The award winning Solio Solar Universal Charger is an ingenious mobile phone charger that is suitable for charging most mobile phones including the Apple iPhone, Apple iPod and others.
The Solio Solar Universal Charger stores power provided by the sun or socket enabling you to charge your mobile device anywhere and any time. Furthermore a fully charged Solio can recharge your mobile device not once but twice.
There are three ways a Solio can be charged directly from the sun which takes 8-10 hours, directly from the mains which takes approximately 5 hours, or via a car cigarette lighter point for emergency top ups, and costs just $19.95.
Source – mobilefun
This seems to be the only charger you would ever need, so long as the sun is always shining!