Chosen Solution
I ordered batteries for two Iphone 6 and a replacement screen for one. Installation was a snap. One Iphone powered right up the other didn’t . Put it on charger for over an hour still nothing. Took it apart to check all connections, no issue there. Placed back on charger for another hour, still nothing. Is it possible I got a defective replacement battery in order #1760760-731343?
Try putting the “defective” replacement battery in the phone that boots up properly. If the problem follows the battery, then you have a defective battery. If the problem stays with the same phone, then you may have accidentally damaged something during your repair. In that case, check the connectors (battery & screen) to see if there is any damage.
It is very well possible that you got a defective battery. iPhones typically require a functioning battery to boot up and with a defective battery you typically don’t get your phone to boot. I would ask for a refund and another replacement battery and see if that works out. Update (10/23/2018) If you do have a computer running macOS you could test the battery. How to test an iPhone’s Battery Update (10/23/2018) Nevermind, you cannot test the battery even if you do have a computer running macOS because your phone doesn’t power on.
