Also, if you have already found this problem and paid for a battery replacement out of your own pocket, Apple will refund you. It's not the first issue the firm has had to address in recent weeks, which was the iPhone 6 Plus' "Touch Disease." That's where a flickering gray bar appears across the top of the screen and multitouch issues render the device unusable until fully repaired. Although, in that case, the company still wants $149 for its trouble -- you don't manage to get $231.5 billion in your back pocket being generous.