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Battery Basics |
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Nickel-cadmium
(Ni-CD)
– Ni-CD batteries are
used in devices where longer
life, higher
power and duration in more extreme temperatures are
needed. These
battery types
are commonly seen in power tools and two-way radios. |
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Nickel-metal-hydride
(Ni-MH) –
Ni-MH batteries provide
more energy
than
Ni-CD
batteries but for a shorter period of time. These
battery types
are commonly seen in mobile phones, PDAs, and older notebook
PCs. |
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Lithium-ion
(Li-ion)
–
Li-Ion
batteries are the
most advanced batteries
currently
used in
portable
electronic
devices
such as notebook PCs, cellular telephones, and portable DVD
players.
Li-Ion batteries are lighter, store more energy and retain
their charge longer than nickel-based batteries of
comparable size. Also, Li-Ion batteries can be recharged
before they are fully discharged without losing charge
capacity to the memory effect. |
Battery Safety |
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HP takes safety very seriously and makes
battery Material Safety Data Sheets
(MSDS) available that provide general safety
information about the third party (non-HP)
batteries used in HP products and throughout
the industry. In addition, HP works closely
with third party battery suppliers to drive
continuous safety and design improvements
that help deliver higher levels of safety
and reliability. In the unlikely event of a
potential safety issue, HP uses proven
best-in-class processes and works closely
with the appropriate worldwide regulatory
agencies to help deliver the highest
possible level of safety and best customer
experience.
General Battery Warnings:
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Do not disassemble, crush, or puncture a
battery; short the external contacts on
a battery; or dispose of a battery in
fire or water. Do not expose a battery
to temperatures above 60°C (140°F).
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Keep the battery away from children.
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Only the battery provided with the
computer, a replacement battery provided
by HP, or a compatible battery purchased
as an accessory from HP should be used
with the computer.
This information and more is available in
the documents listed below. These documents
are provided with your notebook PC in
printed form, on a CD that was included with
your notebook PC, or on the hard drive of
your notebook PC. These documents can also
be located online by visiting
www.hp.com,
selecting the “Support and Troubleshooting”
link and entering your notebook PC model
information.
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Getting Started Guide
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User Guide
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Regulatory and Safety Notices Guide
To learn more about HP notebook
reliability, refer to the HP Notebook PC
Professional Innovations
website. |
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Battery cycle life and aging |
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The life
of your battery will vary depending on the product
configuration, product model, applications loaded on the
product, power management settings of the product, and the
product features used by the customer. As with all
batteries, the maximum capacity of your battery will
decrease with time or use. |
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All
rechargeable batteries gradually lose their capacity to hold
a charge. The battery cycle
life is the total number of charge cycles a
battery supplies before it can no longer hold a useful amount
of charge. |
This loss in capacity (aging) is
irreversible
and
cannot be
restored.
Gradually, less and less active material is
available within each cell to
electrochemically store a charge.
Consequently, the battery provides less
useable time
to power
the computer. |
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Lithium-ion (Li-ion) batteries typically
have a
lifespan of between 300 and 500 cycles. With
moderate use, Lithium-ion batteries
can be
expected to deliver around 80% of their
original capacity after 300 cycles or about
one year of use (see graph above). |
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Note:
The graph above illustrates 80% of original
capacity after 300 cycles
at an operating temperature
between 77°
F
and 104°
F (25°
C
and 40°
C).
Higher operating temperatures
can
result in a 70% or more loss
of
capacity
given
the same
number
of cycles. |
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Battery options |
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