The new iPad has the lagest battery, which can supports 10 hour for your daily use, however, it will takes some more time to charge, moreover according to comments made by DisplayMate President Ray Soneira to iLounge, the new iPad continues charging for up to one hour after it reports a full 100% charge.
In iLounge's testing, the new iPad switches from a lightning bolt ("still charging") to plug ("done charging") battery icon 5 to 10 minutes after reaching 100%; Soneira confirmed that the iPad still charges even when it claims to have been filled.
iLounge also found issues with reported battery drain.
The third-generation iPad sometimes reporting a battery loss of just two percent over the first hour of testing, then averaging 10% of loss each hour afterwards while performing the same tasks.
It's unclear why this might be happening, the site suggests that perhaps Apple has taken a few liberties with reported battery levels to make it seem like the new iPad charges faster and drains slower.