The Nikon MH-34 Battery Charger is a wall charger specifically designed for charging EN-EL15b and EN-EL15c lithium-ion batteries. The MH-34 needs to connect to an EH-8P AC adapter, EH7P charging AC adapter, or third-party AC adapter that supports USB power delivery. To use the MH-34 with an EH-8P AC adapter, you will need a separately purchased UCE25 USB cable.