Best Buy has eBay has the Ring Solar Panel in black for $19.99 (regularly $49.99) with Free Shipping for a limited time.

Connect your Ring camera to an everlasting power source with this Ring solar panel. It hooks up to the Ring stick-up camera with a USB micro cable that can keep the camera charged with just a few hours of daylight. The Ring solar panel unit is weather resistant, making it suitable for most climates.