Theoretically, these new batteries do not need to be drained to get and hold a good charge. Also, a new battery actually improves it capabilities as it's used during the first couple of weeks. And, you can't "overcharge" the batteries either. Very low maintenance.
As always, keeping the screen brightness low, locking the screen after a couple minutes of non-use, turning off the GPS unless needed, and other such power-conserving actions really DO make a difference. Also, remember, the screen is THE major drain on power.