Dual Battery Lifesaver PCB (November 2021)

PCB for the Dual Battery Lifesaver project in the November 2021 issue of PE.

Please note this PCB is supplied without components.

This small board provides an easy way to protect rechargeable batteries from being completely drained if a device is accidentally left switched on. It can work with devices that run from a single battery, or two separate batteries. Both thresholds are fully adjustable, and it can handle several amps per battery, drawing just a few microamps when off.