The Canon LC-E4N Twin Battery Charger recharges the new LP-E4N battery for the EOS 1D X as well as LP-E4 batteries. This is the only charger than should be used with the new LPE4N battery: if it is charged in an LC-E4 charger you will not fully charge the battery; instead it will only reach around 90% charge so your capacity is reduced and it will not meet new safety regulations. However, an LP-E4 can be charged in the LCE4N battery charger with no problems.
Compatible with the following Canon EOS DSLR cameras
EOS 1D Mark III / 1Ds Mark III / 1D Mark IV / 1D X /