Battery-operated Dimmer Switch recommendation?

[MEarly]

I would look into Lutron Caseta and Pico

It looks like there’s a recent integration:

Official Lutron Caseta Support in SmartThings (Beginning March 2017)

I received the following email. Check your email and keep an eye out for ST announcements. Caseta Wireless March 2017 Special Announcement The Lutron Caséta and SAMSUNG SmartThings systems now work together to bring convenience and versatility to your fingertips. With the Samsung SmartThings family of smart home products, you can control your Caséta system in new ways and bring the convenience of motion sensing automation to your home. Caseta Pico Dimmer Bridge Discover ways to use SmartThings devices with Caséta controls and other smart home products. • Use a SmartThings Motion Sensor with Caséta dimmers to turn your outdoor lights on when someone is at your front door. • Place a SmartThings Multipurpose Sensor on a walk-in closet door to automatically turn lights on when opened…