Edit: apparently this is a very common form of Japanese storytelling called an isekai. There are 8 billion people in this world, no idea can be original. And sometimes you miss out on things many other people know. I’m clearly one of today’s lucky 10000.
Its been nine hours, i hope you havent died with my delayed response. Because, frankly, its very easy to charge your device. This applies to all electronic you might have had with you, so where you typically plug in the device all you do is touch that area and channel your magical power into it, this should come natural to you being in the new world. It goes at a good pace so dont worry time, but you do have to worry about your mana consumption, im sure you’re already aware of what happens when you run out…