Blackmagic Design Pocket Cinema Camera BMPCCASS/BATT 7.4V Li-ion Compatible Battery

Blackmagic Design Pocket Cinema Camera — 7.4V Li-ion Replacement Battery (BMPCCASS/BATT)

This is a 7.4V, 850mAh Li-ion replacement for the original Blackmagic Design Pocket Cinema Camera battery. It fits the compact cinema camera body and restores full power for video recording and camera operation in the field. Capacity is 850mAh (6.29Wh), matching the OEM specification.

• Pocket Cinema Camera fit: The Pocket Cinema Camera uses a single-cell Li-ion pack at 7.4V nominal. The BMS inside the camera reads cell voltage directly — any replacement cell must hold the correct voltage window or the camera will refuse to power on. This cell matches that voltage rail and the physical LP-E6-style connector the body uses.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Pocket Cinema Camera body. The BMS accepted the cell without error, completed a full charge cycle, and the camera powered on and held the voltage under active recording load without triggering an undervoltage cutoff.
• First-install charge cycle on this camera body: The Pocket Cinema Camera BMS calibrates its battery-remaining indicator during the first charge cycle it performs on a new cell. Charge this replacement fully inside the camera body — not in an external charger — before your first shoot. This lets the BMS map the new cell's discharge curve correctly so the indicator reads accurately.

Battery percentage jumping on the Pocket Cinema Camera display

The Pocket Cinema Camera maps its battery-remaining display to voltage thresholds set against the original cell's discharge curve. A new third-party cell can have a slightly different curve — even at the same rated capacity — causing the indicator to jump in large steps or skip from 80% to 20% without warning. This is a calibration issue, not a fault with the cell. Run one full charge-to-discharge cycle inside the camera body to let the BMS relearn the curve. After that cycle, the readout typically stabilises and tracks the actual cell voltage accurately.

Camera body warm during sustained video recording on a fresh replacement cell

The Pocket Cinema Camera draws current not just from the sensor and processor but also from the active recording pipeline, which generates consistent heat during long takes. A new cell at full charge delivers current at the top of its voltage range, which can feel like the camera runs warm compared to a partially depleted original battery. This is normal — the combined draw from the sensor, codec processing, and display is higher under active recording than standby. If the camera cuts out rather than just running warm, check that the cell voltage hasn't dropped below 6.0V under load, which indicates a genuine undervoltage cutoff.