The 3rd generation iPad came with a built-in 42.5-watt-hour rechargeable lithium-polymer battery, compared to iPad’s 25-watt-hour rechargeable lithium-polymer battery. It was a whopping 70% increase in the capacity of the battery.
Apple engineers were forced to pack a significantly larger battery in the iPad 3, which came with a faster dual-core processor, Retina Display and support for 4G LTE networks, to offer the 10-hour battery life.
But the downside was that it took much longer to charge the iPad 3 with the 10W power adapter compared to the iPad 2. Apple seems to have addressed this issue with the launch of the 4th generation iPad, which comes with a 12W power adapter. The 4th generation iPad also comes with a built-in 42.5-watt-hour rechargeable lithium-polymer battery.
9to5Mac reports that Apple has confirmed that the 12W power adapter will charge the iPads faster than the older 10W power adapter.
When we asked Apple about the 12W adapters, we were told the following:
“We don’t have an exact percentage of how much faster it would charge but you should see an increase in speed.”
Apple is also selling the 12W power adapters for $19, so you can grab one for your 3rd generation iPad. It is compatible with iPad 2, iPad 3, iPad 4, iPhone 4S, iPhone 5, 5th generation iPod touch, 7th generation iPod nano and iPad mini.