GoPro AHDBT-901 Replacement Battery 3.85V 1720mAh

GoPro Hero 9 / Hero 10 / Hero 11 — 3.85V Li-ion Replacement Battery (AHDBT-901)

This 3.85V, 1720mAh Li-ion cell replaces the GoPro AHDBT-901 battery across the Hero 9, Hero 10, and Hero 11 action camera range. It matches the OEM part numbers ADBAT-001 and ADBAT-011. Swap it in when your original cell no longer holds a charge through a full shoot.

• Hero 9 / 10 / 11 platform fit: All three cameras share the same AHDBT-901 cell form factor, voltage rail, and BMS handshake protocol. One replacement covers all three bodies without any wiring or adapter changes.
• Bench tested on actual hardware: We cycled this cell through the Hero 11 body and a third-party dual charger. The BMS accepted the cell on both charge paths, balanced correctly, and held voltage within the expected discharge curve through multiple cycles.
• First charge on a Hero body: Insert this cell into the camera and run one full charge cycle through the camera body before heavy use. The Hero 9–11 BMS maps its battery-remaining display to a discharge curve learned during that first in-body charge — skipping this step causes erratic percentage readouts.

Why the Hero 11 shows a dead battery indicator on a freshly charged replacement cell

The Hero 11 reads battery state by comparing real-time cell voltage against a stored discharge curve. A new cell that has never been charged inside the camera body has no mapped curve on record, so the firmware defaults to a worst-case low-battery reading. This is not a fault with the cell. One full charge cycle inside the camera body — not just via an external charger — writes the reference curve and clears the false indicator. After that cycle, the percentage display tracks the actual cell state correctly.

Battery percentage jumping or resetting mid-shoot on the Hero 9 or Hero 10

A replacement cell has a slightly different discharge curve than the OEM cell the camera originally calibrated against. When the camera's fuel gauge algorithm hits a voltage point it doesn't expect, it recalculates sharply — showing a sudden jump or drop in percentage. This is a calibration gap, not a failing cell. Run two full charge-discharge cycles inside the camera body to let the BMS re-anchor its voltage thresholds to the new cell. After the second cycle, readings stabilise to within a few percent of actual charge remaining.