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TonBG248126253 Congratulations to add a battery to a portable device. I ordered one, looked at the voltage input diagram, sequence is connector - diode - switch - LM1117 fixed at 3.3 volts. So, the diode drops 0.6 volts and the LM1117 has a dropout of 0.6 volts, which makes me believe that 4.5 volts is the minimum input voltage, if you don't bypass the 1N4007 diode.

transferx 13/02/2020
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