1￿HARDWARE￿OVERVIEW￿ Error!￿Use￿the￿Home￿tab￿to￿apply￿￿￿￿2￿to￿the￿text￿that￿you￿want￿to￿ appear￿here.￿Error!￿Use￿the￿Home￿tab￿to￿apply￿￿￿￿2￿to￿the￿text￿that￿you￿want￿to￿appear￿here.￿￿

1.5￿ Batteries￿

The￿computer￿has￿the￿following￿two￿types￿of￿batteries:￿

￿￿ Main￿Battery￿Pack￿

￿￿ Real￿Time￿Clock￿(RTC)￿Battery￿

￿

1.5.1￿ 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￿when￿the￿AC￿adapter￿is￿detached.￿

￿

1.5.2￿ Battery￿Charging￿Control￿

Battery￿charging￿is￿controlled￿by￿EC￿KB926.￿When￿the￿AC￿adapter￿and￿battery￿pack￿are￿attached￿ to￿the￿computer,￿the￿EC￿KB926￿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.￿

￿

Table￿1-3￿Quick/Normal￿Charging￿Time￿

State￿

Charge￿Time￿

Off-State￿Charge￿

3/6/12￿Cell￿

About￿4￿hours￿max￿

On-State￿Charge￿

3/6/12￿Cell￿

About￿12￿hours￿max￿

￿

￿

SATELLITE￿L550￿MAINTENANCE￿MANUAL￿

1-14￿

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Toshiba PROL550 manual Batteries, MainBattery, BatteryChargingControl, BatteryCharge, 3Quick/NormalChargingTime