LuckyStone Universal Digital Battery Tester Volt Checker for AA AAA C D 9V 1.5V Button Coin Cell - BT-168D Use this innovative item to test all different kinds of batteries:9V 1.5V and AA AAA Cell. Easy-to-read digital screen. Check the power level of all 1.5V, 9V, and 1.5V miniature cells. Can quickly test the capacity of your battery. Test multiple sizes of batteries in one unit:Volt .