The MH-34 is a battery charger. It is compatible with the EN-EL15c and EN-EL15b Lithium-ion batteries. The MH-34 needs to connect to an EH-8P AC adapter, EH-7P charging AC adapter, or third-party AC adapters that support USB PowerDelivery. To use the MH-34 with an EH-8P AC adapter, you will need a UC-E25 USB cable (available separately).
*Note: The MH-34 battery charger cannot be used to charge EN-EL15a or EN-EL15 Lithium-ion batteries.