Sena 10C Replacement Battery 3.7V 1000mAh Li-Polymer

Sena 10C / 10C Pro — 3.7V Li-Polymer Replacement Battery (YP803040P)

This is a 3.7V, 1000mAh lithium-polymer cell built to the YP803040P spec for the Sena 10C and 10C Pro motorcycle Bluetooth headsets. It fits the camera-integrated communication unit riders use for intercom, hands-free calling, and music streaming. Dimensions are 41.00 × 29.50 × 8.00mm — confirm these against your existing cell before fitting.

• 10C and 10C Pro compatibility: Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol, so one cell covers both. The 10C Pro draws slightly more current during simultaneous camera recording and intercom use — the 1000mAh capacity and protection circuit are rated for that combined load.
• Bench tested on actual hardware: We cycled this cell through the Sena charging circuit and confirmed the BMS protection logic triggered correctly at low-voltage cutoff. Charge acceptance was clean across all test runs with no false full-charge flags.
• First-cycle logging for the 10C: After fitting, run the headset through a complete charge in the cradle before pairing or recording. The 10C's firmware uses the first full charge cycle to log the new cell — without it, the on-screen battery indicator will misread remaining capacity.

Why the 10C cuts out mid-intercom when camera recording is active

The 10C runs its Bluetooth radio, intercom mesh, and camera encoder off the same 3.7V cell simultaneously. Under that combined draw, instantaneous current demand can spike sharply — enough to trip the BMS undervoltage protection even when the battery reads 40–50% remaining. This is not a fault in the cell; it is the protection circuit doing its job. If cutouts happen repeatedly, check that the firmware is current, as Sena has issued updates that adjust the power-sharing logic between camera and comms functions.

Talk time shorter than expected after the first few charges

A fresh lithium-polymer cell does not deliver full rated capacity on cycle one. Electrolyte wetting and electrode activation take three to five full charge-discharge cycles before the cell reaches its nominal 1000mAh output. Riders who replace the battery and immediately compare talk time to a worn-in original pack will see a shortfall — this closes over the first week of normal use. Let the headset discharge fully through a ride, then charge completely in the cradle; repeat this three times to complete conditioning.