3x CELLONIC® Battery Replacement for Sennheiser RS 400, RI 50, HDR 60, HDR 4, RR 820, HDR 65, HDR 40 Wireless Bluetooth Headphones Headsets 60mAh BA 150,BA 151,BA152 Spare Accu Pack: Amazon.co.uk: Electronics & Photo
Amazon.com: MPF Products BA 150, BA 151, BA 152 Rechargeable Battery Replacement Compatible with Sennheiser IR and RF Wireless Headsets (Compatible Models Listed in Description Below) : Electronics
Empire Replacement Battery, Works with Sennheiser BA151 Replacement, (Ni-MH, 2.4V, 80 mAh) Ultra Hi-Capacity Battery : Electronics - Amazon.com
Amazon.com: 2 Pack Replacement for Sennheiser SET250 Battery - Compatible with Sennheiser BA151 Headset Battery (60mAh 2.4V NI-MH) : Electronics
Amazon.com: LIFH Replacement Battery for Sennheiser Set 250, Set 2500, Set 250S, Set 500, Set 50TV, Set 810, Set 810S, Set 820, Set 820s fits Sennheiser BA150, BA151, BA152, WEST-BA151(Ni-MH 60mAh /
Amazon.com: Sennheiser BA 151 Rechargeable Battery for IR and RF Wireless Headsets : Electronics