I've got 4 Arlo cameras and love them. 1 inside and 3 outside. I love that I can look at what's going on at my house while I'm away. I can look on my iPhone or Mac Air or iPad. Now the batteries aren't cheap at all and I only use the camera's when I'm gone. If you are gone and use the cameras 3 months total or less a year, you can get by on one set of batteries a year. Each camera takes 4 batteries.
Most of the newer Arlo systems have rechargeable batteries. I am looking into one of their systems as well.
Interesting. I need to check to make sure I can't use rechargeable.