High Compatibility: Work for standard and rechargeable household batteries AAA, AA, C, D, 1.5V, 9V and button cell batteries.   Good Helper: Battery checker tester expect a result almost instantly. It accurately tests the condition of batteries, and lets you know if they need to be replaced.   Easy to Read: Battery checker tester activated by the battery being checked, the pointer clearly show the current battery health status accurately.   Portable & Light: ABS material makes this battery tester volt checker is small and exquisite, you can put it in a pocket easily.   [Portable Battery Tester]This digital battery tester volt checker is small and lightweight, you can put it in a kitchen drawer,desk,toolbox or in a pocket making it easy to take with you wherever you go, It quickly and accurately tests the condition of your batteries, letting you know whether they need to be replaced.      Color: Black   Material: plastic      Package Contents:   4 x Battery Tester