One of the glossed-over truths about “wireless” home security cameras is most aren’t truly wire free. While they don’t need to be tethered to your router, many still need to be plugged into an electrical outlet, which can significantly limit their placement. The Reolink Keen, a full-HD (1080p) pan-and-tilt camera, rectifies this by running exclusively on battery power.
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https://www.techhive.com/article/3202067/security-cameras/reolink-keen-review-a-truly-wireless-security-camera.html
