Chosen Solution
I bought a replacement battery from this same website and when I installed it my phone would not boot up anymore. It would stay on the apple logo for about 3 seconds then turn off. This was repeated until phone was disconnected from power.
deplete the battery all the way on your phone. then take the screen off, take your battery out, hold the power button down for about 30 seconds. install the battery again, put your screen back on and test it. also please verify your phone model compared to what you purchased. If you have a 6s make sure your buying a 6s battery if it doesnt work return it.
