Name: protection board Charging voltage: 21 V; Charge MOS pressure value: 35 V; Discharge MOS pressure value: 35 V; Charging current: 56 A; Continuous discharge current: 20 A Over current protection: 50/55/60 A; Over current protection delay: 20/25/30mS; Single section since the power consumption: 30uA; Single section between the power consumption: 3uA Single section over charge detection voltage: 4.18- /4.22V; Over charge recovery voltage 4.05- 4.15 V; Over charge detection delay: 0.5/1.0/2.0S; Single section over discharge detection voltage: 2.75-2.85 V; Over discharge recovery voltage: 2.90-3.20 V; Over discharge detection delay: 0.5-2.0S Short / over / over current protection recovery short circuit / over discharge / over current protection after removal of load auto recovery Short circuit protection delay 200/500/600uS The normal working state of B- to P- resistance: 5m ohm Continuous 20A current maximum temperature rise: 25℃ Working environment (humidity) relative humidity: greater or equal to 98% (long-term stability under the humidity) Working environment (temperature) -30 ~ 80℃(in the lower temperature range of long-term stability) colour: green Material: plastic Package Contents: 2 x Battery protection board(Factory slightly different) Only the above package content, other products are not included. Note: Light 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.