The OM System BCX1 is the dedicated battery charger for the BLX1. It can charge two batteries simultaneously in roughly 150min. The charger comes with an USBC port and can be either powered with the F7AC, which comes with the OM1, or with any other USBC 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.