high-accuracy voltage detection circuit terminal of the charger using high voltage device Built-in three-stage over-current detection circuit (over-current 1, over-current 2, or load short circuit) MOS transistor can control the battery charge and discharge low standby current consumption. Overcharge voltage range: 4.25-4.35v±0.05v Over discharge voltage range: 2.3-3.0v±0.05v Upper limit working current: 20-25A (pay attention to heat dissipation) Charging voltage: 12.6V-13V Strictly follow the wiring diagram 0V (B-), 37V (B1), 7.4V (B2), 11.1V (B+) Do not deliberately short circuit Note:due to different production batches, there are differences in printing screen printing, which does not affect the use. Color:Green Material:PCB+Components Package Contents: 1 * lithium battery protection board 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.