The protection board is for 13 series cell Li-ion batteries, it can be used for 3.7V ternary batteries, manganese acid batteries and cobalt acid batteries. Support overcharge protection, over-discharge protection, overcurrent protectionand short circuit protection. It is suitable for electric car, electric power assistant car, skateboard car, inverter, etc. With temperature control protection function, safe and reliable. Applicable voltage: 48V Applicable power: Less than 2500W Max. working current: 60A Continuous maximum current: 40A Overdischarge protection voltage: 2.6V Overcharge protection voltage: 4.25V Charging current: max. 10A High temperature discharge: 75 ℃ Low temperature charge: -7 ℃ Weight: about 60g/set Size: 70x56x9mm Colour:As shown Material:PC+Metal Package Contents: 3 x Protection Board 3 x Cable(Due to different product batches, the appearance may be different, but the function is the same) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.