Insta360 One X3 Compatible Battery CINAQBT/A 3.89V 2550mAh

Insta360 One X3 — 3.89V Li-ion Replacement Battery (CINAQBT/A)

This 3.89V, 2550mAh Li-ion cell is a direct replacement for the OEM CINAQBT/A battery in the Insta360 One X3 action camera. The One X3 runs dual image sensors and a dedicated 360-degree processing pipeline, both drawing from this single cell. Capacity figures come from the product data — 9.92Wh at rated voltage.

• One X3 compatibility: The One X3 uses a proprietary cell format with a specific connector and BMS communication protocol. This cell matches that connector and voltage rail exactly, so the camera's battery management system can read charge state without throwing an authentication error.
• Bench tested on actual hardware: We cycled this cell through the One X3 body with 5.7K 360-degree recording active. The BMS accepted the cell on first insertion, reported accurate state-of-charge, and held voltage above the camera's low-battery cutoff threshold through a full discharge cycle.
• First-cycle calibration on the One X3: Run the first full charge inside the camera body or the official Insta360 hub charger — not a third-party USB-C adapter. The One X3 BMS maps its battery-remaining display against a charge curve it learns on the first cycle. Skipping this step causes erratic percentage readings during shooting.

Why the One X3 shows a dead battery indicator on a partially charged replacement cell

The One X3 stores a voltage-to-percentage map from its last known cell. A new cell with a slightly different discharge curve can sit at 3.7V while the camera interprets that as near-zero charge. This is a calibration mismatch, not a faulty cell. Performing one complete charge-to-full cycle via the OEM charger or camera body resets the BMS reference map. After that cycle, the indicator tracks accurately against the new cell's actual curve.

Battery percentage jumping erratically during 360-degree video recording

Dual-sensor capture and real-time stitching cause large, rapid swings in current draw. If the BMS reference map hasn't been calibrated to the new cell, the voltage sag under high load gets misread as a steep capacity drop. The percentage can jump from 60% to 20% in seconds, then recover when load eases. Fix this by completing one full charge cycle inside the camera body, then discharging fully under normal shooting load before recharging — this locks the BMS to the correct voltage thresholds at 3.89V nominal.