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It's very compact and fits easily in your pocket. Build materials are not the best. The display is easy to read at most angles. The jaw has a max opening of 72.53mm. It has relatively good accuracy, there is only a 0.02V difference in measurements compared to a Mustool multimeter. I run several measurement tests on various sizes and types of batteries and the Aneng 168max battery tester showed proper readings for all except from button cells.
Tester to check the battery charge 1. 3.7 V: 18650,16340,14500,10440, 21700 1.5 V: AAA, MN2400, R03 AA, HP7, MN1500, UM3 C, HP11, MN1400, SP11, LR14, UM2 D, HP2, MN1300, SP2, R20, UM1 3. 9V: PP3, MN1604,6F22,006P Good quality product. Recommended for professional and hobby use.