Your Nikon Digital SLR is like a mini-computer with a lens. The battery must power the LCD monitor the motorized zoom autofocus mechanism metering system electronic flash and more. A spare rechargeable battery is an essential accessory. No power no pictures! The EN-EL14 Battery powers camera for approximately 200 pictures per charge and can be recharged repeatedly using the compatible battery charger MH-24. Key Features: Genuine Nikon Brand Battery Pack. With constant shooting flash usage image review and playback especially when you have access to additional memory your standard battery alone will not usually be sufficient. Providing an extra 1030mAh of power this spare EN-EL14 will not put constraints on how you want to shoot. A battery loses power in cold weather and can become too cold to operate the camera. Keeping a spare battery warm in your pocket to maximize battery power and periodically switching the cold battery for the warm one can significantly enhance battery performance. Memory Free! This EN-EL14 can be charged at any time without harm even if it already has a partial charge and can be typically charged over 1000 times.