Compaq Presario 305 Specifications download pdf (Page 69)

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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