3Series 12V 15A Li-ion Battery 18650 Charger BMS Protection Board (without balance)
$ 11.86
1Protection circuit board is the heart of battery pack, must to have to avoid battery pack from explosion, fire and damage 2It will protect battery pack from overcharging, over-discharging over-current and short circuit 3The protection board with balance has equilibrium function to keep each cell in balance and good service life 4Choosing the correct protection board and applying it appropriately is vital to the longevity your batteries 5Quiescent current 30uA, so power consumption is small.