GoPro AHDBT-001 Hero Replacement Battery 3.7V 1100mAh

GoPro Hero / HD Hero Series — 3.7V Li-ion Replacement Battery (AHDBT-001)

This is a 3.7V, 1100mAh Li-ion replacement battery for the GoPro Hero, HD Hero, HD Helmet Hero, and HD Motorsports Hero action cameras. It uses OEM part numbers AHDBT-001, ABPAK-001, and AHDBT-002, covering the original Hero line and its early variants. Same voltage, same capacity, same connector footprint as the factory cell.

• Hero series compatibility: The original Hero, HD Hero, HD Helmet Hero, and HD Motorsports Hero all share the same battery bay geometry, 3.7V nominal rail, and contact layout — one cell fits all of them without modification.
• Bench tested on actual hardware: We cycled this cell through the GoPro Hero body and monitored the BMS handshake. The cell passed charge acceptance on first insertion and held voltage above 3.5V through full discharge without triggering premature cutoff.
• First-cycle conditioning on the Hero: Run one complete charge cycle inside the camera body before heavy shooting. The Hero's battery-remaining indicator maps voltage thresholds to percentage during that first charge — skipping it can cause the display to misread state of charge throughout the cell's life.

Why the GoPro Hero shows a dead battery indicator on a partially charged replacement cell

The Hero reads remaining charge by tracking voltage against a stored threshold map calibrated to the OEM cell's discharge curve. A new replacement cell hasn't completed a reference cycle, so the camera's voltage-to-percentage mapping starts misaligned. The indicator can read zero or flash the low-battery warning even when the cell is above 3.6V. One full charge cycle from inside the camera body resets the mapping and corrects the display.

Battery percentage jumping erratically on the Hero display

This happens when the camera's indicator firmware samples voltage during a load spike — video recording, LED indicator, and the image processor all pull current simultaneously, causing momentary voltage sag. The Hero interprets that sag as a lower state of charge and updates the display mid-shot. The fix is to complete two full charge-discharge cycles so the BMS stabilises its voltage baseline. After conditioning, the indicator should track smoothly down from 100% without sudden drops; verify the resting voltage reads 4.18V–4.20V at full charge.