Amazon.com: HQRP Battery Compatible with Sennheiser EK 300 IEM G3, EK 500 G2, ew 145 G2, ew 145 G3, ew 152 G2, SK 2000 Headphones/Receiver/Transmitter : Health & Household
DIY battery eliminator for sennheiser G3/2 - Do It Yourself - JWSOUNDGROUP
sennheiser dc2,usb battery adapter,converter for sennheiser evolution series