Portable Solar Power USB Battery Charger for MP3 Phone Black

• Solar converts energy, compact and lightweight
• Compatible with iPhone, iPod most digital devices
• 0.5W Panel, 1250mAh battery
• USB cord included
• Battery type: Lithium-polymer

Purchased this product and followed the instructions, it takes 4 hours to charge and only charges my iphone 40%. The worst part is the solar powered part does not seem to even be powerful enough to charge the battery let alone my phone so its almost useless.