I have a portable device that's powered with a single 18650 cell, mounted in a Keystone 1043 holder, and draws about 1-2A at most (in short bursts) The battery is charged with a built-in USB charger. Since the battery is removable, and the holder is symmetrical, I want to protect the circuit against reverse polarity. My question/doubt is - if I use a simple N-channel MOSFET, for example, the SI2312CDS-T1-GE3 from Vishay, which has a low G-S threshold, and connect it like on the attached schematics - will it create any issues with the charging of the cell? Am I wrong to assume that if the gate voltage of an N-Mosfet is greater than the source, the channel will be open and allow both normal current flow and charging?
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