The lc e4n battery charger will charge two separate lp e4n battery packs at a rate of 120 minutes per battery the charger plugs directly into ac outlets and includes a cb 570 cable adapter which can be plugged into a dc car socket when in use the charger performs battery capacity calibration so that the remaining battery level can be indicated accurately when used in the eos 1d x camera battery charger charges two separate lp e4n battery packs charge rate of 120 minutes per battery for eos