my first playthrough of this game was entirely played on a 7-hour car-ride back and forth. Using a BESTEK 300W car power inverter, i was able to have my wii u plugged in, and i would just play the game exclusively on the gamepad
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that's actually flippin sicc
I did something similar, except I had got this wall-power battery pack meant for camping, and jerryrigged it to my wii u in a bookbag, so during lunch at highschool I could play botw portably. Good times.