Extend your shooting time with the Nikon EN-EL18c Rechargeable Lithium-Ion Battery and BL-5 Cover Kit from B&H Photo. The BL-5 Battery Chamber Cover connects to the EN-EL18b pack and allows it to be inserted into the MB-D12, MB-D17, and MB-D18 battery grips for the D800, D800E, D810, D810A, D500, and D850 DSLR cameras. As the EN-EL18c is more powerful than the pack that is normally used in the grip, it will allow you to capture more images per charge.
The Nikon EN-EL 18c Rechargeable Battery has a capacity of 2500mAh, an output of 10.8V, and provides 27Wh. The battery can be charged in a MH-26a or MH-26aAK charger and used as a replacement battery for the Nikon D5, D4S, and the D4.
The BL-5 Battery Chamber Cover from Nikon is a battery chamber cover that's used with the MB-D12, MB-D17, and MB-D18 Battery Packs and enables the use of an EN-EL18 series rechargeable lithium-ion battery to power the camera.
MB-D17 (D500)
MB-D18 (D850)