I think some of the guys on here have been a bit harsh on you. Its not wrong to want a long battery life, in fact, its a good thing, it saves you having to charge it all the time, useful for long periods of time without an outlet (vacation, hike, etc) and depending how you look at it; save power, overall longevity of the device, etc, etc.
But, like the others have said, android works differently which im sure you are aware of. All the small details amount to a lot, take out widgets or adjust the refresh time, go to sync and check your accounts. If its your battery, then get betterbatterystats and see if some processes are keeping the tab awake otherwise, like above, turn the wifi off when the screen turns off.
I hardly have widgets and have set the wifi to turn off, it lasts a long time whilst its off. Trust me, its much better than it used to be on some of the previous versions of Android, ha.