2S 3A Li-ion Lithium Battery 7.4V 8.4V 18650 Charger Protection Board Module is a small PCB mounted Li-ion Lithium Battery charger protection module. This small and smart battery charger protection module comes with the various features like Short circuit protection, Overcharge protection, Over-discharge protection, Overcurrent protection. It is very easy to install and convenient to use in all your DIY portable projects. Specifications Of FDC-2S-22S 3A 7.4V 8.4V 18650 Lithium Lipo Cell Battery Charger Board Li-ion Battery Charging PCB BMS Protection Module HX-2S-01: Size: Approx. 36 x 6 x 1 mm(LxWxH). Over-Discharge Detection Voltage: 2.3-3.0V±0.05V Maximum Working Current: 3A Transient Current: 5A Operating Temperature : -40-50 C Internal Resistance: Less than 45m Ω B B-: The interface of battery core P P-: The connector of battery board MB: The connection point between the batteries. Package Includes : 1 x FDC-2S-22S 3A 7.4V 8.4V 18650 Lithium Lipo Cell Battery Charger Board Li-ion Battery Charging PCB BMS Protection Module HX-2S-01 in Pakistan