I have the same policy. It's not worth risking your life just to save a bit of money or try some gadget that is only made by a no-name brand. Often you keep these devices very close to your body or head (e.g. earphones) where they can do a lot of damage if they suddenly explode.

I learned this lesson over 10 years ago when I was visiting a night market in China with someone. He was so delighted with how cheap the portable chargers were that he bought a bunch to give to his friends/family back home. When we returned to the hotel one of them started emitting smoke. From that day I've only ever bought reputable brands, and even then I worry about it.