BT series battery tester can be used to check the output voltage of battery easily and quickly. They are designed for 1.5V and 9V batteries with models:
AAA, AA, C, D, SH16, MN2400, R03, HP7, MN1500, UM3, HP11, MN1400,
SP11, LR14, UM2, HP2, MN1399, SP2, R20, UM1, PP3, MN1604, 6F22, 006P.
Size "AAA" UM4 1.5V;
Size "AA" UM3 1.5V;
It also can be used to test silver oxide 1.5V button/watch cells.
