Features The protection board is for 10 series cell Li‑ion batteries, it can be used for 3.7V ternary batteries, manganese acid batteries and cobalt acid batteries. This Protection Board supports over charge protection, over discharge protection, over current protection, short-circuit protection, temperature protection, Downtime protection，Voltage balance(passive balance), etc. The Lithium battery protection board has balance function which would ensure each battery cell being fully charged at same time. The maximum working current is 30A, and the continuous maximum current is 20A. The protection board has the function of ensuring that each battery is fully charged at the same time, which saves time and effort. The protection board is widely used in electric cars, electric assisted vehicles, scooters, inverters and other tools. Specifications:Applicable voltage: 36VApplicable power: <1000wMaximum working current: 30AContinuous maximum current: 20AOverdischarge protection voltage: 2.6v Overcharge protection voltage: 4.25v Charging current: Maximum 10A Balance voltage: 4.2vWeight: 46g BMS Protection Board Wiring Steps 1. Firstly connect the batteries in series 2. Ensure that the voltage of each string is the same (the difference between the highest voltage and the lowest voltage is preferably within 0.1V), and the voltage range is between 3.2-4.0V. 3. Firstly connect the distributed cable, connect according to the diagram, and insert the cable port into the board port after checking it is correct (first connect the battery, then insert the board, the step cannot be reversed). 4. Check whether the total positive voltage of the C-port and P-port to the battery is equal to the total voltage of the battery. If they are equal, the board is working normally. 5. Solder the battery negative B- to the port marked B- on the board. 6. Both the battery output negative electrode and the charging negative electrode of the same port board are connected to the port marked C- on the board (the P- port is just floating). 7. Separate port (different port) board, the battery output negative pole is welded P-, and the charging negative pole is welded into the port marked C- on the board. Package included: 1 x Protection Board1 x Cable Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List