Nikon D850 - Optional MB-D18 Battery Packs; Parts of the MB-D18

299
The MB-D18 takes one EN-EL15a or EN-EL18b rechargeable
battery or eight AA batteries (alkaline, Ni-MH, or lithium) and
features controls for taking pictures in “tall” (portrait)
orientation: shutter-release, AF-ON, and Fn buttons, a multi
selector, and main and sub-command dials.
Parts of the MB-D18
Optional MB-D18 Battery Packs
2
8
9
11
10
1
3
5
4
12
6
7
15
14
16
17
13
1 Contact cover holder .................302
2 AF-ON button ................................301
3 Main command dial ...................301
4 Multi selector...............................301
5 Attachment wheel......................302
6 Holder power connector
cover .............................................307
7 Battery-chamber cover .............304
8 Battery chamber .........................304
9 Battery-chamber latch .............. 304
10 Power/signal contacts............... 302
11 Contact cap .................................. 302
12 Mounting screw.......................... 302
13 Fn button ...................................... 301
14 Shutter-release button.............. 301
15 Control lock.................................. 301
16 Sub-command dial .................... 301
17 Tripod socket