Acer 710 Series User Manual

3.77 Mb

2 Operating on Battery Power

The computer operates on AC or battery power. This chapter contains the information you need to know to operate the computer on battery power. It also includes information on how your computer manages and saves power.


Battery Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Battery Pack Characteristics . . . . . . . . . . . . . . 32

Installing and Removing the Battery Pack . . . . 33

Charging the Battery . . . . . . . . . . . . . . . . . . . . 34

Charging Modes. . . . . . . . . . . . . . . . . . . . 34

Checking the Battery Level . . . . . . . . . . . . . . . 35

Using the Windows Battery Meter . . . . . . 35

Optimizing Battery Life . . . . . . . . . . . . . . . . . . 36

Battery-low Warning . . . . . . . . . . . . . . . . . . . . 37

Heuristic Power Management . . . . . . . . . . . . . . . . . 39

Power Management Modes . . . . . . . . . . . . . . . 40

Display Standby Mode . . . . . . . . . . . . . . . 40

Hard Disk Standby Mode . . . . . . . . . . . . . 40

Peripheral Standby Modes . . . . . . . . . . . . 40

Standby Mode . . . . . . . . . . . . . . . . . . . . . 40

Hibernation Mode . . . . . . . . . . . . . . . . . . 42

Advanced Power Management . . . . . . . . . . . . . 44


Battery Pack

Battery Pack

The computer uses a battery pack that gives you long use between charges.

Battery Pack Characteristics

The battery pack has the following characteristics:

Employs Current Battery Technology Standards

The computer uses a Lithium-Ionbattery pack which does not have the memory effect problem of Nickel Cadmium (NiCd) batteries.Li-Ionbatteries consistently provide the longest battery life,best-suitedfor road warriors.


When the battery charge level becomes low, the computer gives off warning beeps and the status indicator flashes at regular intervals. This tells the user that the battery power is critically low. You can correct this situation by recharging the battery pack.

Whenever possible, use the AC adapter. The battery will come in handy when you travel or during a power failure. It is advisable to have an extra fully-chargedbattery pack available as backup.

Using a Battery Pack for the First Time

When using a battery pack for the first time, follow these steps:

1.Disable the Battery Low Suspend parameter in Setup or uncheck the Enable sleep upon battery low in the Power Management screen of Notebook Manager. See page 93 andpage 80 respectively.

2.Connect the AC adapter to a power source and to the computer and fully recharge the battery


User’s Guide

Battery Pack

3.Disconnect the adapter to use up the battery before recharging again.

You only need to do this once with a new battery or with a battery that's been stored without being used for a long time. If the computer is to be stored for more than two weeks, we suggest you remove the battery pack. Battery power from a fully chaged battery pack depletes in roughly a day with the computer in Standby mode, a month in Hibernation mode or when power is off.

Warning! Do not expose battery packs to temperatures below 0ºC (32ºF) or above 60ºC (140ºF). This may adversely affect the battery pack.

Installing and Removing the Battery Pack

Important! Before removing the battery pack, make sure that you have an AC adapter connected to the computer; otherwise turn off the computer.

Follow these steps to install the battery pack:

1.Press the battery bay cover release button and slide out the cover as shown in the figures below.

Chapter 2 Operating on Battery Power


Battery Pack

2. Insert the battery pack into the battery bay.

3. Replace the battery bay cover.

To remove the battery pack, remove the battery bay cover; then pull out the battery pack using the pull loop.

Charging the Battery

To charge the battery, place the battery pack inside the battery bay and plug the AC adapter into the computer and an electrical outlet.

Charging Modes

The adapter has three charging modes:

Rapid mode

The computer uses rapid charging when power is turned off and a powered AC adapter is connected to it. In rapid mode, a fully depleted battery gets fully charged in approximately two hours.


User’s Guide

Battery Pack


When the computer is in use with the AC adapter plugged in, the computer also charges the battery pack if installed. This mode will take longer to fully charge a battery than rapid mode. In charge-in-usemode, a fully depleted battery gets fully charged in approximately three to four hours.

Trickle mode

When the battery is fully charged, the adapter changes to trickle mode to maintain the battery charge level. This prevents the battery from draining while the computer is in use.

Note: We suggest that you charge the battery pack before retiring for the day, letting it charge overnight before traveling. This ensures a fully charged battery for use the next day.

Checking the Battery Level

The computer features battery-lowwarning signals that are both audible and visible. When the battery pack is low, the computer emits warning beeps and the battery indicator flashes at regular intervals. Also, you can check the battery charge level using the Windows battery gauge.

Using the Windows Battery Meter

The Windows battery meter indicates the present battery level. Simply rest your cursor on the battery gauge (or AC plug) icon on the taskbar to see the present charge level of your battery.

Chapter 2 Operating on Battery Power


Battery Pack

Optimizing Battery Life

This section helps you get the most out of battery operation. Optimizing battery life prolongs the charge/recharge cycle and improves recharge efficiency. Follow these suggestions to optimize and maximize battery power:

Purchase an extra battery pack.

Use the PhDISK utility to reserve hard disk space for the Hibernation function. See “PhDISK” on page 73.

Use the AC adapter whenever possible so that the battery is reserved for on-the-gocomputing.

Keep the battery pack in the computer powered by the AC adapter. The constant trickle charge maintains the battery level to eliminate the battery self-dischargeeffect. Thecharge-in-usefunction also charges the battery pack.

Disable the parallel and serial ports if no devices are connected to these ports. You can do this through the Setup Utility. See “Advanced” on page 89.

Eject the PC card from the card slot when not in use, since the PC card draws extra power.

Store the battery pack in a cool, dry place. The recommended storage temperature for battery packs ranges from 10 to 30 degrees C. The higher the storage temperature, the faster the battery pack self-discharges.

The batteries can be recharged about 300 times when used as directed. Excessive recharging decreases battery life.

Take care of your battery pack and AC adapter. See “Care and Maintenance” on page xix of the preface.


User’s Guide

Battery Pack


You never have to worry about battery power as long as you are using the AC adapter. However, when you operate the computer on battery power, pay extra attention to the warning beeps and the power indicator on the display panel.

The following signals indicate a battery-lowcondition:

The buzzer generates four short beeps every minute, if you enabled the Battery-lowWarning Beep parameter in Setup.

The power indicator flashes at regular intervals until battery power is depleted.

When you receive a battery-lowwarning, you have around two minutes to save your work. If you do not connect the AC adapter within this period, the computer enters Hibernation mode if the Battery Low Suspend parameter in Setup is enabled and the following conditions exist:

The Hibernation file created by PhDISK is present and valid. See “PhDISK” on page 73.

There is enough battery power left to save system information onto the hard disk.

Otherwise, the computer enters Standby mode.

Warning: Connect the AC adapter to the computer as soon as possible. Data is lost when computer power is cut off during Standby mode.

Chapter 2 Operating on Battery Power


Battery Pack

The following table shows the recommended course of action to take when you encounter a battery-lowcondition.


Recommended Action



AC adapter and power outlet available

1.Connect the AC adapter to the computer.

2.Save all necessary files.

3.Resume work.

Power off the computer if you wish to recharge the battery rapidly.

An extra fullycharged battery pack available

1.Save all necessary files.

2.Exit the application.

3.Power off the computer.

4.Replace the battery pack.

5.Power on the computer and resume work.


1.Save all necessary files.

2.Enter Hibernation mode.

3.Install the extra battery pack.

4.Resume from Hibernation mode.

AC adapter or power outlet not available

1.Save all necessary files.

2.Exit the application.

3.Power off the computer.


1.Save all necessary files.

2.Enter Hibernation mode.


User’s Guide

Heuristic Power Management

Heuristic Power Management

This computer has a built-inheuristic power management unit that monitors system activity. System activity refers to any activity involving one or more of the following devices: keyboard, mouse, floppy drive, hard disk, peripherals connected to the serial and parallel ports, and video memory. If no activity is detected for a period of time (called an inactivitytime-out),the computer stops some or all of these devices in order to conserve energy.

This computer employs an innovative power management technique called Heuristic Power Management or HPM. HPM allows the computer to provide maximum power conservation and maximum performance at the same time.

Power management methods used by most computers are timer-based.You set inactivitytime-outvalues for the display, hard disk, and other devices. The computer then "sleeps" when thesetime-outselapse. The problem with this is that no two users are alike. Each of us has his or her own habits when using the computer, which makes timerbased power management ineffective.

With HPM, your computer manages its power according to the way you use your computer. This means the computer delivers maximum power when you need it, and saves power when you don’t need the maximum — all without your intervention. There are no timers to set, because the HPM system figures out everything for you.

Note: We recommend you enable heuristic power management to prolong your battery life.

Chapter 2 Operating on Battery Power


Heuristic Power Management

Power Management Modes

Display Standby Mode

Screen activity is determined by the keyboard, the built-intouchpad, and an external PS/2 pointing device. If these devices are idle for the period determined by the computer’s HPM unit, the display shuts off until you press a key or move the touchpad or external mouse.

"Automatic Dim" Feature

The computer has a unique "automatic dim" power-savingfeature. When the computer is using AC power and you disconnect the AC adapter from the computer, it automatically dims the LCD backlight to save power. If you reconnect AC power to the computer, it automatically adjusts the LCD backlight to a brighter level.

Hard Disk Standby Mode

The hard disk enters standby mode when there are no disk read/write operations within the period of time determined by the HPM unit. In this state, the power supplied to the hard disk is reduced to a minimum. The hard disk returns to normal once the computer accesses it.

Peripheral Standby Modes

The peripheral connections in your computer also power down to save power if there is no activity within the period of time specified by the computer’s HPM unit for these devices. These include audio, serial ports, floppy drive and parallel port.

Standby Mode

The computer consumes very low power in Standby mode. Data remain intact in the system memory until the battery is drained.


User’s Guide