Products trademarked HQRP® are marketed and sold exclusively by Osprey-Talon. This Replacement Rechargeable battery is compatible with following models: Sennheiser HDR 4, Sennheiser HDR 400, Sennheiser HDI 302 Headphones / Stethophones System.
100% compatible with Original Battery.
Battery Voltage: 2.4V; Capacity: 80 mAh; Ni-Mh;
Bundle includes HQRP® Rechargeable Battery plus Coaster;
Ni-Mh batteries last longer and provide notably more talk time than Nickel Cadmium batteries;
High Quality, high capacity, light weight rechargeable battery. Longer battery life
than the original battery that comes with the Headset. No memory effect. Can be charged or discharged as needed without loss of capacity. Overcharge protection, with built in battery life ...