Battery security cameras are excellent alternatives to wired security cameras. No long wires, no installation issues, and a big cut from the electricity bill. Most batteries last for months before they have to be changed which takes ticks off constant maintenance problems. Most security cameras use rechargeable batteries. These battery packs usually come with the camera and are quite cheap if bought separately. What’s great is - a few packs of these can help last a few months (on ideal usage) and you can switch between them easily.