HQRP Battery for Sennheiser BA150 BA151 BA152 Fits A200 / A 200, HDI302 / HDI 302, IS150 / IS 150 Headphones / Receiver - Walmart.com
Cameron Sino Battery Ba150, Ba151 For Sennheiser A200, Hdi302, Hdi380,hdi490,is 150,is 300,is 380, R150, Ri 150,ri 250 ,ri250s - Digital Batteries - AliExpress
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