GoPro Hero 3 AHDBT-201 Replacement Battery 3.7V 1180mAh

GoPro Hero 3 Series — 3.7V Li-ion Replacement Battery (AHDBT-201 / AHDBT-301)

This is a 3.7V, 1180mAh Li-ion cell that replaces the original battery in the GoPro Hero 3, Hero3 White Edition, Hero3 Silver Edition, and related HD Hero3 variants. It matches the OEM voltage and physical dimensions exactly — 36.77 × 28.80 × 13.21mm — so it slots into the same battery door without modification. Capacity is rated at 4.37Wh.

• Hero 3 series compatibility: The Hero 3, Hero3 White, and Hero3 Silver all share the same battery bay geometry and voltage rail. OEM part numbers AHDBT-201 and AHDBT-301 cross-reference the same physical cell across these models, so one replacement covers the full lineup.
• Bench tested on actual hardware: We ran this cell through the Hero 3 body and monitored BMS handshake on first insertion. The camera accepted the cell without error, cycled charge correctly via USB, and the battery indicator tracked consistently across discharge.
• First-use charge cycle on the Hero 3: Slot the battery into the camera body and run a full charge through the camera itself — not a third-party external charger — before your first shoot. The Hero 3's BMS maps its battery-remaining display against an internal charge profile, and this single in-body cycle anchors that calibration accurately.

Battery percentage jumping erratically on the Hero 3 display

The Hero 3 tracks remaining charge by mapping voltage thresholds against a stored discharge curve from the OEM cell. A new replacement cell has a slightly different discharge curve shape, so the voltage-to-percentage mapping can look erratic — jumping from 80% to 40% without warning. This is not a fault in the replacement cell. One full discharge-to-empty followed by a complete in-body recharge resets the mapping and the display stabilises.

Hero 3 showing dead battery icon on a partially charged replacement

Some Hero 3 bodies display a dead battery icon immediately after a new cell is inserted, even when the cell carries a charge. The camera's BMS compares the cell's resting voltage against an acceptance threshold — if the cell shipped partially discharged, the resting voltage may sit just below that threshold. Place the cell in the camera, connect USB charging, and let it charge for at least 10 minutes. Resting voltage at full charge should read approximately 4.2V, at which point the camera accepts the cell and boots normally.