D.C. power has voltage drop over distance, to overcome this using a 12 volt power supply to a 5 volt regulator at camera end takes care of this very well. I have 4 cameras wired this way for several years on V2’s and now I have replaced those with V3’s.
12 volt input to 5 volt output micro-USB cable (adapter)
12 volt power supply 1 amp with connector adapter
Edit: My longest run is 188 feet from 12volt wall transformer to 5volt micro-USB regulator/camera