Clean and shine those battery contacts.

[oplholik]

My wife brings these finger nail buffers home when she gets her nails done. I have tried them on my wrist watch, and crystal. Then I tried them on my batteries contacts, and boy do these things really clean and shine.

Revlon Crazy Shine Nail Buffer | Walgreens

 

[Ryedan]

Hmm, are these abrasive cleaners? If so I would be hesitant to use them on anything I wanted to keep for a long time.

 

[Jack Pappas]

I learned thirty years ago while serving as an Aviation Electronics tech to use a rubber eraser to clean contacts.