20 - 30 minutos
My phone started shutting off all of a sudden around 50% and my calibration would not work. I figured that it might be the battery not holding charges and maybe something wrong with the chip in the battery.
It was fairly easy. I was extra careful not to bend the wire bands too much, but I watched the video later and I was probably being overly careful. I had a little problem with pulling out the battery. Prying it with the tool that came with the battery resulted in it breaking.
Definitely go for it.