I have been using a circuit to charge my lithium-ion cells with no problems, based on the TP4056 IC. Recently I have noticed some variants on the circuit which use a DW01A protection IC. How necessary is this extra IC and its external components?
I've not (knowingly) had any problems with my previous circuits which didn't include this extra component, but I would be interested in understanding better when this extra component would be advisable to use. The battery which I am intending to charge is this one. Many thanks.