JVC SSL-JVC50 GY-HMQ10 Replacement Battery 7.4V 5200mAh

JVC GY-HM600E / GY-HMQ10 Series — 7.4V Li-ion Replacement Battery (SSL-JVC50)

This 7.4V, 5200mAh (38.48Wh) Li-ion cell replaces the SSL-JVC50 battery used in JVC professional camcorders. It fits the GY-HMQ10, GY-HM600E, GY-HM600EC, GY-HMQ10E, and related models in that lineup. The cell matches OEM voltage, capacity, and connector pinout for the SSL-JVC50 slot.

• GY-HM600 and GY-HMQ10 platform fit: These models share the same SSL-JVC50 battery bay, 7.4V nominal voltage rail, and multi-pin communication interface. The BMS handshake expects a specific cell voltage signature at startup — this replacement meets that requirement.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the GY-HM600E platform. The BMS accepted the cell on first install, reported charge status correctly, and held voltage within 0.1V of OEM across the discharge curve.
• First-use charge cycle on GY-series bodies: Insert the cell into the camera body and run a full charge via the OEM charger before your first shoot. JVC's battery management system maps the remaining-charge display to a discharge curve it calibrates on that first cycle — skipping it can cause the indicator to read inaccurately for the first few uses.

Why the GY-HMQ10 reports an unexpected low-battery warning during 4K recording

The GY-HMQ10 runs four simultaneous codec streams during 4K recording, which pulls significantly more current than single-stream HD modes. That extra draw causes a sharper voltage sag mid-cell, which the camera's BMS can read as a low-battery condition even when the cell is not depleted. A replacement cell with a fresh, unaged anode handles that transient sag better than a degraded original. If the warning appears repeatedly, check that the battery contacts on the camera body are clean — even slight oxidation raises contact resistance and worsens the sag.

Battery percentage jumping erratically on the GY-HM600E display

This happens when the camera's fuel-gauge algorithm is still mapped to the discharge curve of the old, degraded cell. A new cell has a flatter mid-range voltage curve than a worn one, so the indicator can skip or jump until the BMS recalibrates. Run one complete charge-to-full, then discharge-to-cutoff cycle inside the camera body — do not pull the cell partway through. After that single calibration cycle, the percentage display should stabilise and track the new cell accurately down to the 3.0V per-cell cutoff.