Despite the fact that a large 400,000-volt power-line crosses the festival site, finding a plug to charge your mobile phone is unsurprisingly difficult. That’s why I normally go for the multi-battery option, packing five fully charged backups last time.

Trouble is, that clashes somewhat with the environmentally friendly message of Glastonbury Festival. Encouraging the production of yet more … <reads battery label> … lithium-ion does not help the health of Mother Earth. So this year I’m trying something new.

solio

This is the Solio: a device that charges your mobile phone, iPod, PDA or “any handheld mobile device” (so they say) from the sun. It sounds like a fantastic idea – you charge up the internal battery in the day and then transfer the electricity into your phone.

I had hoped to review it in more detail. Unfortunately I’ve realised that the one I bought has got a rubbish internal battery that can’t even charge my phone once whereas it should be good for about one-and-a-half charges.

So this one is going back to the shop and I’ll let you know what the replacement is like.