This MB-N10 Multi-Power Battery Pack from Nikon offers extended battery life when working with select Z-Series mirrorless cameras. It accepts two additional EN-EL15b lithium-ion batteries, with separate slots for each one, to increase the camera s battery life by approximately 180%. The dual battery slots permit hot swapping of the batteries while the camera is in use, which eliminates downtime if recording longer takes or extended time-lapse sequences. It is also dust and moisture resistant to match the design of the camera and it supports in-grip charging when using the EH-7P charging AC adapter.