20 - 30 minutos
So, all of a sudden my phone starting shutting off randomly, no matter how much charge it held. I put up with it for a few days, but then eventually it shut off and even when plugging it in to charge it, the phone would not charge, and I simply could no longer turn the phone on. I searched the internet and found ifixit.com and decided I should probably replace the battery.
Repair was easy! Just follow the instructions and you should be able to figure it out. Took me about a half hour and now my phone works like brand new!
Make sure you keep all the little tiny screws separate from each other so you know which ones go back where when you put the phone back together. I also used a safety pin to get the sim card tray out - worked great.