4.2V(4V2) version:

Multi-cell 3.7V/4.2V Li-ion/Polymer Battery(packs) Charge Balance Module

(1) High Precision Voltage Detection Circuit
    Overcharge detection voltage 4.000~4.500V Accuracy±25mV
    Overcharge release voltage 3.800~4.500V Accuracy±35mV
    Standby detection voltage 2.70V Accuracy±15%
    Standby release voltage 2.70V Accuracy±15%
(2) Delay times are generated by an internal circuit (external capacitors are unnecessary).
(3) Low consumption current
    Operation mode Typ. value 2.5μA, max. value: 3.5μA (VDD=3.9V)
    Standby mode Max. value:0.5μA (VDD=2.7V)
(4)Wide operation temperature range: -40℃~ +85℃

Main control chip : HY2213-BB3A
Size : 30mm x 28mm x 8mm 
Weight : 3.5g


3.6V(3V6) version:

Multi-cell 3.2V/3.6V LiFePO4 Battery(packs) Charge Balance Module

(1) High Precision Voltage Detection Circuit
    Overcharge detection voltage 3.200~4.000V Accuracy±25mV
    Overcharge release voltage 3.000~4.000V Accuracy±35mV
    Standby detection voltage 2.70V Accuracy±15%
    Standby release voltage 2.70V Accuracy±15%
(2) Delay times are generated by an internal circuit (external capacitors are unnecessary).
(3) Low consumption current
    Operation mode Typ. value 2.5μA, max. value: 3.5μA (VDD=3.2V)
    Standby mode Max. value:0.5μA (VDD=2.0V)
(4) Wide operation temperature range: -40℃~ +85℃

Main control chip : HY2212-BB3A
Size : 30mm x 28mm x 8mm 
Weight : 3.5g

Please contact me for the chip manual.

The value of Rb is the value of 4 resistors connected in parallel.
The  Balance current is determined by the value of the Rb1- Rb4 resistor. Changing the value of Rb1- Rb4 can change the  Balance current

4.2V(4V2) version : Balance current(A)= 4.2/Rb
3.6V(3V6) version : Balance current(A)= 3.6/Rb