The BCX-1 is the dedicated battery charger for the BLX-1. It can charge two batteries simultaneously in roughly 150min. The charger comes with an USB-C port and can be either powered with the F-7AC, which comes with the OM-1, or with any other USB-C mains adapter, which delivers at least 27 watts or 9V with 3A. As it is Power Delivery compliant you can use also a powerbank which is Power Delivery 3.0 compatible to charge your batteries on the go.