The Nikon Rechargeable Lithium-Ion Battery Pack EN-EL20a is one of the most reliable batteries to emerge in recent times. It not only supplies powerful and long-lasting power to your high-end digital cameras, but also maintains its charge for a considerable period, thus negating the hassle of continually charging your digital camera battery. It delivers a highly impressive 1110 mAh input power supply to your camera, which allows you to perform all your shooting functions devoid of any interruption and with utmost ease. This rechargeable lithium-ion battery is also adept at comfortable handling any voltage fluctuations or electric spikes, which protects your expensive digital cameras from circuit damage in the long run. The EN-EL20a battery ably resists water, moisture, and harsh weather changes, which prolongs its lifespan. Although, the Nikon EN-EL20a Rechargeable Lithium-Ion Battery Pack is compatible with a few select Nikon digital cameras, it works best with the Nikon 1 V3.