Sennheiser TV Replacement Battery BA300
Sennheiser BA300 Battery, Packaged differently than in the picture.
Lithium polymer rechargeable battery for
Set 900, RI 900, Set 830-TV, RI 830, Set 830 S, RI 830 S, Set 840-TV, Set 840-S, RI 840, IS 410, RI 410, RS 4200, RR 4200
