Nah. I think it’s the UA security people that need to get out more and learn battery powered bags aren’t a widely known thing. (Why would a bag even need a battery??)
They are very normal on new luggage. Every major luggage company has a powered line and has for many years. Can charge a phone on the go for example.
I’ve never heard of it before. Sounds odd to me. With a separate power bank you could easily move it between bags and decide for yourself if you want to carry its weight.
They’re removable and replaceable and incredibly light weight