According to MacRumors, Apple won’t have iPhone 6 Plus replacement batteries in stock until late March to early April.
Apple says the replacement batteries are in short supply and won't be available for weeks in the U.S. and other regions, according to an internal document distributed to Apple Stores and Apple Authorized Service Providers this week and obtained by MacRumors. The doc quotes a shorter wait of "approximately two weeks" for iPhone 6 and iPhone 6s Plus battery replacements, and adds that batteries for all other models like the iPhone 6s, iPhone 7, iPhone 7 Plus, and iPhone SE are expected to be available "without extended delays" in most countries.
Last month Apple published an apology letter to customers in regards to “Batterygate” for slowing down older phones to compensate for erratic battery performance. The tech giant is offering $29 replacement batteries for those with an iPhone 6 or later. The discount, which represents a $50 savings, starts in late January and ends in December 2018. Apple will also add more battery health information to iOS to let users know when the battery begins to compromise performance.