GB Battery Tester
If you're always wondering how much charge is left in that battery in the junk drawer, then this is the tool for you! Gardner Bender's handy battery tester tests all common household batteries to determine existing charge. It provides a quick, visual low/good indicator, and has a movable contact arm to fit multiple battery sizes.
Gardner Bender GBT-3502 Battery Tester, D/C/AAA/AA/9V:
Tests all common household batteries
Determines existing charge
Quick, visual low/good indicator
Movable contact arm fits multiple battery sizes
Tests: AA, AAA, C, D, 9V, 1.5V button cell and N style batteries