MB-D18 Multi-Power Battery Pack
Designed for use with the D850 DSLR, the MB-D18 Multi-Power Battery Pack from Nikon offers both enhanced handling capabilities as well as extended battery life. It accepts one additional EN-EL15 lithium-ion battery pack to increase the camera's battery life or, alternatively, eight AA batteries can be used in conjunction with the included MS-D12 AA Battery Holder. There is also the option to use an EN-EL18a/b battery in conjunction with an optional BL-5 Battery Chamber Cover to achieve a faster 9 fps shooting rate and approximate battery life of 5140 shots per charge.
The physical design of the grip improves shooting in the vertical orientation and also provides an overall more ergonomic structure for holding the D850. An additional shutter release button, AE/AF lock button, multi selector, and main- and sub-command dials are all incorporated into the grip's design to benefit more natural and intuitive handling.