, Harlequin wrote

My 12" tablet with the extended battery can get 7+ hours of life. Yeah, this 20" tablet is big, but this day and age, not having a battery life of 10+ hours on a thing like this unacceptable.

 

I think it is aimed at living in one spot in your house - but the battery gives it some valuable portability in other rooms.  More battery life=more weight so it is a trade off IMO