This is a 12-cell Li-Ion battery. The battery recharges while it is installed and the computer is connected to AC power.
Closely monitor the battery charge. When the battery charge gets low, change the battery or connect to AC power immediately to prevent losing any unsaved work.
If your notebook unexpectedly goes into Standby mode while you are using it but the battery charge is not low, you may need to recalibrate your battery. You should also recalibrate the battery periodically to maintain the accuracy of the battery gauge. To locate the instructions for recalibrating your battery, select your notebook type from our Support Documents page, and then click FAQs.