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User’s Manual
Retaining data with power off
When you turn off your computer with fully charged batteries, the batteries retain data for the following approximate time periods:
Battery pack (6 cell) | about 2 | days (Standby mode) |
| about 30 | days (Shutdown mode) |
Battery pack (12 cell) | about 4 | days (Standby mode) |
| about 60 | days (Shutdown mode) |
RTC battery | about 2 | months |
Extending battery life
To maximize the life of your battery pack:
❑At least once a month, disconnect the computer from a power source and operate it on battery power until the battery pack fully discharges. Before doing so, follow the steps below.
1.Turn off the computer’s power.
2.Disconnect the AC adaptor and turn on the computer’s power. If it does not turn on go to step 4.
3.Operate the computer on battery power for five minutes. If the battery pack has at least five minutes of operating time, continue operating until the battery pack is fully discharged. If the battery LED flashes or there is some other warning to indicate a low battery, go to step 4.
4.Connect the AC adaptor to the computer and the power cord to a power outlet. The DC IN LED should glow blue, and the Battery LED should glow amber to indicate that the battery pack is being charged. If the DC IN indicator does not glow, power is not being supplied. Check the con- nections for the AC adaptor and power cord.
5.Charge the battery pack until the Battery LED glows blue.
❑If you have extra battery packs, rotate their use.
❑If you will not be using the system for an extended period, more than one month, remove the battery pack.
❑Disconnect the AC adaptor when the battery is fully charged. Overcharging makes the battery hot and shortens life.
❑If you are not going to use the computer for more than eight hours, discon- nect the AC adaptor.
❑Store spare battery packs in a cool dry place out of direct sunlight.
