To test all different kinds of batteries (AA, AAA, C, D, 9V, mini cell). Check the power level of all 1.5V, 9V, and 1.5V miniature cells. Test multiple sizes of batteries in one unit. (1.5V: AAA, HP16, MN2400, R03, AA, HP7, MN1500, UM3, C, HP11, MN1400, SP11, LR14, UM2, D, HP2, MN1300, SP2, R20, UM1; 9V: PP3, MN1604, 6F22, 006P).
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