Reolink Argus 2

Reolink Argus 2 is a 100% wire-free security camera that works on WiFi. You can place the security camera wherever you need it, indoor and outdoor.

It's weatherproof, it has motion detection and also night vision up to 33 feet.

The Reolink app provides data about battery's life, displays the power consumption and provides tips on how to extend battery life.
The app is available for Android, iOS, Mac and Windows.

It also has a built-in mic and speaker so you can listen and talk.

It provides 1080p Full HD images and videos and it has 130 degree wide viewing angle.

It comes with a rechargeable battery and lets you know when the battery is running low. You can get live view on your smartphone and real-time alerts.

Conclusions:
Pros: Rechargable battery, with solar panel option, completely wireless
Cons: Lacks smart home integration