1.Power Supply:No battery needed

2.Pocket size, ergonomic design,Easy to use

Easy to read display indicates power level

4.Check power level of all 1.5V &9V batteries

Test 9V battery

The battery tester may be used to test the following size:

9V:PP3,MN1604,6F22,006P

Test miniature cells

Test arm

For battery's positive terminal

Test 1.5V battery

The battery tester may be used to test the following size:

1.5V:AAA,HP16,MN2400,R03,AA,HP7,MN1500,UM3,C,HP11,MN1400,SP11,LR14,UM2,D,HP2,MN1300,SP2,R20,UM1.