Nikon ENEL15a Rechargeable Li-ion Battery

The Nikon EN-EL15a is the official rechargeable lithium-ion battery designed to power a wide range of Nikon DSLR cameras, from the enthusiast-level D7100 and D7500 to professional-grade bodies like the D810 and D500. As a genuine Nikon accessory, it is engineered to communicate seamlessly with the camera's power management system, providing accurate charge level readings and consistent output throughout a full day of shooting. The key upgrade over its predecessor, the EN-EL15, is the addition of in-camera USB charging capability on supported bodies, which means you can top off the battery without removing it from the camera — a practical advantage when traveling light.

Built with lithium-ion chemistry, the EN-EL15a delivers stable voltage output that doesn't taper off as the charge depletes, helping maintain consistent autofocus and burst shooting performance until the battery is nearly empty. It is fully backwards compatible with cameras originally designed for the EN-EL15, making it a straightforward upgrade for photographers looking to modernize their power setup. Whether you're shooting a long event, working in the field, or simply want a reliable spare to keep in your bag, the EN-EL15a provides the dependable power that Nikon shooters expect from an OEM accessory.