Chosen Solution
I replaced my iPhone 6s battery after ordering a new one from ifixit.com. After following instructions to the T and a good install with no problems I plugged my phone in and charged as per the instructions. After removing the phone from the charger it was once again dead after 4-5 hours with no use and will not charge again. Had I have known that it would react the same way as the old battery I would have immediately backed it up on my computer! I was waiting to sync it as instructed before backing up. Please Help!!!
@johnkangta is right about a short. From experience with the 6s the faulty component will be the Wi-Fi IC or one of the two charging IC’s. For retrieving your data I would suggest purchasing a new battery than use a program called 3uTools it is a free program that will back up your phone without the need to sync with iTunes so it will be a lot quicker. Retrieving your data is your first priority so don’t mess with the phone till you have the new battery. Another thing you could consider is looking for a shop around your area that sells batteries and ask them if they could supply one that is fully charged or better still buy a battery test and charge board and use the battery you already purchased. They are only about $10 and this will ensure you have plenty of charge for retrieving your data.
Did it show charging after the battery was replaced? did you try a different cable or walk wort
The issues is “your phone is shorted" no matter how much battery you buy will be drained to 0.01V or to 0V so when the battery is less than 2.6V will not charging symbol but sometimes will show apple logo then black screen repeatedly once connected to charger…..so let the short fixed first YOU WILL ENJOY THE
