How to choose a
suitable AC Adapter for your
laptop?
You should be very cautious when
you buy an AC Adapter for your
laptop. If you try to power your
laptop using an inappropriate AC
adapter it will damage your
laptop. There are three primary
factors you need to consider
before buying; namely voltage,
amperage and tip size. Determine
the desired output
specifications of the AC
adapter. This can usually be
found on the old adapter. When
selecting an adapter, you will
want to match these as closely
as possible.
Instructions:
Step1:Identify
the voltage. Next to the word
"output", you'll see a number
with a "V" after it (such as
19V). This is your voltage.
Step2:Identify
the amperage. After the volts,
there will be another number
with "A" after it (such as
1.58A).
Step3:Determine
the size of the adapter plug.
Plug sizes are normally measured
in millimeters.(Such as 5.5 mm *
2.5 mm)
Choose an adapter that meets all
of the above three requirements:
proper output voltage and
current, proper plug size, and
proper power cord.
If an exact match is not
available, it is better to err
on the side of the new adapter
having a higher current than the
specifications require. For
example, if the device calls
for19 V 3.16 A, it is Ok for the
new adapter to provide 19 V
4.74A (higher current) .
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