You have to understand that, it doesn’t matter how good you care about your laptop battery, it will lose performance and one day it will die.Charging notebook computer batteries used to be easy in the good old days of Nickel Cadmium system and lead acid cell batteries. All you had to do was build a circuit that would adjust the voltage in such a way that the charging current did not exceed 50% of the notebook battery’s milliAmp hour (mAh) capacity. A couple of hours later you had a charged laptop computer battery. A few milliAmps above or below the maximum capacity were easily tolerated, with only a slight degradation in the overall life of notebook computer batteries.  Read more...