I have an LED light that came with no power supply, only a USB-A connection for power. I had it connected to a wall wart, then this morning i noticed it was noticably dimmer than usual. So i plugged it into my Anker charger and it was bright again.

So i am looking for another wall wart, but is one that is a charger fine? Or do I need to seek out one for power?

Edit fixed the title