Yesterday I suddenly developed problems charging my iPad. Overnight it only charged from 2% to 16% and it is losing percentage points rapidly whether it's plugged into the charger or not. I have the original wall adapter but replaced the cable with a generic one. I only ever charge it from a wall outlet. I have tried a hard reset and soft reset a couple times. It says it's charging but i have to fiddle with the cable a bit for it to say it's charging. Any ideas what's wrong and how I can fix it? I've had the iPad for about 10 months btw.