For gadget lovers looking to go green, consider the Solio Classic 2 hybrid solar charger.
Its large battery size can simultaneously power multiple devices, including smartphones, tablets, e-readers, GPS watches and pretty much any USB-powered electronic. The Classic 2 has more battery capacity and larger solar panels than the original version, meaning a day of direct sunlight is all it needs to generate three full charges for most popular smartphones.
Not a sunny day? The Classic 2 battery can be recharged via a micro-USB port, as well. It sells for $100 on Solio's website.