The SolarStrap is a thin and lightweight solar panel on a wearable badge. It’s made in Finland by Suntrica and weighs about 2 ounces. It’s easy to put the SolarStrap on any bag, backpack or shirt thanks to a folding tab. It stores solar energy in a small battery, than can be used to charge up your cellphone, iPod or any other gadget. It retails for about $40.