Insta360 One X2 Replacement Battery 3.85V 1700mAh CINOSBT

Insta360 One X2 — 3.85V Li-ion Replacement Battery (CINOSBT)

This 3.85V, 1700mAh Li-ion battery replaces the OEM cell in the Insta360 One X2 360-degree action camera. It fits the dual-lens body directly and uses the same connector and BMS handshake as the original. Capacity is 6.55Wh — matching the stock specification from the product data.

• One X2 compatibility: The One X2 uses a specific 3.85V cell with a multi-pin connector that carries both power and BMS communication. This battery matches that connector pinout and voltage rail, so the camera body recognises it on insertion without firmware prompts.
• Bench tested on actual hardware: We ran this cell through the One X2 charge cycle using an OEM-spec charger. The BMS accepted the cell, reported charge state accurately after one full cycle, and held voltage within the expected discharge curve under continuous 360 recording load.
• First-cycle initialisation on the One X2: Charge this battery fully inside the camera body before your first shooting session. The One X2 BMS maps its battery-remaining display to the cell's discharge curve during that first charge — skipping it can cause the indicator to read inaccurately for the first several sessions.

Why the One X2 battery percentage jumps erratically after fitting a new cell

The One X2 uses a voltage-threshold model to estimate remaining charge. A new cell has a slightly different discharge curve than a broken-in OEM cell, so the camera's threshold mapping can read the wrong percentage until the BMS recalibrates. This shows up as the indicator jumping from, say, 60% to 20% without any heavy use in between. Run one full charge-to-discharge cycle — charge to 100% in the camera, then record until the camera shuts off automatically — and the indicator will stabilise. After that cycle, percentage reporting aligns with the new cell's actual curve.

One X2 showing a dead battery icon with a cell that charged overnight

This happens when a replacement cell is charged externally before the camera's BMS has authenticated it. The One X2 BMS runs an initialisation check on first contact with the camera body — if it hasn't completed that check, the camera can reject the cell entirely and display a dead or missing battery icon. Remove the battery, reinsert it, and charge it from 0% directly inside the camera body using a USB-C cable rated at least 18W. Once the camera reaches 100% through that in-body charge, the BMS registers the cell as valid and the icon clears.