This large capacity battery grip is powered by two Battery Pack LP-E6, six AA-size/LR6 batteries or an optional AC Adapter Kit ACK-E6. It features a variety of operating controls such as shutter button, Main Dial, multi-controller, AF point selection button, AE lock/FE lock button, AF start button, and multi-function button. This is idea for high volume and easy vertical shooting.
Energizer - L91BP4 E2 Lithium AA Battery (4 Pack)
Lenmar - R2GAA4 Pre-Charged R2G AA Rechargeable Batteries 2150mAh