Battery tester

Remember this bullshit?

Nice tester

battery waster

This is a pretty cool battery tester! My dad would love to add it to his box of batteries!

We indeed inventing alot of things

Next invent a device that tells you if you need to urinate

That's goodn

Cool product

Paying for advertising on this platform one would hope. Otherwise quit cluttering .

This is so useful—some come with a charger