Chosen Solution
Just replaced my battery and screen and everything went well but now after charging it for 2 hours, once it reached 100%, I noticed that the back of the phone is bulging a tiny bit and the screen is bulging a tiny bit too… Did I get a defective battery from ifixit? Should I stop using my phone??
If your battery is Lithium (as most are for modern day cell phones) and it’s swelling (bulging), then you should take the item to your dealer and discuss this with them. If you don’t the battery could explode and/or catch fire. Lithium batteries on fire are extremely difficult to put out.
