- Apple confirms iPhones with older batteries will take hits in performanceThe Verge
- Apple admits it slows older iPhones — to prevent battery issuesCNET
- Apple responds to reports of worn batteries forcing iPhone CPU slowdownsAppleInsider (press release) (blog)
- PSA: iPhone slow? Try replacing your battery! : iphone – RedditReddit
- iPhone 6, 6s sudden shutdown? We’ve almost fully cured issue with iOS 10.2.1, says AppleZDNet