Act as a product designer with 5+ years of experience in sustainable tech. Design a sleek, modern portable solar charger with built-in energy usage analytics. The charger should feature [high-efficiency solar panels], a [compact, foldable design], and a [real-time energy tracking display]. Highlight its durability for outdoor use, such as hiking or camping, and emphasize its ability to charge [smartphones, tablets, and small laptops]. Include visual details like a [matte black finish with LED indicators] and a [USB-C + wireless charging combo]. Render the product in a [sunlit outdoor setting] to showcase its functionality. Use Midjourney to create a photorealistic image with vibrant colors and sharp details, focusing on the charger's innovative features and eco-friendly appeal.