About this replacement
Canon EOS-1D X Series — 10.8V Li-ion Replacement Battery (LP-E19)
This is a 10.8V, 2600mAh Li-ion replacement for the Canon LP-E19 battery. It fits the EOS-1D, 1DX, 1D X Mark II, and related bodies in the 1D series. The cell is rated at 28.08Wh and matches the physical dimensions and connector layout of the OEM pack.
- 1D series platform fit: Canon's EOS-1D line shares a common battery bay, connector pinout, and BMS communication protocol across the 1DX and 1D X Mark II bodies. All listed models draw from the same 10.8V rail, so one battery pack covers the full lineup without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a 1D X body. The BMS handshake completed on first install, shot count and battery-remaining percentage populated correctly, and the protection circuit held stable cutoff at the low-voltage threshold without tripping prematurely.
- First-cycle calibration on 1D series bodies: Canon's 1D X firmware maps the battery-remaining display against a charge curve it learns during the first full cycle. Run one complete charge through the OEM charger or in-body charge port before a shoot to let the camera calibrate the percentage readout accurately.
Canon BMS authentication check on LP-E19 replacement cells
Canon's professional bodies use a multi-pin communication handshake between the battery and the camera body. On a new third-party cell, the camera firmware sometimes flags the pack as unrecognised because the BMS hasn't completed its first authentication cycle. This is not a fault in the cell — it's the camera waiting for a charge event to validate the pack. Insert the battery, charge to full via the LC-E19 charger or an in-body charge port, then reinstall. After one complete charge cycle the camera accepts the cell and the battery icon displays normally.
Battery percentage jumping or reading 0% on a charged cell
The 1D X reads percentage by mapping measured cell voltage against a stored discharge curve. A new replacement cell has a slightly different discharge profile than the OEM, so the camera's voltage thresholds can misread — showing sudden jumps or dropping to zero before the cell is depleted. Running one full discharge and recharge cycle lets the camera recalibrate its threshold mapping. After that cycle, the readout tracks the actual remaining charge accurately down to roughly 11.1V before the low-battery warning triggers.