https://www.theverge.com/circuitbreaker/2018/5/16/17362546/caviar-4500-iphone-x-tesla-solar-charger

A Russian accessory maker named Caviar has started selling a solar-powered version of the iPhone X going for $4,500. Caviar is branding the phone the iPhone X “Tesla” and it initially announced its plans back in November, as spotted by AppleInsider.

Since Caviar makes neither iPhones nor Teslas, the iPhone X Tesla’s functions aren’t built directly into the device. Instead, the iPhone X Tesla is actually a pretty thick phone case that attaches directly onto the device, with a solar panel on the back that powers a secondary battery for additional juice. Caviar claims the case has IP67 water and dust resistance.