I have an Anker Prime 100w GaN charger in my bag, as well as an Inui 2700Mah 140w (100whr) battery pack and a 100w 12v auto adapter for travel, works great.
Coupled with an Asus Rog Ally X handheld PC and my phone, i can fly, offload and lightly edit in Premiere Pro, offload to cell and upload to Youtube or wherever, mobile. It all fits in a small backpack with my filters, batteries, and prop protectors plus space for water, mics, etc.
And i did just that in Greece earlier this month. Its an incredibly compact, versatile and capable little setup.