The Wasabi Power BTR-BPENEL9-JWP-009 battery replaces the Nikon EN-EL9 battery pack. This battery features 1300mAh which provides a longer run-time between charges. It is made with premium Japanese cells to provide maximum battery life and also comes with a 3-year manufacturer warranty. Rechargeable lithium-ion battery for Nikon EN-EL14 and D5000 Premium Japanese cells for longer battery life with no memory effect Rated at 7.4V and 1300mAh for a longer run time than the Nikon original Includes battery with 3-year manufacturer warranty