ITEM NAME:3A 2S BMS 18650Li-ion Lithium Battery3.7V Charger Protection Circuit PCM LJ Product Description 100% Brand new and high quality 3A 2S BMS 18650 Li-ion Lithium Charging Battery protection board 3A 2S BMS 18650 Li-ion Lithium Charging Battery protection board Feature : high-accuracy voltage detection circuit; terminal of the charger using high voltage device; Built-in three-stage over-current detection circuit (over-current 1, over-current 2, or load short circuit); MOS transistor can control the battery charge and discharge; Low standby current consumption. Over charge voltage range : 4.25 ±0.05V.3A 2S BMS 18650 Li-ion Lithium Charging Battery protection board Feature .