Specification:

The 5D multi-power battery pack holds 2 EN-EL3e Lithium-ion rechargeable batteries, effectively doubling your total shooting time
Can also hold a AA battery holder (included), so users can use AA batteries as a power backup
The 5D multi-power battery pack provides an AF-on button, vertical firing release with lock, and front and rear command dials
Brand: Eigday
Dimensions (H x W x L): 111 x 149.1 x 75.7 inches, 1.13 pounds
Runs on either one or two EN-EL3e batteries or six AA-size batteries
Works with AA-size alkaline, nickel metal hydride (Ni-MH), lithium, and nickel-manganese batteries
Provides added stability with extended shooting potential