Pick: Netgear Arlo
Dick DeBartolo has a security cam that is completely wireless and doesn't need to be recharged. It's the Netgear Arlo, and it can run for 4 to 6 months before replacing the 4 CR123A batteries. The bottom of the Arlo is flat, so it can sit on a shelf, and it also has a magnetic attachment so it can be mounted at any angle on a wall. It can be used indoors or outdoors.
A kit with one camera is $179, but you can run up to 4 cameras with one base station. It also comes with night vision and 7 days of free cloud recordings.