Circuit provides reverse-battery connection protection

https://www.electronics-lab.com/circuit-provides-reverse-battery-connection-protection/

A universal problem in battery-operated devices is the threat of damage when an end-user (never an engineer) inserts the battery backward. You can avoid damage by inserting a single diode or by using a diode-bridge configuration, but those fixes waste power and reduce the supply voltage by adding one or two diode drops between the […]