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 and alternative buttons for shutter release and ae lockaf lock that make vertical shooting more comfortable approximately 2 500 shots with one en el3e and approx 5 000 shots with two en el3e batteries designed for the nikon d80 and d90