This is a Lipo Battery Power Level Tester with an Alarm to indicate low power. This unit can be used for 3.7V / 1S pack, 7.4V / 2S pack, or 11.1V / 3S pack. A red LED will flash when cell is below 3.3V and an alarm will sound when cell is below 3.0V indicating the Li-Po battery pack should be recharged.
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