 "CANON 1133B001AA CB-2LX Battery Charger (1133B001AA)" (1133B001AA) from Solid Signal"
"The Canon CB-2LX Compact Battery Charger is designed to take full advantage of high capacity rechargeable batteries. It has been specially designed to charge the Canon NB-5L Battery." 
 "Canon BG-E16 - battery grip" " Canon grip 9130B001 Digital Camera Accessories CDW.com
"The battery grip BG-E16 features a variety of controls such as a shutter button, main dial, multi-controller, AF point selection button, AE/FE lock button, AF start button, and multifunction button making it ideal for vertical shooting." 