... GPS, DV, MP3, MP4 Solar charger,solar energy charger for mobile phone, digital camera, PDA, PSP, GPS, DV, MP3, MP4 ... built-in high-capacity rechargeable lithium battery (900mAh above, different specifications of different models with optional lithium batteries);4. Output ... the circuit will be built-in lithium battery power through the output interface for mobile phones, digital cameras, MP3, MP4 ...