2S 3A Li-ion Lithium Battery 18650 Charger Protection Board BMS Module 7.4V 
 
Technical parameter:
Overload detection voltage: 4.25-4.35 V ± 0.05 V
Excessive discharge detection voltage: 2.5-3.0 V ± 0.05 V
Maximum operating current: 3A
Transient current: 5A
Quiescent current: less than 3μA
Internal resistance: <45 mΩ
Operating temperature: -40-50°C
Size: 36×6.5mm
Connection of the description:
B + B-: connect to battery
P + P-: connect to the charging/discharging
terminal MB: The connection point between batteries
B +: Battery V + positive
B-: Battery V-negative
P +: Output/charge V +
P-: Output/charge V-