Well treo due tend to have shorter battery life than most phones. The best thing you could do is get an alternative battery. There are two right now. First one is the 2400mahz which offers 33% more time than the defualt. Next there is a 3200mahz (which requires a special case(which is included)) which offers 77% more time over the default battery.
Getting alternative battery will increase the weight and make the device a little warmer over long term use.
You could also get extra chargers if you don't want to get an extra battery.
You could get a car charger, office charger, and etc.
Look at the ET store for more details on the products.
*NOTE: some of the alternative batteries might not support the 680 yet, but will soon* |