Nikon MB-D18 Multi Power Battery Pack (D850)
The MB-D18 Multi Battery Power Pack can be powered either by six AA batteries (Alkaline or Ni-MH or Lithium), EN-EL15 or EN-EL18b rechargeable Li-ion batteries. To use the MB-D18 with AA batteries, use the MS-D12 AA Battery Holder. When using EN-EL15 batteries to power the MB-D18, use the MS-D12EN Battery Holder. When using an EN-EL18b battery to power the MB-D18, use the BL-5 battery chamber cover.
The MB-D18 is equipped with a shutter-release button, AE/AF lock button, multi selector, and main- and sub-command dials for improved operation when taking photographs in portrait (tall) orientation.
Fits like it grew there.
I have battery grips for all my cameras. The new MB-D18 is expensive but I don't have to worry about 3rd party compatibility issues. Thanks to pictureline for the alert it was in stock. I live in CT but travel to SLC several times a year to work. Always stop by the store to chat with the knowledgeable and friendly staff and attend whatever seminars they may be hosting.