Sennheiser BA 300, Lithium-Polymer Battery, 3.7 V / 150 mAh, This product is compatible with 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@+*Notes on disposal:* Due to the current battery law, you are obliged as the end consumer to return all used batteries and cells.Disposal with household waste is not permitted. Batteries that contain hazardous substances are marked with a crossed dustbin sign and with the corresponding chemical symbol (Cd = cadmium; Hg = mercury; Pb = lead), for the contained hazardous heavy metal. Used and rechargeable batteries can be returned free of charge in store, at other points of sale for batteries, or at officially designated public points for disposal management.@+@+
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