Acer AcerNote 950 Manuel utilisateur

Operating on Battery Power 2-1

Chapter 2

Operating on Battery Power

This chapter contains the information you need to know to operate the

notebook on battery power.

2.1 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-charged battery pack available for backup. The battery pack is installed

in the power bay. Before removing the battery pack, make sure that you turn

off the notebook and close the LCD display properly. Place the unit in an

upside-down position and unlock the power bay lock to release the battery

pack as shown in Figure 2-1.

Figure 2-1 Removing the Battery Pack

1If a CD-ROM drive / battery pack unit is installed in the notebook, you need to remove the whole unit

from the accessory and power bays. Then, detach the battery pack from the CD-ROM drive module.

Battery pack

Power bay lock

2-2 User’s Manual

Do not expose battery packs to temperatures below 0ºC (32ºF)

or above 60ºC (140ºF). This may adversely affect the battery

pack.

Currently, there is no defined standard for measuring battery life. Several

factors have made it almost impossible to compare the battery life of

different notebooks based on specifications alone. These factors include

different implementations of power saving/management systems,

applications in use, the user’s “usage pattern”, hard disk capacity and access

frequency, LCD size and brightness, system form factor and weight.

If the system is to be stored for more than two weeks, we

suggest that you remove the battery pack. Battery power (from

a fully charged battery pack) depletes in roughly ten days with

the notebook in standby mode. When the power switch is off,

battery power depletes in one month.

2.1.1 Battery Pack Characteristics

The battery pack has the following characteristics:

•

Battery pack self-discharge

Battery packs self-discharge slowly, which

may result in a low battery power condition after being stored for weeks.

•

Memory effect

This is a phenomenon wherein charging finishes in one-

third the normal charge time. This leaves the battery pack not fully

charged due to inactive status after over-charging or long-term aging.

This situation can usually be improved by conditioning the battery pack

three times or more. Please refer to section 2.4.2 for details on how to

condition the battery pack.

•

Battery-low indicator (icon)

When the battery level becomes low, the

battery-low icon ( ) on the status LCD appears. This informs the user

that the battery power is critically low. You can correct this situation by

recharging the battery pack.

Operating on Battery Power 2-3

2.1.2 Installing a Secondary Battery Pack

The notebook’s modular design allows you to use two battery packs at the

same time. The primary battery pack is inserted into the power bay and a

secondary battery can be inserted into the accessory bay when you need it.

When the Accessory Bay Houses a Diskette Drive

Follow these steps to install a secondary battery pack.

1. Make sure the system power is

off. Remove the internal diskette

drive by unlocking the accessory

bay lock and pulling the drive out.

Set aside the diskette drive.

2. Extend the battery cover plate of

the secondary battery pack.

3. Insert the secondary battery pack

into the accessory bay and click it

into place.

2-4 User’s Manual

When the Accessory Bay Houses a CD-ROM Drive

When the 6-cell Li-Ion battery pack is installed in the power bay,

do not install a secondary battery pack.

Follow these steps to install a secondary battery pack.

1. Make sure the system power is

off. Remove the CD-ROM drive /

battery pack unit by unlocking the

accessory bay lock and CD-ROM

drive lock. Then pull the drive

out. Set aside.

2. Insert the primary NiMH battery

into the power bay.

3. Extend the battery cover plate of

the secondary NiMH battery pack.

4. Insert the secondary NiMH battery

pack into the accessory bay and

click it into place.

Operating on Battery Power 2-5

2.2 Charging the Battery

Place the battery pack inside the battery compartment and plug the AC

adapter into the notebook and an electrical outlet.

The adapter has three charging modes:

•Rapid mode

The system uses rapid charging when the notebook (with a battery pack

installed) is turned off and a powered AC adapter is connected to it. In

rapid mode, a fully depleted NiMH battery gets fully charged in

approximately two hours. The battery LEDs light up as it is being

charged to indicate the level of charge.

•Charge-in-use mode

When the notebook is in use with the AC adapter plugged in, the

notebook also charges the battery pack if installed. This mode will take

longer to fully charge a battery than rapid mode.

•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 system is in use.

2-6 User’s Manual

2.3 Checking the Battery Level

The system features battery-low warning signals that are both audible and

visible. When the battery pack is low, the system emits warning beeps at

regular intervals. You can turn off this feature by disabling the Battery-low

Warning Beep parameter in the Setup utility (refer to section 4.6.5). In this

situation, a battery-low icon ( ) appears on the status LCD.

There are two ways to check the battery charge level:

•Onscreen battery gauge utility

•Battery-level LEDs on the battery pack

Using the Battery Gauge

To access the onscreen battery gauge, press -R. The following screen

displays:

Phoenix NoteBIOS v4.0 Battery Gauge Manager

(%) Empty 10 20 30 40 50 60 70 80 90 Full

R-Pack

L-Pack Battery Disconnected

The onscreen battery gauge indicates the present battery level.

R-pack refers to the primary battery installed in the power bay, while L-pack

refers to the secondary battery housed in the accessory bay.

Operating on Battery Power 2-7

Using the Battery LEDs

To check the battery using the battery LEDs:

Press the battery level button near

the battery LEDs to check the

charge level of the battery pack.

The LEDs light up to indicate the

battery level. Each LED signifies 20

percent. For example, if three LEDs

light up, it means the battery has 40

to 60 percent of its maximum power.

Refer to Table 2-1.

Table 2-1 is a battery-level chart.

Table 2-1 Battery-level Chart

Battery LEDs LEDs Lit Charge Level

five 80%~99%

four 60%~80%

three 40%~60%

two 20%~40%

one 0%~20%

When the battery is fully charged (100 percent), the battery

LEDs turn off automatically. If you press the battery level

button, five LEDs light up.

2-8 User’s Manual

2.4 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.

2.4.1 Maximizing Battery Power

Follow these suggestions to maximize battery power:

•Purchase an extra battery pack.

•Use the system utility PHDISK to reserve hard disk space for the zero-

volt suspend function once the system is installed with DOS.

•Use the AC adapter whenever possible so that the battery is reserved

for on-the-go computing.

•Condition the battery pack to reduce the possibility of memory effect.

Refer to section 2.4.2.

•Keep the battery pack in the notebook powered by an external power

source (AC adapter or docking station).

•When powered by the AC adapter, the constant trickle charge

maintains the battery level to eliminate the battery self-discharge

effect. The charge-in-use function also charges the battery pack.

•When powered by a docking station, the battery pack can be

recharged fully in approximately two hours. Check the battery level

to verify.

•Disable the parallel and serial ports if no devices are connected to these

ports. You can do this through Setup.

•Make use of the power-saving modes described in sections 2.5 and 2.6.

Operating on Battery Power 2-9

•Eject the PCMCIA card from the card slot when not in use, since the

PCMCIA card draws extra power.

When using a network card, logout first before ejecting the card.

•Use the disk cache utility SMARTDRV (bundled with MS-DOS) or

create a virtual disk (RAMDRIVE) to lessen the loading of the hard disk

drive.

•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 500 times when used as directed.

Excess recharging decreases battery life.

2.4.2 Conditioning the Battery Pack

Conditioning the battery pack reduces the possibility of memory effect,

common to most rechargeable battery systems. We recommend that you

condition the battery pack at least once every month, preferably twice a

month. A battery discharge utility helps you discharge the battery pack

quickly.

Follow these steps to condition the battery pack:

1. Connect the AC adapter.

2. Turn on the notebook (with the battery pack installed).

2-10 User’s Manual

3. Enter Setup by pressing the no-reboot Setup button ( ). The

discharge function is not available if you enter Setup using Pduring

boot-up.

Power Management Mode [Enabled]

Hard Disk Standby Timer [1 Minute]

Display Device [Auto]

LCD Expanded Mode [Enabled]

Battery-Low Warning Beep [Enabled]

Standby/Suspend Upon Battery-Low [Enabled]

Password Check During Resume [Disabled]

Display Standby Timer [1 Minute]

System Standby/Suspend Timer [3 Minutes]

ESC Exit Change Values F7 Battery DischargeSelect Item

↑↓ → ←

Select Power Management

Mode. Choosing modes

changes system power

management settings. To

alter these settings,

choose Enabled. To turn

off power management,

choose Disabled.

LCD Panel Control

4. Press Uto activate the battery discharge function. This disables all

power-management functions and uses up the battery power even if the

AC adapter is connected. The following screen displays.

System is now installed with

Battery

Discharge battery now.

Cancel battery discharge.

Enter

Esc

Press H

to discharge the battery or _to cancel the operation.

The battery pack begins discharging. The battery discharge function also

deactivates the power-saving features.

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