Insta360 One X3 Replacement Battery 3.85V 1800mAh CINAQBT/A

Insta360 One X3 — 3.85V Li-ion Replacement Battery (CINAQBT/A)

This is a 3.85V, 1800mAh Li-ion cell that fits the Insta360 One X3 360-degree action camera. It replaces OEM part CINAQBT/A and uses the same connector and physical footprint as the original. Voltage and capacity match the One X3's power system exactly.

• One X3 power system fit: The One X3 uses a single-cell 3.85V pack with a multi-pin connector that carries both power and BMS communication data. This cell matches that pin layout and voltage rail, so the camera's battery management system can read state-of-charge correctly without a handshake error.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the One X3 body. The BMS accepted the cell without a rejection flag, and the protection circuit tripped correctly at the low-voltage cutoff threshold — no hard shutdowns mid-cycle.
• 360-degree sensor load tip: The One X3 runs two wide-angle lenses and dual image sensors simultaneously. Avoid pulling the battery mid-session without powering the camera down first — abrupt cuts under full sensor load can cause the BMS to log a fault state that affects charge-remaining accuracy on the next cycle.

Why the One X3 shows a dead-battery indicator on a freshly installed replacement cell

The One X3's fuel gauge maps battery percentage to a specific discharge curve stored in the camera firmware. A new third-party cell arrives at a partial state of charge, and the camera may read that mid-range voltage as critically low if it hasn't calibrated to the new cell yet. This triggers the dead-battery icon even though the cell has usable charge remaining. Run one full charge cycle through the camera body or OEM charger — this gives the BMS enough data points to remap its percentage readout to the new cell's actual curve.

Battery percentage jumping erratically during recording on the One X3

This happens when the camera's voltage-threshold indicator interprets the new cell's discharge curve differently from the original cell it was calibrated against. The One X3 pulls higher instantaneous current during 360-degree video encode, which causes brief voltage sag — the BMS reads that dip and recalculates percentage sharply downward, then recovers. It is a calibration mismatch, not a faulty cell. Complete two full charge-to-discharge cycles in the camera body and the percentage display will stabilise as the BMS builds an accurate model of the new cell — verify by charging to 4.20V before the second cycle begins.