Solar Powered Big Piggy Power Bank by Neon Green. Rechargeable back-up battery collects and stores energy from the sun for future uses. Features an 800mA lithium battery that charges when left in the sun’s direct rays or when connected to the USB port of your computer. Connects with the iPhone, iPod, Blackberry, most mobile phones and MP3 players. Fully charged when left in the sun for 15-16 hours or 2-3 hours by USB power. Connecting cables not included.