Battery I.D. Idea for Your Home Shop

Family Handyman

I got extra batteries for my cordless tools, but I could never remember which battery was newly charged and which was run down. Now I can easily tell them apart because I painted a number on each battery with my kid’s white nail polish. It dries fast and is— you got it—“tough as nails.” — Tom Baker

Plus: Learn how to double the life of your car battery.