I bought my iPhone used so I didn't get a charger with it. I have an aftermarket charger and it works fine in the morning my phone is at 100%. However when I've charged my phone with the iPad charger in the morning it never updates the charging percentage. It always takes either a reboot or sometime halfway through the day it will update to a higher percentage. I would think the iPad charger being an Apple charger would work better than the aftermarket charger