This tester is designed for testing battery,bulb and fuse. It can be used to test dry cell 1.5V batteries(AAA,SH16,MN2400,R03, AA,HP7,MN1500,UM3,C,HP11,MN1400,SO11,LR14,UM2,D,HP2,MN1399,SP2,R20,UM1, etc), 9V batteries (6F22, 006P, PP3, MN1604, etc), household and automotive fuses, various bulbs.