Never lose power again with this solar generated backpack. This Backpack is built tough for use as a weekend hike bag or as a large daypack. Three solar panels are tough, light weight, waterproof, and generate up to 4 watts of power. Solar panel powers internal rechargeable battery. When not in the sun, the battery can be charged using the AC travel charger or DC car charger. The adaptor plugs comes in universal sizes and for common cell phones, which eliminate the need to use a car charger for common devices And it comes with wires throughout the bag taking power to the shoulder strap for headphones. Also includes a cell phone pouch located on the shoulder, along with an eyeglass pouch inside for your convenience. Comes with 11 standard adaptors including a car charger socket and USB adaptor so you can always use a standard charger for your device. Plus 1,850 cubic inches of storage space for the rest of your supplies. Grate for emergency and camping needs.