1 x Battery Tester Tests 1.5V miniature cells C, HP11, MN1400, SP11, LR14, UM2 Net weight: 51g Item size: 110*59*25mm D, HP2, MN1300, SP2, R20,UM1 or if you can out another few minutes of battery life. AAA,for HP16, MN2400, R03 AA, HP7, MN1500, UM3 battery tester is activated by the battery being checked. Keep test times as short as possible, to avoid unnecessary battery drain. Color: Black Three result: red=replace, yellow=low power, green=good Easy to read, colour coded meter indicates power level 9V: PP3, MN1604, 6F22, 006P Place your battery between the two points of the battery tester, Note:AAA battery not include that it is completely dead. If needle does not move,check that battery is touching both before assuming The Checks power level of all 1.5V & 9V batteries and the easy-to-read display will tell you instantly whether you have a dud, Battery Tester Is Activated By The Battery Being Checked. Keep Test Times As Short As Possible, To Avoid Unnecessary Battery Drain. Color: Black Three Result: Red=replace, Yellow=low Power, Green=good AA, HP7, MN1500, UM3 And The Easy-to-read Display Will Tell You Instantly Whether You Have A Dud, That It Is Completely Dead.