Other Power Management Issues; Battery Charge Level And Power Management; Table 7-4. Low Battery Modes - Fujitsu Stylistic 3400 Technical Reference Manual

Other Power Management Issues

Issues described up to this point in this chapter deal with configurable options in the BIOS that affect
system performance and power consumption. Other power management features are built into the
system to prevent heat damage and data loss.

Battery Charge Level and Power Management

The pen tablet monitors the voltage of the battery pack. When the voltage drops to low levels, the system
is forced into Idle or Suspend mode to increase battery life and prevent data loss. Table 7-4 describes
system operation for different battery charge levels.
Mode
Normal mode:
Battery charge 12% to 100% or
system connected to external power.
Low battery mode:
Battery charge below 12%
Critically low battery mode:
Battery charge below critical
threshold.

Table 7-4. Low Battery Modes

Power management features operate normally.
The low battery alarm (periodic audible "beep") is sounded.
The system is forced to suspend using Suspend-to-RAM mode.
The system will not resume until a sufficiently charged battery
pack is installed or external power is connected.
The power LED flashes indicating that the system is in Suspend
mode.
Note:
• In the event of a critically low battery, the system is forced into
Suspend-to-RAM mode regardless of the Suspend Mode
setting in BIOS Setup.
• The percent of full battery charge cannot be determined for the
critically low battery level because the circuit that detects the
critically low voltage level monitors the battery voltage
independent of the PMU.
Other Power Management Issues
Description
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