One of the main reasons why I still pick my DS Lite over the PSP is the long battery life, where the former clearly trounces the latter despite me having to sacrifice gorgeous graphics in my portable gaming titles. Despite that, how about keeping the DS Lite juiced up at all times without you having to search for a nearby power outlet? That is possible although you will need a steady hand and have a love for all things DIY with this solar-powered DS Lite. Instructables has a step-by-step guide on concocting your own version, although bear in mind the device's screen is not too big a fan of being played outdoors as the colors will look washed out.
Source: Technabob