From time to time, all of us mix up АА batteries. When the time comes to replace them, we can never tell which one’s still got charge and which one’s already flat. And checking them is almost impossible, since very few of us have the right equipment or device for this at home.
But now you can forget all about this problem, because WeGoRo has prepared a video for you that reveals a simple but highly effective method for checking the charge in your batteries.
As you can see, if you drop the battery from a small height, it will "stay on its legs" if it’s charged. If it has run out of energy, then it will fall. Remember this simple trick, and you’ll never get flat and charged batteries mixed up again.