It sounds like it changed now with more battery cameras becoming available but I always found it funny that wireless security cameras used to mean they run on wifi but you still need to provide power to them. Because usually it's pretty easy to get a network cable to it and it's getting power to it that's the problem.
I haven't done it, but heard you can run power over ethernet.
That is actually quite common. POE is the acronym you are looking for on the spec sheet. most times you need a switch that supports it.
some equipment comes with adapters if your network isn't set for it.
But at some point a wire is a wire to pull. be it power or eithernet.
