Cameron & Co DS-CS-SBA880SL cell phone battery 3.7V 280mAh 1.04Wh

Compatible replacement battery

This 3.7 V 280 mAh Li-Polymer cell replaces the original Sennheiser AHB571935PCT-03 pack used in the Flex 5000, RS 2000, RS 5000 and Set 880 headsets. It restores the 1.04 Wh capacity the headset was designed for. The black housing matches the factory appearance. Buyers needing a higher-capacity pack or a different voltage will not be served by this model.

Mechanical fit and electrical match

The cell measures 37.50 x 20.00 x 6.20 mm and uses the same connector and polarity as the BAP 800, BAP800, BAP-800 and CP-SN800 part numbers. No soldering or adapter is required for the listed Sennheiser models. It frees the headset from a depleted original pack without modifying the charging circuit. Installers who cannot access the battery compartment or who need a different form factor cannot use this unit.

Steady discharge on a Bluetooth load

Under the continuous low-current draw of a Bluetooth headset the 0.28 Ah cell delivers its rated 1.04 Wh without voltage sag. The Li-Polymer chemistry maintains a stable 3.7 V nominal output through long listening sessions. It does not exhibit the sharp capacity drop that some chemistries show in high-drain bursts. Users who subject the pack to heavy pulsed loads outside the headset's normal profile will see different runtime.