The Fireluke Solo Tank and the Freemax Maxus Solo 100W Kit, which are both part of the Maxus Solo 100W Kit, are run by an external 18650/20700/21700 battery and are charged with a 5V/2A USB Type-C cable. https://www.vapeuniverse.co/products/freemax-maxus-solo-100w-kit?pr_prod_strat=pinned&pr_rec_id=e6b2d54b5&pr_rec_pid=7846675808508&pr_ref_pid=8190000234748&pr_seq=uniform