Chosen Solution
Ive done a few of these in the past with no issues and felt super confident doing this again. I love my iPhone 6S Plus didn’t want to upgrade just due to the battery dying so quickly so I ordered the part and off i went replacing it. Being as careful as i am i referenced the steps a few times before beginning batter came out easy and new one went in same with 3 included adhesive strips. Took my time replacing connectors finished assembly back together but No Power plugged in for about 1 hour now and still no power! Could this be a battery issue? Thanks in advance for taking the time to respond.
If you have a multimeter you can probe the battery connector..it should read 3.6v and up if it’s working correctly. Without this basic testing it could be anything..if you still have your old working battery you may try that one too to see if it charges at all.