iSolar Portable Folding Solar Kit for Ipad/tablets Great for In-Outdoor activities, Camping, Emergency & Rescue, Education, Home, Park, or Recreation Applications. Light weight, foldable. Fits in most car dashboard. 20W lithium battery will provide additional 8 hours of iPad use. 10 W Foldable Solar Panel, with 20W lithium rechargeable battery, Built-in MPPT controller, increases solar charging power efficiency up to 90% Takes 3 - 4 hrs of full-sun condition to charge the 20W lithium battery, 1 Year Warranty