Thumb Score: +10 Amazon [amazon.com] has Garmin Instinct 2S Solar: Smaller-Sized GPS Outdoor Watch w/ Solar Charging Capabilities, Multi-GNSS Support, Tracback Routing (40 MM) for $200. Shipping is free. Product Description from Amazon[list][*]Go longer than ever with solar charging that gives you unlimited battery life in smartwatch mode (assuming all-day wear with 3 hours per day outside in 50,000 lux conditions)