Sennheiser BW 900, BW-900 Mobile Business Solution Rechargeable Battery
Specification:
Type: Li-Polymer
Voltage: 3.7V
Capacity: 170mAh
Weight 43g
Dimensions: 34x 23.5 x11mm.
Color: Black
This Headphone Battery can replace the following part numbers:
SENNHEISER
BATT01 BATT-01
This Headphone Battery is also compatible with the following models
BWT900 BWT-900 BW900BAT
And more models.