Unless the cheap transformer in the supply failed, and the charger started pumping wall current into the charger. Here's one disassembly of a crappy charger htt

Unless the cheap transformer in the supply failed, and the charger started pumping wall current into the charger. Here's one disassembly of a crappy charger https://www.youtube.com/watch?v=afePhiXpsoA https://www.youtube.com/watch?v=afePhiXpsoA