The new Li-ion rechargeable battery EN-EL25a battery I mentioned in my previous post is already listed on Nikon’s official website:
Nikon Li-ion rechargeable battery EN-EL25a
This is a rechargeable battery pack that can be used for a long time with one full charge. It can be charged and used repeatedly with a dedicated battery charger.
Compatible products:
*To use the Li-ion rechargeable battery EN-EL25a, please update your camera’s firmware to the latest version.
Additional information:
Source: Nikon (thanks Hans!)