Anker Power Bank, 20,000mAh Travel Essential Portable Charger with Built-in USB-C Cable, 3-Port 87W Max Fast Charging Battery Pack, for MacBook, iPhone 16/15 Series, Samsung, Switch, and More

https://a.co/d/0cntwRDAthis one has been great for me and i can fit it into a switch case. Maybe 1.5-2 full charges for my switch 2? If you can find it on sale its really a great portable charger, I use it for my Macbook when I have class all day.