This gadget isn’t just a green device – it’s also a handy spare battery. You charge up the device’s lithium ion cells over USB or with the detachable solar panels (the former is quicker in grey and gloomy UK) and use it to top up various handheld devices. 11 different connectors are included, which cater for a wide range of the most popular gadgets, including Nokia, LG, Samsung and Sony phones, plus iPods and any device that connects via USB or mini-USB. Our only gripe is that the connection between the panels and the device feels a tad flimsy – green gizmos are counter-productive if they end up in landfill after a few months, after all. Still, the idea of a carbon-neutral iPod is reassuring – even if the reality is unlikely on all but the sunniest days.

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