Universal battery tester: the battery tester is suitable for AAA, AA, C, D, 18650, 9V alkaline, dry batteries or rechargeable batteries; Battery power tester can display battery power instantly Portable battery tester: this portable battery tester is small and light, easy to carry, and can test the battery anytime and anywhere; The small size is suitable for putting in a kitchen drawer, desk, toolbox or in a pocket No battery required: the device does not need an additional battery to work, and it generates from the battery under test; Shorten test time to avoid unnecessary battery consumption Digital display screen: the universal battery tester has digital display function, which can directly display the battery status, digit indicates power level Essential tool: this is an essential tool for people who need to use standard or rechargeable household batteries; The portable battery level indicator can tell you whether you need to replace the battery, thereby effectively avoiding waste Colour:As shown Material:plastic Package Contents: 2 * Digital LCD universal battery testers Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.