The fastest way to charge your iPad
We took the four most common ways to charge an iPad: The iPad’s standard 10W charger, Griffin’s PowerBlock iPad charger, the iPhone’s standard power adapter, and via a MacBook Pro’s USB port. We timed how long it took to bring the battery up to 80%, which is the standard baseline for a “quick” charge. That last 20% goes very slowly to preserve battery life, so doing total time wouldn’t give a fair indication of the charging method.
If you’re interested in learning more about charging your iPad, I recommend you give this post a read.