... for Mobile Phone,MP3,MP4,Digital Camera; Accept Customer Logo. Portable Solar Charger: a) Solar cells: 5.7v 75mab) Input ... Time: Mobile phone 2-3 hours, MP3 20 hours.h) Smart protection chip: over-charging protection, over-discharge protection, overload ... bus or ship, in the fieldwork, etc. It is a portable, environmental-friendly, light-weight, flexible, durable and versatile charging product ...