[SUPPORT] Want to charge k550L in emergencies

I've got an old k550L laptop as well as cell phones that use USBC. USA. It's easy enough to find battery packs that will charge to USBC but not as easy to find battery packs that have an AC port. Ideally I would find an adapter that would let me use a battery pack without the AC port. Can anyone give suggestions on how to solve this problem?