I've recently bought a single cell, 600 mAh lithium battery (like this one) and a TP4056 battery charger module, which I intended to use with the battery. The charger has an integrated protection circuit based on a DW01 IC with a 8205a dual MOSFET IC. I have already replaced the resistor connected to the TP4056 to limit the charging current to 500 mA.
I'm not sure if the battery has its own protection circuit. The guy that sold it to me didn't have a clue and I have found contradictory info in several websites. Is there a way to check if the battery has its own protection circuit (hopefully without having to push the battery to a condition where this protection would trigger).
My main concern is what would happen if I connect a battery with a protection circuit included to a second protection circuit. Would it work correctly?