Tester for all battery types Features  Use this product to test all types of batteries (AA, AAA, C, D, 9 V, mini cells). Check the power level of all 1.5V, 9V and 1.5V mini cells. Easy to read, indicates the power level. Can quickly check battery capacity. Test different battery sizes in one piece. (1.5 V) AAA, HP16, MN2400, R03, AA, HP7, MN1500, UM3, C, HP11, MN1400, SP11, LR14, UM2, D, HP2, MN1300, SP2, R20, UM1; (9 V) PP3. Battery in good condition: 1.5V-1.28V, 9V-7.8V Battery to replace: below 1.15V, less than 6V As soon as the battery is placed against the contacts, the LCD screen turns on showing the power level,   if the screen does not light up make sure that the contacts are well placed, otherwise it will mean that the battery is exhausted     Product code: BT-168D