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.

Battery Charger Protection Board is a 3S 10A board. Lithium Batteries BMS with 10.8V rated voltage for polymer battery, 11.1V 18650, or 3.7V lithium battery rated voltage and  12.6V lithium battery can be charged. And discharge 10A (referring to the maximum discharge current limit) Lithium battery protection board it also comes with over-charge, over-discharge, over-current, short circuit protection. A battery pack built together with a battery management system with an external communication data bus is a smart battery pack. A smart battery pack must be charged by a smart battery charger.

Using the resistance of the discharge process, resistive load will seriously heat, please pay attention to safety.Please install the 50W aluminum resistance (has been soldered half part of high temperature line) to a metal plate to use.This circuit voltage in order to improve the measurement accuracy, specially designed DC bias, when the terminal connects nothing will display a small voltage, but does not affect the actual measurement, if you are shorting the input terminal (absolute 0V) will display 0. If you want to know the principle, you can check the superposition theorem of electrical engineering.