20 - 30 Minuten
Much cheaper for me to do it....battery was slowly going bad
decent ....took almost an hour
Directions are pretty good...though an early heads up to keeping screws apart would have helped. Also the part by the instructions by the "do not remove this sticker....I found confusing....there was a tab that needed to be pryed up to expose the do not remove sticker.....then it was being really careful thru out...