HQRP Battery compatible with Sennheiser BA2015 / BA 2015 fits EK 100 G2, ew 100 G2, ew 100-ENG G3 Headphones/Receiver / Transmitter plus Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 2.4V; Capacity: 1600 mAh; Ni-Mh; Compatible with Original Battery; 200 Days warranty! Hear to win with HQRP&reg; replacement battery!