The iPhone 6 and 6 Plus this year come with larger batteries compared to last year’s 5S. Larger batteries also usually mean longer charging times. However there is a neat trick to charge your phone quicker.
Some tests with the standard iPhone charger and iPad charger found that the iPhone 6 is now able to draw 12W instead of the regular 5W. This means it can charge at a quicker rate and draw more power.
However you run the risk of using an unauthorised charger then that could destroy your battery or even your device.