The 40W foldable solar panel is designed for mobile camping and long trips where you need more power without sacrificing portability. Key benefits Reliable on‑the‑go charging: provides solar power outdoors to keep essential devices powered when you are away from outlets. Direct charging from sunlight: can charge directly to USB devices such as cell phones, USB fans, flashlights, tablets, watches, headphones, and other medium‑small USB devices. Portable and lightweight: compact foldable design and light weight let you easily squeeze it into a backpack for easy transport. Simple operation: unfold, angle toward the sun, and connect to start powering your devices. Note: this folding solar panel cannot store electricity. Specifications and performance Power: 40W foldable solar panel Compatibility: charges a range of mediumsmall USB devices directly in sunlight Portability: small size and light weight for easy packing in backpacks Usage: unfold, position toward the sun, and connect to compatible USB devices Use scenarios Camping and hiking trips: keep phones, lights, and small USB devices powered during multiday outings. Road trips and vanlife: provide supplemental charging for devices when away from traditional power sources. Emergency preparedness and outages: maintain essential device power during unexpected events, without relying on stored batteries. Note: this folding solar panel does not store electricity; it only provides charging when exposed to sunlight.