HQRP Battery for Sennheiser BA150-152, A200, HDI302, HDR85, IS150, RI150, RI300, RI500, RS30, RS40, RR2500, Set250 (Electronics)
To continue listening to music or TV without disturbing anyone that discusses ... and without being disturbed by it. Just under 12. Provided of course have an old Sennheiser BA150, which only needed a new battery to resume service.