misenko said:I'm not sure it is normal to charge 12! hours to fully recharge. Most probably you're using adaptor from iPhone and not the one for iPad. IPad adaptor is 2A so if you are using only 1A adaptor it will take twice a time to recharge. Normal recharging time for iPad2 is around 5 - 6 hours.
f4780y said:Remember the iPad3 battery is significantly larger than the 2. It does take a good deal longer to charge. Apple haven't changed the laws of physics, just the size of the battery by +70%.