Compaq Presario Series Maintenance and Service Guide
United States December 9, 2002
Presario 305 Model
Before You Begin
Specifications
Parts Catalog
Removal Sequence
Troubleshooting
Battery Operations
Product Description
Pin Assignments
Index
Battery Pack Operating Time
This appendix covers the following information concerning battery pack operating
time:
●
Increase battery pack operating time
●
Conditioning a battery pack
●
Disposal of a used battery pack
Increasing Battery Pack Operating Time
Battery pack operating time differs depending on several variables. To avoid
unnecessary replacement, consider the following variables when determining
how long a charged battery pack should last:
●
Power management settings
●
Hardware configuration
●
Software applications
●
Installed options
●
Display brightness
●
Hard drive usage
●
Changes in operating temperature
●
Type and number of installed PC Cards
NOTE:
The power consumption requirements for PC Cards
vary widely. Some cards drain the battery pack
very rapidly.
Battery pack operating time can be increased by as much as 50 percent by
controlling the energy required by the computer and the energy stored in the
battery pack.
Minimizing the Energy Required
To minimize the energy required by the computer, follow these steps:
●
Set the power conservation levels in the Power Management
utility to
Maximum
.
●
Customize the timeout value to work more efficiently with the
applications. The amount of battery life depends on the values
selected.
Maximizing the Energy Stored
To maximize the energy stored in the battery pack, follow these guidelines:
●
Condition the battery pack at least every 30 days to improve
overall battery performance.
●
Keep a battery pack in the computer when using it with AC
power to supply the battery pack with a constant trickle charge.
●
Store the battery pack in a cool, dry place when not in use.
Conditioning a Battery Pack
CAUTION:
To avoid a loss of data, ensure
that all data is saved before discharging a
battery pack.
To condition a battery pack, complete the following steps:
1. Allow the battery to drain until the computer reaches hibernation
and turns itself off.
Do not plug in the AC adapter during this
process.
Also, the system should not be allowed to sleep. To prevent
sleep, you may either use the computer while the battery is draining,
or you may disable power management.
2. Plug in the AC adapter and allow the battery to charge until the LED
light on the display stops blinking. Your battery gauge may read 100
percent for a period of time before LED light on the display stops
blinking. Do not unplug the AC adapter until the arrow disappears.
Your battery is now re-conditioned, and you may begin using the
computer normally.
The battery pack charge time may vary greatly from 2 hours to 5 hours or more,
depending on many factors (including whether it is charged on-line or off-line).
Disposal of a Used Battery Pack
In the interest of safeguarding our environment. Compaq Computer Corporation
recommends that nickel metal hydride (NiMH) and lithium ion (Li ion) battery
packs be recycled. Battery packs should be handled in accordance with country,
state, province, or local regulations.
CAUTION:
Never attempt to open or service a battery
pack. Opening a battery pack not only damages the pack
and makes it unusable, but also expose potentially harmful
battery components.
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