BG-E4 Grip power supply
-The BG-E4 is a vertical hand held power supply that gives access to all essential functions, with usage that is the same as in horizontal mode.
-An optional strap, the E-1 equally exists for an easier hand position.
-The BG-E4 battery adaptor is an indispensable complement to the optimisation of the battery life of your EOS-5D.
Canon BG-E4 Grip power supply. Battery technology: Lithium-Ion (Li-Ion), Color of product: Black, Compatible products: BP-511, 511A, 512, 514 Lithium-ion battery packs