The MB-D80 battery pack adds extended shooting capability in an ergonomic design that adds shooting stability. Able to run on either one or two EN-EL3e batteries or six AA-size batteries*, it also features additional command dials & alternative buttons for shutter release & AE-Lock/AF-Lock that make vertical shooting more comfortable. Approx. 2, 500 shots with one EN-EL3e & approx. 5, 000 shots with two EN-EL3e batteries. * Compatible AA-size batteries comprise alkaline, Ni-MH, lithium & nickel-manganese batteries.