Specifications: 
Charging voltage: 21V
Charge MOS pressure value: 35V
Discharge MOS pressure value: 35V
Charging current: 56A
Continuous discharge current: 15A
Over current protection: 50/55/60A
Over current protection delay: 20/25/30mS
Single power consumption: 30uA
Power consumption between batteries: 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 circuit protection/Over current protection/Overload/Over discharge protection: disconnect load self-recovery
Short circuit protection delay: 200/500/600uS
The normal working state of B- to P- resistance: 5mΩ
Continuous 15A current maximum temperature rise: 25 ℃
Working environment (humidity) relative humidity: ≥98% (long-term stability under the humidity)
Working environment (temperature) -30 ~ 80℃(in the lower temperature range of long-term stability)
Size: approx. 60*23mm
Attention:  
When you wiring, plese do it strictly according to the wiring diagram. Do not deliberately make it short circuit.
Do not mix the good battery and poor battery to use.
The internal resistance of 5 battery capacity are closer will be better.
Package inlcuded:  
1x 5S 15A lithium Battery Protection Board
1x 6-core wire