This is a solar panel with built in battery pack.
It uses a 1.2 Watt (240mA) monocrystalline panel using the latest generation of 22% high efficiency panel, resulting in a smaller package with better performance in low light. It is designed to be charged from a USB socket and topped up in sunny weather to extend battery life, but the panel is not large enough to let you rely purely on sunlight to power a device. Most similar size solar packs have a smaller solar panel with less than 1 Watt / 200mA of power, many do not even state the power of the panel.
Built-in 6000mAh battery - this can be fully charged in as little as 8 hours from a mains socket This stores enough power to fully charge most smartphones 2-3x, and also works with satnavs, Bluetooth devices and other small gadgets. It can be used with a partial charge and while its being charged from the panel, will keep its charge for over 6 months and can be recharged 500+ times. 4 LEDs let you know how much power is remaining in the pack.
Compatibility Since the pack uses a universal-spec USB socket, it can charge almost any device which charges from a USB socket or 5V mains charger. This includes all iPhones, Smartphones from Samsung, HTC, Nokia, Etc, and satnavs from Tomtom, Garmin, Etc. A USB cable with Apple, Micro USB and Mini USB connectors is included to charge the battery and your devices, you can also use the USB cable supplied with your device.
Specifications 1.2 Watt (5V 240mA) 22% Efficiency monocrystalline panel, Micro USB input, 2100mA USB output, 6000mAh Li-Polymer battery, 186g weight, 12.7cm x 8cm x 1.6cm, 100cm USB Cable.
Alternatives - This charger uses a relatively large battery with a relatively small solar panel, designed to be charged from a mains socket and topped up in sunny weather to extend battery life. PortaPow offers a range of products for different scenarios:
PortaPow Battery Packs - no solar panel, just a battery pack. If you're not expecting much Sun.
PortaPow 6000mAh Battery + 1.2W Solar Panel - If you want a high capacity battery with a top up from sunlight.
PortaPow 3000mAh Battery + 3W Solar Panel - Lets you rely on sunny weather with a top up from a mains charger.
PortaPow Solar Panels - A range of high power panels starting from 3 Watts to charge your gadgets directly from the Sun, a much lighter and more efficient design than charging via a battery pack resulting in faster charging. You can still use battery pack to store power till its needed.