I’m using a powerbank, Anker powercore 3 elite 25600 mah 87w, which is supposedly is one of the best and reliable powerbanks money could buy. It didn’t came with the power brick though, so I couldn’t charge it beforehand, so I had to whip abit more than I’ve anticipated on a power brick aswell, maybe abit pricy thing, but it won’t explode in process atleast. Allegedly, it’s 8-10+ hours of power via PB, but I haven’t tested that yet, joggling between bunch of different personal issues and projects

Thanks, also, forgot to mention, if anyone need’s a detailed text / poorly drawn mspaint guide on how I’ve built that, let me know. As this is 3d printerLESS build, anyone can replicate it, I wish to make a video someday on how to build it step by step.