Mini Portable Bi-Color LED Fill Light 3000k-6500k Adjustable Brightness Built-in 3000mah Battery for Mobile Phones, Cameras, Camcorders

SKU: GW51.0063

A
It can be charged when in use, but the maximum brightness available in the charged state is 70% due to battery charge protection 
A
Yes, it can run indefinitely after being plugged in.