Sena Prism SCA-A0102 Replacement Battery 3.7V 800mAh

Sena Prism / SCA10 — 3.7V Li-Polymer Replacement Battery (SCA-A0102)

This 3.7V, 800mAh Li-Polymer cell replaces the original battery in the Sena Prism and Prism Bluetooth Action Camera (SCA10, S7A-SP15). It matches the OEM part number SCA-A0102 and the original 39.10 x 34.92 x 9.10mm form factor. Riders and outdoor shooters use it to swap cells on location without stopping to charge.

• Prism and SCA10 platform fit: The Sena Prism line — including the SCA10 and S7A-SP15 variants — shares the same compact housing and connector pinout. All models draw from the same 3.7V rail, so one cell covers the full Prism family.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Prism body. The BMS accepted the cell without errors, voltage hold through recording was stable, and cutoff triggered cleanly at the low-voltage threshold without triggering a hard fault.
• First-use charge cycle on the Prism body: Insert the new cell and charge it fully through the camera body before your first recording session. The Prism's battery-remaining indicator calibrates its threshold map during that first in-body charge cycle — skipping it causes the percentage display to read inaccurately from the start.

Why the Prism cuts recording unexpectedly before the battery indicator hits zero

The Prism's BMS uses voltage thresholds mapped to the original cell's discharge curve. A new cell with a slightly different curve can trigger the low-voltage cutoff while the indicator still shows charge remaining. This is a calibration gap, not a faulty cell. Running one full charge-to-discharge cycle through the camera body lets the BMS re-map its thresholds to the new cell. After that cycle, cutoff behaviour aligns with what the indicator shows.

Battery percentage jumping erratically on the Prism display

Erratic percentage readings on the Prism usually mean the indicator is referencing stale threshold data from the previous cell. The display maps voltage steps to percentage bands — if the new cell's resting voltage sits between two stored bands, the indicator jumps. Power the camera off, leave it off for 60 seconds, then charge fully via the camera body until the indicator shows 100%. That resets the voltage-to-percentage mapping to the current cell.