 "Canon LP-E4N - camera battery Li-Ion" " Canon Li-Ion 5751B002 Digital Camera Batteries CDW.com
"The LP-E4N battery pack is a rechargeable Lithium-ion battery. The battery pack also communicates with these cameras so that you can check the remaining charge, shutter count, and recharge performance in the camera's power source info screen." 
 "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." 