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I have to change my iPhone 7 battery, and I have all the tool from iFixIt to do so I just have to buy the battery but I wonder if I can take the “part only” because I don’t know if adhesive strips are included, or if I need to take the fix kit even if I already have all the tools, just to get the adhesive strip… I really need for sure, thanks in advance for your help!

Hello Pascal, take a look: iPhone 6/6s/7 Battery Adhesive Strips Sometimes, brand new battery has a strips. It cost circa 2-3$ everywhere.

I’m pretty sure it comes with the part, but I would still double check. What I wanted to tell you, though, is that you can likely get the adhesive a lot cheaper than buying the fix kit.