When I was planning my latest trip to Japan, I gave a lot of thought to what to bring for trading. I wasn't planning on daytrading during the trip, so I just needed to check the markets once or twice a day and enter/exit some slow swing and position trades. I also wanted to travel light as I'd be bouncing around locations a bit.
In the end, I settled on the Asus c302ca Chromebook. This is like a budget laptop that only runs the chrome browser. I don't trade directly off it (though my TastyWorks account would be fine for that). Instead, I use Chrome Remote Desktop and Splashtop to remotely access my home Windows machine. There, I can pull up complex options trades and do analytics as well as run various scans and python apps.
There are a lot of advantages to the chromebook over a full Windows laptop. First, it's very cheap. If it gets lost or damaged, I can pick up a new one anywhere. If it gets stolen, I can relax as the internal storage is fully encrypted and all my work is synced with the cloud. After signing into a new chromebook with my Google account, within minutes I am up and running. The battery life is also much better than any comparably priced/sized laptop.
Another thing about this specific model is it uses usb-c. I've been migrating my other equipment to this (external drives, dock, etc) so that's appealing. But more than that, this chromebook charges off usb-c. So does my phone (Moto Z). So, on my last trip, I just brought one very small charger and used it for both devices. It's significantly smaller than any laptop charger I've had to travel with before.
The device is also a 2-in-1, so it doubled as my tablet and I left my kindle behind. On the long flight over, I could flip it to tent mode and watch movies on it's full-HD screen.
Anyway, back to trading. It worked like a dream. I did find the Splashtop remote desktop to be faster and more comfortable, but you need the business version so there is a small monthly fee for that. I also used the built-in Chrome remote desktop and it was fine in Japan where internet is quite fast. The screen is 1080p so I set my home desktop to 1080p also before leaving and found it adequate for my charting/analysis needs. Correction: the screen can go higher than 1080p, but since it is a 12.5 inch screen, 1080 is a comfortable size for the Windows desktop.
You can find it on amazon at http://a.co/f6X50VR