Nikon has made firmware updates available for its D40 and D40x models.
The updates, v1.12 for the D40 and v.1.01 for the D40x, address battery performance with the EN-EL9a battery. Once installed, Nikon claims that the update allows approximately 510 shots in single shot mode and 2,400 shots on a continuous burst setting.
To download the update visit Nikon’s European website.