IKEGAMI BP-65H Replacement Battery 14.4V 4400mAh Li-ion

IKEGAMI BP-65H / E-80 / E-80S — 14.4V Li-ion Replacement Battery

This is a 14.4V, 4400mAh (63.36Wh) Li-ion battery replacing the IKEGAMI BP-65H, E-80, and E-80S cells. It fits IKEGAMI professional broadcast and ENG camera systems that run on this voltage rail. Use it in any body or charger that accepts the original BP-65H form factor.

• BP-65H, E-80, E-80S platform: These three part numbers share the same 14.4V rail, connector pinout, and BMS communication protocol across IKEGAMI's ENG and broadcast camera lineup. One cell covers all three positions without rewiring or adapters.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, monitoring BMS handshake signals and cutoff behaviour. The protection circuit responded correctly to both low-voltage cutoff and over-current events at broadcast load levels.
• First-cycle charge protocol on IKEGAMI bodies: Run the first full charge through the OEM charger or camera body — not a generic dock. IKEGAMI's BMS may not map the battery-remaining indicator accurately until it completes one full charge cycle from within a recognised charger, causing the gauge to read flat even on a full cell.

Why the battery-remaining gauge locks at zero on first install

IKEGAMI broadcast bodies use a voltage-threshold map built during the first recognised charge cycle to calibrate the fuel gauge. A new cell that has not completed that cycle sits outside the expected starting voltage window, so the body reads it as dead or uncalibrated. This is a BMS initialisation state, not a fault in the cell. Insert the battery and charge it fully in the OEM charger — the gauge will display correctly from the second use onward.

Battery percentage dropping suddenly mid-recording on ENG runs

Under sustained video recording load — sensor, processor, lens control, and viewfinder all drawing simultaneously — voltage sag at the cell terminals can drop below the camera body's next threshold step faster than the gauge updates. The display jumps down several percent in one step rather than declining smoothly. This is a gauge-mapping behaviour tied to the discharge curve of a fresh cell, not capacity loss. After two or three full discharge cycles the curve stabilises and the readout tracks more evenly. Confirm the cell is sitting above 12.0V at rest after a partial discharge to rule out a deeper fault.