Connector Type: PH2 2.0mm Pitch
Length: 75.0mm
Width: 40.0mm
Thickness: 7.9mm
voltage : 3.7v
Capacity: 4000mAh
Charge/Discharge Rate: Standard 0.2C, MAX 1C,PCM restrict 2.5A
Red connect "+", Black connect “-”
Reversed the polarity before match Adafruit circuit
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