This battery will only work in an iPhone 7 Plus. It will not work in an iPhone 7. Be sure you have identified your iPhone correctly.
Replace that old, dead or dying battery with a brand new one!
For optimal performance, calibrate your newly installed battery: Drain battery below 10%, then charge uninterrupted to 100%.
Note: the new “Battery Health” feature of most batteries in the current iOS Version is not compatible with this aftermarket battery. The battery will perform properly but iOS will not report on its health. The battery bar that displays how much charge you have left still works properly as well.
Fix Kit contents:
Brand new iPhone 7 Plus Replacement battery
Kit Bit Driver
iFixit 4 mm Screwdriver Bit Pentalobe P2
iFixit 4 mm Screwdriver Bit Phillips #000
iFixit 4 mm Screwdriver Bit Tri-point Y000
Tweezers / Angled / Pro / ESD
iFixit Opening Tool
iFixit Opening Pick
iPhone 6 Plus/6s Plus/7 Plus Battery Adhesive Strips