I have a Grab & Go Portable Desk Lamp.is it SAFE to use the USB power source while the three (3) AA non-rechargeable batteries are installed in the unit??
Yes because the light does not charge or attempt to charge installed batteries. The USB is simply an additional power source.
I bought my grab & go desk lamp at a retailer, but I don't know which one. Who retails this lamp?
This light is in limited supply. The best place to get one is https://litezall.com/products/litezall-black-and-red-led-desk-lamp