Black Mini Solar Charger With Backup Battery For Cell Phone, iPod, iPhone, HTC, MP3 and more USB port for phones with USB charging, Compatible with: mobile phones, digital cameras, PDAs, MP3/4 players. Charging adapter cables for Nokia, Motorola, Samsung and Sony Ericsson phones included. Full Charges in 2-4 hours (AC adapter/USB cable) or 10-15 hours (Under Solar Light). Built-in 1350mAH Li-on rechargeable battery . Dimensions: approx. 9.2 x 4.5cm.