The hahnel procube twin dslr charger is the ultimate digital slr companion with the ability to charge 1 or 2 rechargeable dslr batteries and up to 4 x aa batteries simultaneously in a separate battery tray the sleek stylish contemporary metal design comes with intelligent charge control and an lcd display the procube comes with an integrated 21a usb charger for powering most usb devices such as an ipad iphone and samsung smartphones the hahnel procube twin dslr charger is compatible with