The new LP-E19 battery pack is the same size and shape, along with the same electrical contacts, as previous EOS-1D-series batteries. So if you use battery packs for the EOS-1D Mark III or Mark IV, EOS-1Ds Mark III, or the EOS-1D X, you re in luck: There s extensive back-and-forth battery and even charging compatibility.
LP-E19 battery pack
Can be used in EOS-1D X Mark II
Can be used in previous EOS-1Ds Mark III, EOS-1D Mark III, EOS-1D Mark IV, and EOS-1D X
Should be be charged with new LC-E19 charger (with red stripe on charger s top surface)
If charged with LC-E4, LC-E4N chargers the battery won't charge fully, and 1D X II will only run at 12fps.
LP-E4 and LP-E4N battery packs for EOS-1D series
Can be used in EOS-1D X Mark II (Note: EOS-1D X Mark II maximum shooting speed will drop to approximately 12 fps)
Can be used in previous EOS-1Ds Mark III, EOS-1D Mark III, EOS-1D Mark IV, and EOS-1D X
Can be charged with any of the battery chargers for EOS-1D series: LC-E4, LC-E4N or the new LC-E19 charger