It is suitable for 3.7V ternary, lithium cobaltate, lithium manganese oxide battery. Applicable power and voltage: 48V, less than 2500W The overcharge protection. Over discharge protection Over current protection. Output short circuit protection. Specification: Working current: 50A (max) Continuous working current: 40A (max) Over-discharge protect voltage: 2.6V Over-charge protect voltage: 4.25V Charge current: 40A Balance charge voltage: 4.2V Application: electric car, twist car, electrician bicycle, scooter, inverter and so on. Material: PC+Metal colour: As shown Package Contents: 1 x Battery Protection Board(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.