Compaq Presario 1272 Notebook
(250-0330)               Battery Specifications      Faxback Doc. # 56794

SPECIFICATIONS
Battery Pack: ............................... Nickel Metal Hydride (NiMH)

Dimensions
Height: ................................................ 0.8 in (20.3 mm)
Length: ................................................. 5.7 in (145 mm)
Width: ................................................. 3.1 in (78.7 mm)
Weight: ............................................... 1.01 lb (458.1 g)

Energy
Nominal Open Circuit Voltage: ..................................... 9.6 V
Capacity: ........................................................ 4.5 Ah
Power: .......................................................... 43.2 Wh

Environmental Requirements
Operating Temperature: .................................. 32ø F (0-50ø C)
Non-operating Temperature: ................................ -20ø C -60ø C
Charging Temperature: ........................................ 5ø C-45ø C

TECHNOLOGY DESCRIPTION:

The Presario 1272 Notebook computer includes a High Capacity Nickel Metal
Hydride (NiMH).

SMART TECHNOLOGY:

The Smart battery technology allows for a more accurate battery life. The
Smart battery pack also has a charge indicators in 25% increments that
informs the user how much battery charge is left in the battery. The Smart
battery that comes with the Presario 1200 Series portable computer has the
charge indicator on the battery itself that will show how much battery
charge is left, in increments of 25% (not for 1900 Series batteries).

High Capacity NiMH
Standard NiMH batteries have capacities of 36.5 watt hours versus the High
Capacity NiMH battery's 43 watt hours.  Watt hours are calculated as
follows:

Watt Hour = 1 watt of power for one hour

The High Capacity Batteries provides better battery life at lower cost
versus standard batteries.  They also have better ability for controlled
charging, discharging, and status life. *

High Capacity NiMH batteries DO NOT have a "memory effect".

It is recommended that NiMH batteries be fully discharged and then fully
recharged periodically for better battery life.

*Actual battery performance will vary depending on the computers Power
Management settings, system components, options, applications used, AND
OPERATING ENVIRONMENT.

POSITIONING:
The Presario 1200 Series notebooks come with the latest battery technology
which provide each user with great performance.

KEY MESSAGES/SUPPORTING FEATURES:
Enhanced Smart NiMH:
Provides more battery life over standard NiMH batteries

BENEFITS:
Smart technology provides instantaneous battery charge information.
Enhanced batteries provide greater than 18% higher capacity than previous
generation batteries.

BATTERY PACK OPERATIONS
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. 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       NiMH Battery Pack
 On Line       4.0 hours premature termination
 Off Line      2:00 hrs

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.

(RDS 09/20/1999)

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