Macworld Premium smartphone manufacturers have been steadily improving battery life for years, and Apple is no exception. In fact, if you only look at the improvement of the current iPhones compared to last year’s models, you may not realize just how far they’ve come. The battery in today’s new iPhones lasts several times longer than that of the iPhone X introduced just seven years ago! Fortunately, we have been testing iPhone battery life in the same way since then, so we wanted to illustrate just how much better iPhone battery life has become. iPhone battery life over the yearsWe have tested…