... 1.voltage range:+/-5V 2.current range:0-50mA 3.accuracy: 0.1% 4.independent channel The button cell battery tester has ... small-scale battery formation, capability grading, battery pack testing and etc.1. The button cell battery tester has 8 channels,each of channel ... and polymer batter, etc. ), phone battery, and so on.2. Button cell battery tester's internal electrical power supply uses the high ...