100% new and high quality. 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. Support overcharge protection, over-discharge protection and 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: 36V Applicable power: Less than 1000w Max. working current: 30A Continuous maximum current: 20A Overdischarge protection voltage: 2.6v Overcharge protection voltage: 4.25v Charging current: max. 20A High temperature discharge: 75 ℃ Low temperature charge: - 7 ℃ Weight: about 60g/set Size: 64mm x 35mm x 9mm Colour:As shown Material:PC+Metal Package Contents: 2 x Protection Board 2 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.