The Garmin fnix 9 Pro Solar pairs a titanium case with a solar-charging lens, so time outside adds runtime instead of draining it. The reflective display reads clearly in direct sun without needing a backlight to fight the glare, and extended exposure can push battery life well past what the cell alone would deliver. The same titanium bezel and dive rating carry over from the Pro AMOLED build, with the solar lens doing the rest of the work. What Our Gearhead(R) Experts Are Saying:"I went two weeks in the backcountry without touching a charger. As long as I get some daylight on my wrist, the battery just doesn't become a problem."