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This is a HQRP replacement battery for a bunch of Sennheiser wireless headsets—RI810, RI810S, RS30, HDR85, RR820, HDR80, RS40, that family.

It's Ni-MH, 2.4 volts, 80mAh.

If your headset's dying fast or not holding charge, this might fix it.

New, sealed.

California folks got a Prop 65 warning, but that's everything these days.

Solid little battery.

4 out of 5