Compaq 1245 specifications Increasing Battery Pack Operating Time, Conditioning a Battery Pack

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Maintenance & Service Guide

Presario 1200 Series

Model: 1245

Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal & Replacement Procedures Specifications Pin Assignments Battery Pack Operations

Battery Pack Operating Time

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

●Increasing battery pack operating time

●Conditioning a battery pack

●Disposing 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:

1.Set the power conservation levels in the Power Management utility to Maximum.

2.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.

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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.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.

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 No. 1. You may use the computer while the battery is draining.

3.Your battery is re-conditioned.

4.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

NiMH Battery Pack

4.0 hours

2:00 hrs

Disposing of a Used Battery Pack

In the interest of safeguarding our environment, Compaq Computer Corporation recommends that nickel metal hydride (NiMH) 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 exposes potentially harmful battery components.

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Contents Maintenance & Service Guide Maintenance & Service Guide Preface SymbolsProduct Description CompaqBattery ES NiMH System Memory 32 MB Models & FeaturesDisplay 12 HPA Processor Hard Drive CD Drive 24× MAX ModemControls and Lights Front Panel ComponentsLeft Side Components Right Side Components Bottom of Unit Rear Connectors Power Management for Windows Power Management Properties Power Management SettingsDisplay Properties Sleep Mode To Initiate To End Indicators Hibernation ModeRebooting After a Lockup Servicing Your Computer Full Off Mode Illustrated Parts Catalog System Unit Place cursor over each device to obtain its part numberPlace cursor over each device to obtain its part number BoardsDisplay Assembly Place cursor over each device to obtain its part number Mass Storage DevicesMiscellaneous Cables Kit Cables Power CordMiscellaneous Hardware and Plastics Kit Miscellaneous Hardware and Plastics KitMiscellaneous Parts Description Documentation and SoftwareSpare Part Number Serial Number Location Removal and Replacement ProceduresGenerating Static Electrostatic DischargeService Considerations Select the desired illustration Cables and ConnectorsPlastic Parts ZIF Connectors Ribbon cable position for the 3.2-GB hard drive Ribbon cable position for the CD drive Ribbon cable position for the diskette drive Back to Cables and Connectors Preparing the Computer for Disassembly To remove the battery pack, complete the following steps Removing the Battery PackReplacement Procedures Removing the Palmrest Cover with Touch Pad Prepare the computer for disassemblyWhen replacing the palmrest cover, ensure Return to Removal Removing the Heatspreader Removing the Keyboard Removing the Processor To replace the processor complete the following steps Maintenance & Service Guide Removing the Hard Drive Presario 1200 Series Models Replacement Procedures Removing the CD Drive Maintenance & Service Guide To replace the CD drive, reverse the previous procedures Removing the Battery Charger Board Removing the Modem To replace the modem, reverse the previous procedures Removing the Display Panel Assembly Maintenance & Service Guide Maintenance & Service Guide Maintenance & Service Guide When removing the display panel assembly Return to Removal Removing the Upper CPU Cover Removing the Speaker Assembly Removing the Diskette Drive Fan Assembly System Board Dip Switch Settings Memory ModuleReplacement Procedures System Board Dip Switch Settings Memory Module Removing the Fan AssemblyTo replace the fan assembly, reverse the previous procedure Removing the System Board Remove three standoffs from the system board Maintenance & Service Guide Remove three screws from the system board To replace the system board, reverse the previous procedures Memory Module Removing the Memory ModuleReplacement Procedures Physical and Environmental SpecificationsSystem Interrupts System InterruptsHardware System Function System DMA System DMAHardware DMA System Function System I/O Address Address Hex System Function Shipping ConfigurationSystem I/O Address System Memory Catalog System Memory CatalogDisplay Memory Expansion Energy Battery PackEnvironmental Requirements Diskette Drive Hard Drives Logical ConfigurationHard Drives Capacity Per Drive Formatted Seek TimesCD Drive 24× CD Drive DimensionsRotational Speed Typical Transfer RateConnector Pin Assignments Increasing Battery Pack Operating Time Battery Pack Operating TimeConditioning a Battery Pack Disposing of a Used Battery PackFollow the Preliminary Steps TroubleshootingRun Computer Checkup Preliminary StepsRunning Post Power-On Self Test PostProbable Cause Recommended ActionPerform Computer Checkup Test Compaq DiagnosticsView System Information Inspect Shipping Preparation Contacting Compaq SupportRemove the Palmrest Cover with Touch Pad Clearing the Power-on PasswordSelect error codes by number or type Diagnostic Error CodesBefore Replacing Parts Troubleshooting Without DiagnosticsSolving Minor Problems Solving Power Problems Solving PC Card Problems
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