Nikon D300 Complete Manual page 93

The optional MB-D10 comes with two trays: one that allows you to
use eight AA batteries to power the camera (shown above), and
one that allows you to insert EN-EL3e batteries. Moreover, there's
an optional adapter, the BL-3, that allows you to use EN-EL4
batteries (from the D2 series and D3).
The MB-D10 can hold one EN-EL3e battery, eight AA
batteries (alkaline, NiMH, or lithium), or one EN-EL4 or EN-
EL4a battery.
To use the MB-D10:
õ
1. Mount the MB-D10 to the D300 body.
a. Remove the rubber cap covering the contacts
on the D300's camera bottom and place it in
the recess on the top of the MB-D10.
b. Remove the plastic cap from the MB-D10's
connectors and slide the MB-D10 onto the
bottom of the D300. As you do this, make sure
that the tripod socket and outer alignment tabs
on the MB-D10 are going onto the D300
correctly. Do not twist the MB-D10 in relation
Thom Hogan's Complete Guide to the Nikon D300
V1.02
Page 93