iPhone 6 plus is far by the most sold Apple smartphone in Europe and North America in February and March and is able to dominate the high-class market due to its metallic body and many other great features.
Some users reported Battery Percentage Issue in their iPhone 6 and iPhone 6 plus.
Cause of the Battery Percentage Issue in iPhone 6 plus:
The main cause of people facing Battery Percentage Issue in iPhone 6 plus is due to restoring from their old iPhone backups lets say of their old iPhone 5 or iPhone 5s. This causes the battery timing and efficiency to reduce and it suddenly discharges.
More than 10 users reported that they restored their earlier iPhone 5 or iPhone 5s backup and this cause a battery timing problem for their iPhone 6 plus.
So, you can avoid from such a percentage issue that suddenly falls lets say 2% e.g. from 45% to 43% all of a sudden you need to install a fresh installation on an iPhone 6 plus.
What to do if you have already restored your iPhone 5 backup:
You can always do a factory reset and perform a new installation on your iPhone 6 plus. If you are facing from this problem, try this solution and let me know if it works, Have a good day.