The nikon MB-D80 Multi-Power Battery, Pack holds 2 EN-EL3e Lithium-Ion
rechargeable batteries - effectively doubling your total shooting time or can
hold a AA Battery, Holder (included) so users can use AA batteries as a power
backup. The MB-D80 Multi-Power Battery, Pack affords an AF-on button, vertical
firing release with lock and front and rear command dials.