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1.5 Power Supply 1 Hardware Overview
Satellite P200D/P205D Series Maintenance Manual 1-11
Battery charging control
• The EC controls the following.
– The quick charging ON/OFF
– The detection of full charge
Detection of the low battery
• The EC detects the low battery point by the gas gauge.
– LB10M: The system will be driven by the battery for 12 more minutes.
– LB0: The battery won’t be able to drive the system after 3 minutes.
– LB1: The battery can drive the system only during the suspend process.
– LB2: The battery cannot drive the system.
New battery installation
• When a new battery is installed, the EC communicates with the E
2
PROM in the
battery to read information of the newly installed battery.
Battery capacity calculation
• The EC reads battery remaining and percentage capacity from the battery
through SMBus.