ReZap Battery Engineer: Recharge old disposable batteries

How many times did it happen to you that you have all sorts of old gadgets that you don’t even use anymore because they need new batteries? Getting rechargeable batteries is a good solution but we know how expensive they can be, and buying new disposable batteries each and every time can be more than a tiresome process, so what can you do? This solution comes from the United States and it is called ReZap Battery Engineer.