Still, it’s probably worth it – both for the environment and for pure convenience – because we all know that mobile batteries have a habit of dying at the worst possible moment. This Japanese solution works in the same way as nay wind-up device, crank it up for power, or more precisely, wind it up for three minutes for eight minutes of extra talk time.
It comes with adaptors for any model of phone and retails for the equivalent of just over £8, which sounds like value to me.
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Via Shiny Shiny