The MB-D10 expands the capabilities of the Nikon D300. You can use two EN-EL3e batteries to double your shooting or use a high-capacity EN-EL4a battery to get over 3,000 shots per charge and increase the maximum frame rate from 6 fps to 8 fps. For added peice of mind, the grip comes with the MS-D10, allowing you to use eight AA alkaline batteries for backup or in situations where there is no place to recharge. The grip also provides a more comfortable and stable hold both in landscape and portrait orientations.
MB-D10 Multi-Power Battery Pack for D300 Includes:
MS-D10EN for use with EN-EL3e battery (sold separately)
and
MS-D10 for use with 8 AA batteries (not included; accepts 1.5 V LR-6 (Alkaline), Lithium (FR6), Ni-MH (HR6) or Ni-Mn (ZR6))
Can use EN-EL4/EN-EL4A (sold separately) with optional BL-3 Battery Chamber Cover
EN-EL4/EN-EL4a batteries require BL-3 Battery Chamber Cover sold separately.
EN-EL4a/EN-EL4 and AA batteries support higher frame advance rates (8 Frames per second in the D300) than the EN-EL3e.