Description:
Overcharging Range: 4.25 ± 0.05V to 4.35V; Over Voltage Range: 2.3 ± 0.05V to 3.0V; Maximum working current: 8A; Maximum instantaneous current: 16A.
Useful: Use for variety of capacities and various shapes 3.7V lithium batteries,Massager battery pack, LED light backup power supply, solar street light battery pack, monitor standby power supply, etc.
MULTIPLE PROTECTION: Over-discharge protection, overcurrent protection, overcharge protection, short circuit protection; A combination of 4 safety features that work together to provide ultimate protection for your devices.
ATTENTION: Strictly according to the diagram wiring: B+: Battery V+ Positive, B-: Battery V- Negative, P+: Output / Charging V+, P-: Output / Charging V-, MB: The connection point between the batteries.Otherwise it will cause damage to the chip. Do not mix the good battery and poor battery to use. The internal resistance of 3 battery capacity are closer will be better. 
Package Includes:10PCS 2S 7.4V 8.4V 8A Lithium Battery Protection Board.

Specifications:
Charging Voltage: 8.4V
Overcharge Voltage Range: 4.28V plus or minus 0.05V
Overpressure Voltage Range: 2.3V-2.9V plus or minus 0.05V
Upper Limit Operating Current: 8A
Upper Limit Instantaneous Current: 16A
Quiescent Current: less than 30uA
Size: 41mm x 8mm x 2.2mm/ 1.61″ ×0.31″×0.09″(L x W x H)
Overcharge protection, over discharge protection, short circuit protection, overcurrent protection.

Welding Point Description:
B + battery anode;
B - connect battery negative terminal;
MMB connect battery 1 to battery 2;
P + charging/discharge correct poles (charging end/discharge end sharing);
P - charging/discharge terminal negative terminal (charging end/discharge end sharing).

Wiring:
B+ : Connect to battery positive.
B- : Connect to battery negative.
MB: Connection point between battery 1 and battery 2.
P+: Positive pole for charging/discharging (common at charging/discharging end).
P- : Negative pole for charging/discharging end (common at charging/discharging end). 

Attention:
Strictly according to the diagram wiring: B+: Battery V+ Positive, B-: Battery V- Negative, P+: Output / Charging V+, P-: Output / Charging V-, MB: The connection point between the batteries.Otherwise it will cause damage to the chip.
Do not mix the good battery and poor battery to use.
The internal resistance of 3 battery capacity are closer will be better.

Tips:
the product must be connected to a 8.4V charging voltage through p+ and p- before it will create voltage on pads.Or you can activate this BMS by momentarily shorting b- and p-.