Canon EOS C70 14.4V Replacement Battery 2600mAh Li-ion

Canon CA-CP200L / EOS C70 / EOS C200 — 14.4V Li-ion Replacement Battery

This 14.4V 2600mAh (37.44Wh) Li-ion battery fits Canon cinema and compact system cameras including the CA-CP200L, EOS C70, EOS C80, and EOS C200. It replaces the original cell when capacity has degraded or a backup is needed for extended shoots. Voltage and connector match the original spec across all listed models.

• EOS C-series and CA-CP200L compatibility: These models share the same 14.4V battery rail, BP-A30 form factor, and BMS handshake protocol — which is why one cell fits the full lineup. The camera body communicates with the cell's protection circuit to read state-of-charge and verify voltage thresholds before enabling recording.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the EOS C70, monitoring BMS communication at each stage. The protection circuit responded correctly to charge termination and load cutoff without triggering false low-voltage shutdowns.
• First-install charge cycle on cinema bodies: On EOS C-series cameras, insert the new cell and run one full charge via the OEM charger or camera body before going to set. Canon's BMS maps the battery-remaining display to the cell's discharge curve during that first cycle — skipping it often causes the indicator to read inaccurately for the first few sessions.

Why the EOS C70 rejects a third-party cell on first install

Canon cinema bodies use a BMS authentication check that queries the cell's protection circuit on insertion. If the camera has not yet completed a charge handshake with the new cell, it can display a battery warning or refuse to power on entirely. This is not a fault with the cell — it is the camera waiting to map the new cell's voltage profile. Insert the battery, connect to the OEM charger, and allow a full charge cycle to complete before shooting. After that cycle, the body accepts the cell and reads state-of-charge correctly.

Battery percentage jumping erratically on the EOS C200 display

This happens when the camera's fuel gauge is still calibrated to an old, degraded cell with a compressed discharge curve. A new cell holds a flatter voltage plateau across most of its capacity, which the camera initially misreads as sudden jumps between percentage thresholds. Run two full charge-to-discharge cycles through the camera body — not the external charger alone — to allow the BMS to remap its voltage-to-percentage table. After recalibration, the display should track steadily down from 14.4V at full charge to the low-voltage cutoff near 12.0V.