'Solar' really seems to be the buzzword in green tech at the moment, so I was interested to see that batteries are the latest electrical essential to get their own panels. 'Suncat' batteries (so-called because you charge them by leaving them to bask in the sun, like a sleepy cat) are still in embrionic form at the moment, and not available in the shops. But the good news is you can make your own, following instructions on DIY boff Knut Karlsen's blog.
You'll need to be able to source some photo voltaic cells to make your Suncats, but a quick glance at the tutorial suggests that's the hardest part of the job. [Via Treehugger, Shiny Shiny]
Related: More solar-powered phones hit the market | Be your own battery in a solar powered dress
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