If your iPhone 6 plus battery is not holding a charge or not charging there may be fault with the charging port / lightning connector.
The charging dock of your iPhone 6 Plus is a very important component as it allows you to sync and charge your iPhone. Because it’s being used every day for charging it is susceptible to wear and tear. After a while it may stop working and this could also be caused by liquid corrosion.
Why you will need this repair
Your iPhone doesn’t charge your battery?
The computer doesn’t detect your iPhone when connected
Your iPhone has a loose connection and you have to wiggle the charging cable in order for it to start charging.