Laptop Battery

  Battery types :
              Ni-Cd (Nickel Cadmium) batteries
              Nickel metal hydrate batteries
              Lithium (Li) ion batteries
              Lithium (Li) polymer batteries


 Battery Properties:
             Voltage  : 9.6 V
             Current  : 3800 mA (milli Ampere)
     (These values are mostly used. May vary in some batteries).


 Safety Circuit :
            One popular question arises in everyone's mind. "What happens if my laptop is being plugged in power socket even after it has been fully charged ?" .
            Practically speaking we cannot unplug the charger pin, as soon as battery gets fully charged. Here comes the safety circuit. Safety circuit is made up of PTC(Positive Temperature Coefficient). It is one kind of thermistor. Thermistor's resistance value depends upon temperature. PTC has a property, where resistance value is directly proportional to temperature (i.e  as temperature increases resistance also increases and as temperature decreases resistance also decreases). 
             The safety circuit has three different stages :
                         - Starting stage
                         - Charging stage
                         - Cut-off stage 
             The third stage (cut-off stage) helps the extra power to be grounded preventing the current from not entering the battery.
             So now no worries. 
                     "Just plug and play".
             Thanks to the safety circuit.    


For more details : chancer.bone@gmail.com