About 4-5 years ago I got an iPhone 7 through my work but since my iPhone 6 was still good, I decided to just keep the 7 in the box as a backup and wait until I actually needed to upgrade. I figured now was a good time to make the switch considering the apps require the newer iOS versions which are able to run on the 7.
So I opened the box and plugged in the phone to charge. I knew the battery would be dead since it had been in the box for years. The phone flashed the Apple logo on and off repeatedly. I let it charge for a couple hours and then tried to turn it on. Unfortunately when pressing the power button, I could not get it to turn on. Even trying every solution such as doing a full restart did not work.
I figured the battery was probably completely dead and needed to be replaced. This is normal for phones that are many years old so I was not surprised by this. So I made an appointment to bring it in to the Apple store.
At the store I explained the situation to them about how it was a new phone that had been unused for many years and would not start up. They tested it out and were not able to detect a current. I asked if we should replace the battery but they said even with a new battery it still probably won't work. This was pretty disappointing to hear.
They said there really is not anything they can do at this point to fix it and wanted to know if I was interested in buying a new phone and giving them my phone to recycle. Considering it was a brand new phone I just unboxed, I told them I better hold on to it and that I was not ready to buy a new one since my old phone still worked.
So I took the phone home and decided to do some more research. There were some suggestions about trying to heat up the phone to bring it back to life. Apparently with the lithium batteries if the power drains too low, they sort of disconnect or something as a safety feature. I tried warming it up as suggested but unfortunately it did not work.
I thought about bringing it back to Apple again for a 2nd opinion and just asking them to do a battery replacement. Then just for the heck of it, I started looking up how much replacement batteries cost. They go for about $20 and this is including a full tool kit. Apple charges $50 for the replacement.
The tutorials online didn't look to hard so I figured I would give it a try since I didn't really have anything to lose. It would be a fun project and a good experience trying to change an iPhone battery.
So I ordered the battery with the kit. When it arrived I got to work. Honestly, replacing the battery turned out to be more difficult than I expected. The screws are extremely tiny and there are 3 different kinds. Just prying the screen away from the base was incredibly difficult since it is sealed on there with and adhesive. Still I was determined to get it done.
I followed the steps and managed to get through it in about 2 hours. Keep in mind, with all of this, there was still no guarantee it would work even if I did everything right.
Then came the moment of truth. I plugged it in to the charger and after a second, the Apple logo came on. That's a good sign! Then after a few moments the start up screen appeared. It worked!
So it was just the battery after all just as I had suspected. Right away I was pretty annoyed by my experience at the Apple store since they told me nothing could be done to save it and that a new battery would not help. They wanted me to recycle the phone and spend hundreds of dollars on a new one, when all it needed was a $20 battery.
So if you have a new phone that has been in the box or unused for many years and it does not turn on, chances are it may just need a new battery.