Features1No Battery Required: This battery tester is powered and activated by the battery being checked, so you can quickly get a diagnosis of your battery's health. 2Condition Checking: This digital battery tester is the great tool for checking the condition of your household batteries. 3Wide Application: This battery volt checker is suitable for checking AA/AAA/C/D/9V/1.5V button cell all household batteries. 4Portable Size: This universal battery tester is small in size and light in weight, easy to carry wherever you go, or put it into the drawer, table, tool box and pocket. 5Warm Tips: Keep this small battery tester in a dry place to avoid damaging the battery tester in a humid and hot place.SpecificationItem Type: Battery TesterMaterial: ABSPurpose: Battery Capacity CheckingProduct Size: Approx. 11.2 x 2.7 x 6cm / 4.4 x 1.1 x 2.4in ( Manual Measurement, Slight Error May Exist )Weight: Approx. 57g / 2.01ozPackage List1 xBattery Tester