3 string 12V18650 lithium battery protection board.
25A over-current over-discharge protection.
Protect your lithium battery.
Excellent performance and durability.
Strictly according to the diagram wiring: 0V(B-)3.7V(B1)7.4V(B2)11.1V(B+), Do not deliberately short circuit.
After the line is connected, Need to charge first, then have output.
When the battery is connected in series with 3 groups, Please ensure that the voltage of each battery is the same. If not same, please fill in each set of batteries and then use.
Do not mix the good battery and the bad battery.
The capacity of the battery internal resistance is closer will be better.
note:
This protection board can not be used for lithium iron phosphate battery, xenon lamp, hand drill battery pack, can not be used for electric fish battery pack, electric bicycle battery pack, baby car battery, 775 (4A) or above motor, 1W fisheye LED lamp, Customers who use the above combination purchases should pay attention!

Specification:
Size: about 56mm*45mm*1.2mm
Over voltage range: 4.25-4.35v±0.05v
Over discharge voltage range: 2.3-3.0v±0.05v
Maximum operating current: 0-25A
Maximum transient current: 34-40A
Quiescent current: less than 30uA
Internal resistance: less than 100mΩ
Working temperature: -40---+50°
Storage condition: -40-- +80°
Effective life: more than30000h
Short circuit protection: Yes, delayed self recovery
Color: as shown

Package: 
1 pc * Lithium battery protection board