10 - 30 minuten
Battery life shorter and shorter--frequent recharges
I watched a few YouTube videos and read stories on the iFixit website. I was a bit intimidated at the warnings about the "floating" ground piece, the warnings about metal contacting the inside of the phone, and the infamous "searching" lock up after battery replacement. (BTW, iFixit's own video on this replacement shows the removal of the ground but never mentions it again.) The torx and Phillips screwdrivers in the kit worked perfectly, and using fine tweezers I got all screws out. Prying the battery with the plastic tool was a bit difficult, but taking it slowly it came right out. Realignment of the ground piece only a bit tricky. Everything else 1-2-3. Glad that I had read the helpful comments about the "searching" lock up problem, and I performed a "Network Reset" after new battery installation and everything was fine.
I would recommend that iFixit highlight the Network Reset step on its website as part of the installation; I had to scroll through many stories before I just happened upon this hint.