DEAR ALL,
FEW IMPORTANT TIPS TO IMPROVE THE PERFORMANCE OF THE BATTERY……
Notebook PCs operate on two kinds of power: A/C power (the kind of power
that you get from plugging a power adapter into a wall outlet) and D/C power
(the kind of power that you get from a battery). Get the most out of your
notebook's battery life cycle by following these suggestions.
Users often ask how long should their battery last between charges, or why
does one model of computer get better battery performance than another.
There is no simple answer. Battery life will vary depending on the product
configuration, product model, operating system, applications loaded on the
product, power management setting of the product, and the product features
used by the customer. For all batteries used in an electronic device, the
maximum capacity of the battery will decrease with time and usage.
Power plans
A power plan is a collection of hardware and system settings that manages
how your computer uses power. Power plans can help you save energy, maximize
system performance, or achieve a balance between the two. Learn more about
power plans by clicking HP
<http://h10025.www1.hp.com/
8> Notebook PCs - Power Management for Vista or HP
<http://h10025.www1.hp.com/
3> Notebook PCs - Power Management for Windows 7 .
Maximizing the capacity and life span of the battery
It is important to be aware of ways that you can care for the battery in
your notebook PC. There are conditions that may reduce battery run time and
life span.
Factors that contribute to loss of battery capacity
* Li-Ion battery cells suffer gradual, irreversible capacity loss with
each discharge-charge cycle. Such aging occurs more rapidly as temperature
and discharge loads increase.
* The self-discharge rate of a Li-Ion battery is higher if the battery
is left in an unpowered notebook.
* During prolonged storage or non-use, the battery charge will
decrease below its recommended low-voltage level.
* Leaving the battery in a depleted condition for an extended period
accelerates the decrease in full charge capacity. Leaving the battery at a
high level of charge in a high-temperature environment for extended periods
(for example, running a notebook computer in a docking station under a heavy
load) also accelerates the loss of capacity.
* Running high-end applications using the battery accelerates the loss
of capacity. For example, playing 3D games lowers full charge capacity
faster than using word processing applications.
Recommended battery care practices
Recommendations for battery usage and storage are covered in the HP User
Guides for each model.
Additional battery care practices are as follows:
* Store Li-Ion batteries between 20°C and 25°C (68°F and 77°F) with
30% to 50% charge.
* Do not disassemble, crush, or puncture a battery; do not short the
external contacts on a battery; and, do not dispose of a battery in fire or
water.
* Do not leave batteries exposed to high temperatures for extended
periods. Prolonged exposure to heat (for example, inside a hot car)
accelerates the deterioration of Li-Ion cells.
* Remove the battery if the notebook will be stored (turned off and
not plugged into AC power) for more than 2 weeks.
* Remove the battery from the notebook if the notebook will be plugged
into AC power continuously (via a wall adapter or docking station) for more
than 2 weeks.
* Use the type of battery with the highest capacity (Ah) rating if the
notebook will run high-end applications on battery power.
* Calibrate the battery based on the usage model. Under normal usage,
batteries should be calibrated a minimum of once every 2 - 3 months;
however, a battery that is rarely discharged fully should be calibrated
about once a month.
* Keep the battery away from children.
* Use only the battery provided with the computer, a replacement
battery provided by HP, or a compatible battery purchased as an accessory.
* Run the Battery Check in the HP Support Assistant once a month to
maintain the battery.
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Tips for conserving battery power
You can manually change the power consumption of your notebook PC and
conserve battery power.
* Reduce the number of open applications . Every application uses
memory, and therefore power, even when the application widow is minimized.
Exit any application the is not being used.
* Reduce the brightness of the screen to the minimum readable level.
Use the Fn and F7 or F8 keys to adjust the brightness.
* Remove peripherals when not in use. External hard drives, CD-ROMs,
Zip drives, PC cards, and other peripheral devices can draw power from your
battery even when they are not in active use. Disconnect them when you are
finished using them.
* Reduce the speed of your processor. The faster your computer works,
the more quickly it uses up the supply of power. You can extend the charge
of your battery by slowing down your processor's speed. Methods to reduce
processor speed vary from model to model, and your manual should provide
instructions for doing so.
* Turn off the Wireless On-Off button when it is not in use. If your
notebook has one, press the Wireless On-Off button so that the light turns
off.
* Change the power option setting from High performance to either HP
Recommended or Power saver to conserve battery power.
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