Spending legions of your time is Facebook is nothing new and nor is it soaking up much of your battery life.Tests have now revealed that the social media site's app does actually chew up battery life on Android devices, and just iPhones.In tests carried out by Samuel Gibbs at The Guardian, it was found that by simply using an app 'wrapper', which loads programmes much faster, it could save battery power by around 20 per cent a week.A 'wrapper' is when a programme loads full apps like Facebook...
