650mAh 2.40Wh Battery For Sennheiser HD 4.50 BTNC Wireless Bluetooth Headphone
For Sennheiser HD 4.40 BTNC. For Sennheiser HD 4.50 BTNC. Battery Capacity : 3.7V 650mAh 2.40Wh. For Sennheiser Urbanite XL. The Tools is free, so i can't Promise tools will be suitable for your Device.