Sometimes, products come along that are so simple, we have to wonder why people didn't come up with them sooner,  the Powerfreakz Evolution 2500 solar charger is one such product.On the face of it, the Evolution is an incredibly simple device that allows "up to four charges" of your portable devices from a single full charge of its on board battery.  The really unique thing about this product though, is that it features a solar battery that doesn't require direct sunlight, just a small amount of light to keep its battery charged, so for example, you could leave it on your office desk or window sill, or even on the passenger seat of your car if you are on the move and charge your phone/iPod whenever you need to, without worrying about getting to a mains outlet to use your conventional charger - Sounds ideal, but how will it perform?  Read on to find out...