Sennheiser Rechargeable Battery (BA-300)

Lithium polymer rechargeable battery suitable for: Set 900, RI 900, Set 840-TV, RR 840, Set 840 S, RR 840 S, Set 830-TV, RI 830, Set 830 S, RI 830 S, IS 410, RI 410, RS 4200, RR 4200, HDI 830.