It is all well and good escaping to the countryside every now and then to recharge our batteries, but it’s a fact of modern life that most of the things we have become so reliant on need more than just some burnt sausages and warm beer to keep their batteries charged. If you want to share photos of your sun burn on social media or continue to annoy your friends by playing the same album over and over on your portable speaker, you will need something to fill your devices with juice.