Perfect for when you want to listen to some tunes but your original wireless battery is being charged. The Sennheiser BA 151 wirelss headphone battery is also ideal if your original battery is suffering from old age or missing in action.

This battery will work with the following Sennheiser wireless headphone models: IS 150, IS 300, IS 380, RS 30, RS 40, RS 45, RS 60, RS 65, RS 80, RS 85 and RS 2400 headphones.