5 - 10 minutos
had a warning from apple to service my battery. so i googled it and found a widget called istat pro and this app told me how much percentage the batteries life has got left. so i waited till about 50% then finally this battery was in stock so i bought it
very easy i got it in the mail and something came up so i took my laptop with me and the removal kit where i had to go and proceeded with the repair in my car
dont be scared. its pretty easy!! and instead of 20min of battery from full charge it becomes like you just opened the box!!