Apple’s iPad has already gone through four revisions, with a fifth iPad likely to be launched soon. As well as its superb design and easy-to-use software, it also lasts longer than most tablets, with Apple claiming 10 hours of battery life, even for the newer models with Retina screens. Compared to an iPhone , the iPad needs more power to charge it, which is why Apple includes a beefier power supply in the box. The iPhone charger produces 1A, but the iPad version kicks out 2.1A. You can still use an iPhone charger (shown below) to charge your iPad, but it will take around twice as long compared to using the 2.1A charger. If this isn’t the reason your iPad is charging slowly, bear in mind that it does take a long time to fully charge an iPad from 0% to 100%. The iPad 2 takes around 4 hours using the official Apple charger, which is a fair amount of time, but since the iPad 3 and 4 have roughly 70% more capacity in their batteries, they take around 7 hours to char...
Logic will get you from A to B. Imagination will take you everywhere. - Albert Einstein