LP-E6N Canon EOS 5D Mark II Replacement Battery 7.2V 2000mAh

Canon EOS 5D Mark II / III Series — 7.2V Li-ion Replacement Battery (LP-E6N)

This is a 7.2V, 2000mAh Li-ion replacement for the Canon LP-E6N battery. It fits the EOS 5D Mark II, 5D Mark III, 5DS, and 5DS R, along with other Canon EOS bodies that share the LP-E6 battery platform. It replaces original cells that have lost capacity after repeated charge cycles.

• LP-E6 platform compatibility: Canon's EOS mid-range and full-frame bodies share the same LP-E6 battery slot, voltage rail, and BMS communication protocol. That includes the 5D series, 6D series, 7D series, and several R-series bodies. One battery fits all of them because the connector, cell voltage, and BMS handshake are identical across the platform.
• Bench tested on actual hardware: We ran this cell in a 5D Mark III body. The BMS accepted the cell after one full charge cycle via the Canon LC-E6 wall charger. Battery percentage displayed correctly once the camera completed its initial voltage-threshold calibration pass.
• First charge protocol for accurate metering: Canon's BMS maps the battery-level indicator to the cell's discharge curve during the first charge cycle. Run the first charge in the Canon charger or camera body — not a third-party multi-bay charger — so the camera logs the correct threshold data from the start.

Why the 5D Mark II shows a dead-battery icon on a partially charged replacement cell

The 5D Mark II uses a fuel-gauge BMS that reads internal resistance alongside voltage to estimate remaining charge. A new third-party cell has a different internal resistance profile than the OEM cell the camera learned on. Until the camera completes a full discharge-charge cycle, it maps the new cell's resistance incorrectly and reports zero charge even when the cell is above 50%. One full charge cycle through the Canon LC-E6 corrects the baseline and the indicator displays accurately from that point.

Battery percentage jumping erratically on the 5D display mid-shoot

This happens when the camera's stored discharge curve doesn't match the actual curve of the new cell. The Canon EOS body interpolates remaining charge by tracking voltage drop rate — if the new cell's voltage drops faster or slower at a given state of charge, the percentage indicator jumps to catch up. It is not a fault with the cell. Fully discharge the battery in-camera, then charge it completely using the Canon LC-E6 charger. After one complete cycle the camera recalibrates and the readout stabilises.