AUKEY Solar Portable Charger 20000mAh

https://www.amazon.co.uk/Portable-Charger-20000mAh-SunPower-Output/dp/B01LNAU4B0/ref=sr_1_2?ie=UTF8&qid=1491631269&sr=8-2&keywords=aukey+solar+panel+charger

A real workhorse! This has been on my boat, charging from the sun, sat on a shelf in a window, and it re-charged my iPad once and iPhone twice and was still on three blobs! Quite chunky and rounded - I've put wee non-slip feet on mine.