About this replacement
GoPro Hero HWBL1 / Hero Plus — 3.7V Li-Polymer Replacement Battery (PR-062334)
This is a 3.7V 800mAh Li-Polymer cell that fits the GoPro Hero HWBL1, CHDHA-301, Hero Plus, and Hero+ compact action cameras. It matches the OEM part number PR-062334 and slots directly into the battery compartment. Voltage and capacity figures are drawn from the product data, not estimates.
- Hero HWBL1 and Hero Plus compatibility: These models share the same battery bay dimensions, connector pinout, and BMS communication protocol — that is why one cell covers all four variants listed. The 37.70 × 20.40 × 12.00mm footprint matches the original bay with no modification needed.
- Bench tested on actual hardware: We ran this cell through a full charge and discharge cycle on a Hero Plus body. The BMS accepted the cell without a rejection flag, reported capacity correctly after one full charge cycle, and held the voltage curve within range through the discharge.
- First-cycle initialisation on the Hero body: Charge the new cell inside the GoPro camera body — not an aftermarket external charger — before your first shoot. Some GoPro BMS firmware maps the battery-remaining display against a charge baseline recorded during that first in-body cycle. Skipping it can cause the indicator to read erratically from the start.
Why the Hero Plus shows a dead-battery icon on a partially charged replacement cell
The Hero Plus reads battery level by tracking voltage thresholds across the discharge curve. A new Li-Polymer cell has a slightly different resting voltage than a worn original, so the camera's BMS can misread a 60–70% charged new cell as empty. This is not a fault in the replacement cell — it is a calibration mismatch. Perform one complete charge cycle inside the camera body, then discharge through normal use, and the indicator will align to the new cell's curve. After that cycle, the dead-battery icon should only appear when the cell genuinely drops below 3.0V.
Battery percentage jumping around during video recording on the Hero HWBL1
Sustained 1080p video recording on the HWBL1 pulls current from the image sensor, processor, and Wi-Fi transmitter simultaneously — that combined draw causes short voltage dips that the BMS interprets as rapid capacity loss. The percentage readout can jump down several points during recording and then settle when load drops between clips. This is a display artefact from the BMS sampling voltage under high load, not actual cell degradation. If the jumps persist after one full in-body charge cycle, check that the battery contacts on both the cell and the bay are clean and making full contact.