Battery Time Extender For Symbian

cellplugin.com/2010/03/battery-time-extender.html

I have been using Nokia 1661 for a while now; it is a simple to use with decent functionalities (Radio my favourite), I mean what everyone expects from a cell phone it truly does. However my only concern is related to its battery life, I mean it drains too early. Is any one else who is facing the same issue or is it some sort of manufacturing defect in my handset. As it is really annoying that I have to charge it too often. I would like to replace this as it is now getting on my nerves.