Sports Camera HT200 Replacement Battery 3.7V 1800mAh Li-ion

Sports Camera HT200 / TM200 — 3.7V Li-ion Replacement Battery

This 3.7V 1800mAh Li-ion cell replaces the original battery in the Sports Camera HT200 and TM200 action cameras. It fits the compact battery bay on both models and restores full shooting capability when your original cell no longer holds a charge. Dimensions are 53.00 × 35.30 × 11.00mm — confirm these match your existing cell before fitting.

• HT200 and TM200 compatibility: Both models share the same battery bay dimensions, voltage rail, and connector orientation, which is why a single cell covers both. The onboard BMS on each camera communicates with the cell over the same charge management protocol.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on camera hardware and confirmed the BMS accepted the cell without rejection flags. Charge termination cut off correctly at full voltage.
• First-cycle acceptance tip: Run the first full charge inside the camera body using the OEM cable — not a standalone charger. Some action camera BMS systems only map the battery-remaining indicator accurately after completing one charge cycle from within the camera body itself.

Battery percentage jumping erratically on the HT200 display

The HT200 maps battery percentage against a fixed voltage-threshold table calibrated to the original cell's discharge curve. A replacement cell with a slightly different internal resistance will produce voltage readings that don't line up with those thresholds. The indicator can jump from 80% to 40% mid-session or stall at one level for an extended period before dropping sharply. Running one complete charge-discharge cycle inside the camera body allows the BMS to recalibrate against the new cell's actual curve.

Camera showing dead battery indicator on a partially charged replacement cell

This happens when the camera's low-voltage cutoff triggers against a new cell that arrived partially discharged from storage. The BMS reads the resting voltage, sees it near the cutoff threshold, and flags it as depleted before the cell has had a chance to condition. Place the cell in the camera and charge it fully via USB before attempting to power on. Once it reaches 4.2V at the termination point, the indicator should clear and the camera will boot normally.