TOOGOO Portable Solar Charger for iPhone/iPod/MP3/Mobiles Pre-charged and ready to use Built-in rechargeable polymer lithium battery -Note it is not fully compatible with iPhone 3GS: 800mAh Battery charged by computer/laptop (cable included) or AC adaptor (not included) 60% Pre-charged.14 hours for iPods, 1.5 hr for GPS Provides extra power up to: 35hrs for mobile phones