30 minuten - 1 uur
iPhone 5s 64GB that wouldn't hold a charge; took it to an Apple Store and diagnostic indicated that battery was going bad. Was informed that the phone was bent so they wouldn't replace the battery. Only option was to purchase a replacement phone at $270 (with no guarantee that it would be a new iPhone and not a refurb) or purchase a new phone at full price (not an option on my limited budget). Figured I didn't have anything to loose and purchased a replacement battery kit from iFixit (part and tools) and downloaded the PDF of the steps needed to replace the battery.
Repair went very well; had a bit of trouble getting the top glass off due to the frame of the phone being bent, but just took a bit of patience and knowledge that I didn't have anything to loose at this point. Didn't get the battery adhesive fully removed, but heating the back of the phone with a hair dryer allowed for letting me get a plastic card under the battery and pull it up off the tape. Removing the left behind adhesive in the case was a snap and the new parts fit in with no issues. All the connections went back in to place with no issues and re-bent the frame back as close to true as possible to allow the front glass to fit back snugly. I don't have the best eyesight but with a good spotlight, it's not difficult to see all the connections. Was very ginger with disconnecting any cable connections - felt like I was working on defusing an explosive device lol - but the connections seemed to be able to take a bit of gentle force.
Suggest getting the iSclack tool if you have front or rear glass that isn't seated properly or a bent frame causing the glass to be a bit more difficult to separate from the frame.
Also suggest heating the back of the phone to soften and release the battery adhesive before trying to pull it up and out from under the original battery.