iPhone 15 periodically refusing to charge

I (thought I) was charging my iPhone 15. When I saw it had 1%, I was really confused, and it ended up dying on me. I plugged and unplugged before it died and finally, I went to try and use a magsafe charger. Still wouldn't work. I tried with different cords and it still wouldn't charge. I knew it wasn't charging because it was the red battery with the location indicator at the bottom. If it was dead and charging, it would just show the red battery. Anyways, now it's starting to charge, which really confuses me. It did not charge with my specific cord (the one it CAME WITH), and did not charge with the magsafe charger (also apple). But now it's charging on an old USB-C cable? Wtf is going on?