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Battery charging and discharging sequence
The battery charging and discharging sequence varies when both the
primary battery and optional accessory battery are installed.
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The computer supports Fast Charge Mode (enabled at the factory).
When both batteries are charging, the primary battery will charge to
90 percent before the accessory battery begins charging. Charging
is then switched to the accessory battery. When the accessory
battery reaches 90 percent, the primary battery will then charge to
100 percent. After the primary battery is completely charged, the
accessory battery will charge to 100 percent.
●
When the accessory battery reaches a critical battery level, battery
power is transferred to the primary battery.
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The accessory battery will discharge before the primary battery
discharges.
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When the accessory battery is removed from the computer, battery
power is transferred to the primary battery.
●
When the accessory battery is inserted in the computer, battery
power is transferred to the accessory battery.
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