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  • The voltage range is 2-3.6v usually so maybe a schottky diode and you'd be able to run them safely off a LiPo with no quiescent current from a regulator.

    1. LiPo at full charge is 4.2.

    2. Forward leakage in sleep mode could be a problem: http://forum.arduino.cc/index.php?topic=­375269.0

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