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Figure of 8 or Clover Leaf Cable
There are two main type of cables
used to connect your adaptor to your laptop. Figure of eight and
clover leaf cables are used with most adaptors, if you are buy a
as adaptor without a mains cable ensure you have the correct
cable to connect it to your adaptors.

Figure Of 8 Mains
Cable Clover Leaf Mains Cable
Battery
Information
When purchasing a battery there are
several thing you should consider, and rules to follow. These
rules will prolong the life of your battery.
Battery Types
As you probably know batteries come
in all shapes and sizes, and have different chemicals inside
them. NiCad (Nickel Cadmium) these are the oldest type of
battery and are on the verge of being phased out by most battery
manufacturers. Nicad batteries are very toxic to the environment
and hard to dispose of due to the heavy metals they contain
within them. These batteries are also prone to the memory
effect. This is when your battery fails to hold its charge
and last as long as it should. Its caused when batteries are
constantly over charged.
All batteries will eventually stop
working and it will be time to purchase a new one. On average
they last around two years and will loose there storage capacity
from
the time of manufacture. For a
complete description of the memory effect
click here
NiMH (Nickel Metal Hydride)
batteries have a different type of chemistry which makes them
lighter and produce more power from smaller batteries.
Li-Ion (Lithium Ion)
batteries are the new age of batteries, and are being produced
by all the major battery manufacturers. These batteries are
lighter which makes them perfect for portable devices. Li-Ion
batteries don't suffer from the memory effect.
Your laptop will be designed to
work with on of the three types of batteries, so its important
you don't change battery type before reading the manufactures
manual.
Laptop batteries are sold in a
discharged stated, a full charge would be needed before use.
Once fully charged your should switch on your computer and run
your battery down until it is fully discharged, i.e then your
computer turn itself off.
Some new batteries will show a
fully charged state, u need to remove the battery and then re
insert it until is shows a discharged state. On occasions your
laptop will not recognize your new battery. This can be solved
by running a calibration program found in your control panel, if
you need more help consult your manual.
You should discharge your battery 3
or 4 time a year, this will prolong the life of it. If your are
nor using your laptop for a long time, remove the battery in a
discharged state and store it in a cool dry place away from
sources of heat and light.
How Long Will My Battery Run For
Battery run time will depend on
various things. The first is the amount of applications you have
running at one time. If you have 15 applications running then
your battery run time will be shorter than expected than if you
had three running.
It will also depend on the amount
of USB device attached to your model. Devices such as external
drives will require more power that a mouse.
How Long Will My Battery Last
Four
Laptop batteries last for 1 to 3
years when used in normal conditions. But the more the battery
is used, you will notice a reduction in its charging life. Your
batteries cycle is usually about 500 to 1000 charges. Battery
cycle is the amount of times it can be charged and discharged.
Hard Drives
Before you purchase a new hard
drive you need to determine which one you need. Their are two
main types called IDE and SATA. They look the same and are about
the same size. You need to read the numbers and letters on the
drive to determine which one you need.
Look for a group of pins amongst
the connectors at the back. IDE drives have 50 pins in the back
of the drive. SATA drives don't have very few pins or
might not have any at all.
Identify the connection on the
board. An IDE drive contains many pins spread over 2 inches, and
the cable used to connect these pins is called a IDE cable and
looks like a ribbon cable.
Keyboards
when purchasing a new laptop
keyboard you need to consider a few things. The 1st is the size
of your keyboard. With modern laptops the keyboard is usually
the length of the the screen and contain 10 key pads. The medium
sized laptops contain fairly standard sized keyboard minus the
10 key. The thin and light keyboards usually have even smaller
keyboards.
Full sized Keyboards- are
similar in spacing when compared to desktop computers, which can
make it easier for you to start typing. They also include a 10
key which makes it easier for you if your work in the
accountancy profession.
Medium Size- These are found
on many laptops usually on the 15.4 and 14.1 sized laptops and
some older 17inch models
Compact Size- You need to pay
attention when you move into the thin & light or ultra portable
class notebook. These contain condensed keyboards which make
many people feel cramped and frustrated. If u have large hands
then I suggest you go for a medium sized keyboard. If your
looking at ultra compact laptops on websites, u should take a
look at them in your local store to ensure they are ergonomic.
Memory
When upgrading your memory you must
first decide what type of memory you need and how much you need.
There are various types of memory and your laptop will be
designed to work with specific types. The newest models will be
using DDR2 memory. DDR is short for Double Data Rate, which is
faster than old versions of memory. DDR3 is also in use on the
latest models of laptops.
In addition to the type of memory
installed in the notebook, the speed of the memory can also make
a difference in the performance. When comparing notebook
computer systems, be sure to check both of these pieces of
information to determine how they may impact performance.
There are two ways that the
memory speeds can be designated. The first is by the memory type
and its clock rating, like DDR2 400. The other method is by
listing the type along with the bandwidth. In the case the same
DDR2 memory would be listed as PC2-3200 memory. Below is a
listing in order of lowest to fastest memory types in both
formats:
- DDR2 400 / PC2-3200
- DDR2 533 / PC2-4200
- DDR2 667 / PC2-5300 or
PC2-5400
- DDR2 800 / PC2-6400
- DDR3 800 / PC3-6400
- DDR3 1066 / PC3-8500
- DDR3 1333 / PC3-10600
Restrictions on your Memory
Notebook computers generally have
two slots available for memory modules compared to four or more
in desktop systems. This means that they are more limited in the
amount of memory that have available. With current memory module
technologies, this restriction generally comes to four gigabytes
of RAM in a notebook system based on 2GB modules. Some ultra
portable systems are even fixed with one size of memory that
cannot be changed at all. So what is important to know when you
look at a notebook?
First, find out what the maximum
amount of memory is. This is generally listed by most of the
manufacturers. This will let you know what upgrade potential the
system has. Next, determine how the memory configuration is when
you buy the system. For example, a notebook that has 1GB of
memory can be configured as either a single 1GB module or two
512MB modules. The single memory module allows for better
upgrade potential because by adding another module you are
gaining more memory without sacrificing any current memory.
Upgrading the two module situation with a 1GB upgrade would
result in the loss of one 512MB module and a resulting memory
total of 1536MB.
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