A bit light in autonomy, but helps out.
August SPC1500 Solar Charger and Battery with Universal Connectors for Mobile Phones and other music players with USB cable: 1500mAh capacity; Output 400 - 800mA 4
August SPC1500 Solar Charger and Battery with Universal Connectors for Mobile Phones and other music players with USB cable: 1500mAh capacity; Output 400 - 800mA
1500mA / h it is light, but it helps out when my N900 has no battery, which happens very often. It is also like a lamp that long. Its small size allows it to take anywhere. Too bad that no micro-USB connector is sold.