Battery BA-300 for Sennheiser RI 410 (IS 410), RI 830 (Set 830 TV), RI 830-S, RI 840 (Set 840 TV), RI 900, RR 4200. - compare list

After receiving the batteries and charging both in the Sennheiser base station, one of them works but the other one doesn’t. The base station indicates that the defective battery is charged (green) when there is no charge in it.

Quality product.

very good