RCA CC-8251 Replacement Battery 7.4V 4000mAh BPL30

RCA CC-8251 / PRO-V730 / PRO-V742 — 7.4V Li-ion Replacement Battery (BPL30)

This 7.4V Li-ion battery delivers 4000mAh (29.6Wh) for the RCA CC-8251, PRO-V730, and PRO-V742 digital camcorders. It replaces OEM part numbers BPL30, VM-BPL27, and VM-BPL27A. The cell fits the original battery bay and connects to the camcorder's onboard BMS via the same contact arrangement as the factory pack.

• CC-8251, PRO-V730, and PRO-V742 compatibility: These three RCA camcorder models share the same battery bay dimensions, 7.4V voltage rail, and BPL30-series connector pinout. One replacement cell covers all three bodies without modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the CC-8251 body. The BMS accepted the pack without error flags and voltage under record load held above the 6.8V low-cell threshold throughout testing.
• First charge via camcorder body: On first install, charge this cell inside the camcorder body rather than a third-party charger. The CC-8251's BMS runs an initialisation handshake on the first in-body charge cycle, which sets the reference point for the battery-remaining indicator. Skipping this step can cause the indicator to read inaccurately from the start.

Dead battery indicator on the CC-8251 with a partially charged replacement cell

The CC-8251 maps its battery-remaining display to a voltage-threshold curve calibrated for the original BPL30 discharge profile. A new aftermarket cell can have a slightly different discharge slope, causing the camera to report empty while the cell still holds usable charge. This is a calibration mismatch, not a cell fault. Running two or three full charge-to-discharge cycles through the camcorder body allows the BMS to re-map its thresholds to the new cell's actual curve. After conditioning, the indicator stabilises and tracks remaining charge accurately.

Battery percentage jumping erratically during recording

If the percentage display on the CC-8251 skips non-linearly — say, dropping from 60% to 30% in seconds or jumping back up — the BMS voltage-to-percentage lookup table is misreading the new cell's discharge curve. This most often happens when the pack has not completed a full initialisation cycle inside the camera body. Charge the battery to 100% through the camcorder, record until the camera shuts off on low-battery cutoff, then recharge fully. One complete in-body cycle is usually enough to re-anchor the percentage readout to the correct voltage points.