H3wastooshort, 11 months ago (edited 3 months ago)

For a charger you can use a TP4056 module, many of these have protection built-in. You can tell by them having two more small chips near the solder pads, and of those pads having 4, two for battery + and - , and two for whatever you are attaching that will be protected

pic of one of those modules

you can usually find them by sth like tp4056 module with battery protection circuit

the ones with usb c usually are designed without the cc pulldown resistors and thus will usually only function with usb a to usb c cables