Right-hand battery parameters: about 51mm in length and 19mm in diameter
Capacity: 1380mah voltage 3.7v
Left-hand battery parameters: about 44mm in length and 16mm in diameter
Capacity 650mah Voltage 3.6v
In addition, there is a battery with a ball handle and an Android interface that requires a 1651 model.
The head with the ball and without the ball are as follows respectively