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Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T

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| Battery Pack Operations


Battery Pack Operations

This appendix covers the following information concerning battery pack operating time:

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:

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 guidelines:

Maximizing the Energy Stored

To maximize the energy stored in the battery pack, follow these guidelines

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Conditioning a Battery Pack

CAUTION.GIF (182 bytes)

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. Plug in the AC adapter and allow the battery to charge until the battery charging status icon turns off. Your battery gauge may show four bars (and Windows may report 100%) before the battery charging status icon turns off.   Do not unplug the AC adapter until the battery charging status icon disappears.

2. Unplug the AC adapter and allow the battery to drain until the computer reaches hibernation and turns itself off. Do not plug in the AC adapter during this process or you will need to restart with Step 1. You may use the computer while the battery is draining.

3. Plug in the AC adapter and begin using the computer.

 

The table below shows the approximate battery pack charge times.

Approximate Battery Charge Time

Computer

On Line

Off Line

Li ion Battery Pack

4.5 hours

2:50 hrs

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Disposing 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.GIF (182 bytes)

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 exposes potentially harmful battery components.

 

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