Universal Button Battery Checker Tester AA AAA C D 9V't for Which Batteries to Keep and Which to throw , Place your battery between the two points of the battery tester, and the easy-to-read display will tell you instantly whether you have a dud, or if you can out another few minutes of battery life.Checks power level of all 1.5V & 9V batteriesEasy to read, colour coded meter indicates power levelTests 1.5V miniature cellsThree : red=replace, yellow=low power, green=goodIf needle does not move,check that battery is touching both contacts assumingthat it is completely dead.The battery tester may be used to test the following sizes:1.5V:AAA,for HP16, MN2400, R03AA, HP7, MN1500, UM3C, HP11, MN1400, SP11, LR14, UM2D, HP2, MN1300, SP2, R20,UM19V: PP3, MN1604, 6F22, 006PNOTE:The battery tester is activated by the battery being checked. Keep test as short as possible, to avoid unnecessary battery drain.Note:AAA battery not includetype: Battery Testercolor:Black+redMaterial:ABSPackage Contents:1 x Battery TesterOnly the above package content, other products are not included.Note: Light reflection 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.