Re:Not really... (Score 3, Informative)

Motorola tried that with the Razr Maxx with is just a thicker Razr, with a bigger (3.3Ah) battery fitted in. The thickness difference is not much, but one can squeeze out five days of use out of the Maxx, which is better than most smartphones I know of but still not much when compared to oldies like the famous Nokia 3310.