High soalr energy transform efficiency: over than 17%. Solar panel: 5.0V/60mA (Max) Polycrystalline silicon panel or Mono-crystalline silicon panel (optional). High capacity build in polymer battery: 1000mAh. Output voltage: 5.5V. Output current: 350-800mAh. To charge build in battery in the charger using computer or AC adapter about 3-5 hours. High efficiency. You can gain 120-180 minutes' talking time or 72 hours standby time for charging your phone only 60 minutes. Environmental-friendly, and energy-saving. Stylish design, plastic shell, small size and easy taking. Adopt the most advanced protection IC and can prevented from overcharge, over discharge and short-circuit, which can prolong the life of your battery and more safely. Fits for Nokia, Samsung, Motorola, LG, Sony ericsson, digital camera, DV, PDA, MP3, MP4, iPod, GPS, etc.