Apple now has $29/£25 iPhone battery replacements available as an apology for its approach to handset slowdowns. But do you need to wait until your iPhone actually slows down before paying for a fresh power pack? Apparently not. MacRumors has confirmed an iGeneration report that Apple will replace the batteries on iPhone 6 or newer models whether or not they pass the usual diagnostic test (which recommends a replacement if the battery falls below 80 percent of its original capacity). In other words, you can go ahead if your phone just isn't lasting as long as it used to.