Specifications

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Battery Charging
The battery packs begin charging anytime your computer is connected to AC power
using the AC adapter.
If the standard battery pack is fully discharged and your computer is turned off or in
System hibernate, it fully recharges in about 2 hours.
If the standard battery pack is fully discharged and your computer is turned on, it
fully recharges in about 4 hours.
If an optional secondary battery is installed in to the drive bay, it will be charged
together with the standard battery. In this case, the standard battery is charged first;
then, an optional secondary battery is charged.
If the standard and an optional secondary battery are fully discharged and your
computer is turned off or in System hibernate, they fully recharge in about 5 hours.
If the standard and an optional secondary battery are fully discharged and your
computer is turned on, the charging time may vary depending on usage.
Your computer monitors the internal temperature of the unit. If the
unit gets critically hot, battery charging (which generates some heat)
is interrupted until the temperature decreases. This can account for
slightly longer battery charging times.
You can track the charging status of the battery pack using the battery indicator
located next to the power indicator. The battery charge indicator shows the following
conditions:
Tri-color (green/red/orange) Battery Indicator
Icon Lamp State Status
Turned on orange Battery is charging
Turned on green Battery is fully charged
Turned on red Battery low warning
Flashing red Critical battery warning
Flashing orange
Abnormal condition – for
example the battery may be
installed incorrectly