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Alienware Area-51 m9750 Technical Reference
Chapter 2 - Battery
Battery Pack
Your notebook is equipped with a high-energy rechargeable Lithium Ion (Li-Ion)
battery pack. Battery life will vary depending on the product configuration, product
model, applications loaded on the product, power management settings of the
product, and product features used by the customer. As with all batteries, the
maximum capacity of this battery will decrease with time and usage.
Recharging The Battery Pack
Your notebook supports both on-line and off-line recharge. Follow the procedure
below to recharge battery:
• Make sure the battery pack is installed in the notebook.
• Connect the AC adapter to the notebook and to an electrical outlet.
The two System LEDs are available to reflect the system status as well as the battery
status. For details on the System LEDs, please refer to Chapter 1.3. When the
notebook is OFF, a depleted Li-Ion battery will take three hours to recharge.
Questions and Answers:
Q: I can feel a mild heat next to the battery pack. Is this normal?
A: The battery will generate heat during recharging and discharging. There is a
protection circuit inside the notebook to prevent overheating. You do
not need to worry.
Q: My battery operation time is not as long as it should be. Why?
A: The battery is heat sensitive and can only be charged to its maximum if the
battery and its environmental temperature remain within 15-25°C (59-77°F).
The more the temperature deviates from this range during recharging, the
less chance there is for the battery to be fully charged. In order to recharge
the pack to its full capacity, users are requested to cool down the unit
by unplugging the AC Adapter. Wait until it is cooled down. Then plug
in the AC Adapter to start recharging again.
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