raspberrypi

Here's a link to the Tesla story, there's plenty more if you search on google. I don't know 100% how it works, looks similar to your issue where voltage irregularities cause odd behaviour.

As for the power supply vs charger thing. I have not looked around that hard to determine if using a charger like this is a super bad thing to do. I suppose low quality chargers and power supplies could be delivering dirty power which could cause issues or shorten the lifespan of the device. Power supplies are also more designed to run for long periods of time. It depends on how much you want to spend.,