1.6PowerSupply 1HardwareOverview
SatelliteL300D/L305D/SatelliteProL300D/EQUIUML300D/SATEGOL300DMainten anceManual 21
1.7Batteries
Thecomputerhasthefollowingfourtypesofbatteries:
MainBatteryPack
RealTimeClock(RTC)Battery
Table1-4liststhespecificationsofthesebatteries.
Table1-4BatterySpecifications
Battery Type Material Output
Voltage Capacity
MainBatteryPack
3 Cell Lithium Ion 10.8 V 2000 mAh
6 Cell Lithium Ion 10.8 V 4000 mAh
9 Cell Lithium Ion 10.8 V 6000 mAh
RTC Battery Lithium Ion 3.0 V 14 mAh
1.1.1 MainBattery
Themainbatterypackservesas thecomputer'smainpower sourcewhentheAC adapter
isnot  attached.  The main battery maintains the state of the computer so that it can
resumeit.
1.1.2 BatteryChargingControl
BatterychargingiscontrolledbyWINBONDWPCE775L.WhenACadapterandbattery
packare attachedto thecomputer, theWPCE775L controlsthe chargeon/off stateand
detectsafullcharge.
BatteryCharge
WhentheACadapter isattached,thebatteryis chargedbyoff-statechargewhen the
systemispoweredofforbyon-statechargewhenitispoweredon.