Nikon has released a firmware update for its D40 and D40x DSLRs. Version 1.12 for the D40 and Version 1.01 for the D40x improve compatibility of both cameras with Nikon's new EN-EL9a batteries. With the updated firmware, the D40 should deliver approximately 510 shots in single-frame shooting mode using the EN-EL9a, according to CIPA standard tests, rather than 470 with the original EN-EL9 pack.

Nikon D40 firmware updates:

Click here to download firmware v1.12 (Windows)

Click here to download firmware v1.12 (Mac)

Nikon D40X firmware updates:

Click here to download firmware v1.01 (Windows)

Click here to download firmware v1.01 (Mac)