I'm wondering how long iPad 2018 takes to charge from zero all the way up to 100% ?? Today I plugged it in and it had 45% of charge left. I checked the time, it was 4:47pm. When I unplugged it at 6:57pm, battery percentage had climbed to 96%, so it took my iPad 2 hours and 10 minutes, for its battery percentage to move from 45 to 96. 130 minutes for a 51% increase. I wonder if it's normal?
