empty with just one look
