Chosen Solution
Hi, i have an iPhone 6 with strange issue! the battrey discharges fast and once it dies compltly, it won’t get charged again! I have repleaced the battrey couple of times and same issue so i know its not the battrey. What is the issue? how do i fix this? Thanks for the help, i’m lost and stuck!!
If you have replaced the battery and you are confident that the batteries are good (can you test them in another device?), then I believe your problem is with the charging circuit (U2/Tristar). This requires a micro-soldering repair and is not DIY unless you have the proper tools and experience.
