Computer Security News

The laptop computer power adapter as also known as power supply and is usually molded as a brick.  This adapter converts high voltage  electricity from a wall outlet into low voltage  DC which is needed to power your notebook.

A laptop battery charger provisions the proper amount of voltage for the laptop to power on, charge the battery and run the various other parts that make up your notebook. It is very important to purchase and use the proper adapter.  Using an incorrect adapter can cause damage to your notebook or simply not power it on as it should.  As for Dell laptops , for example, the Dell laptop battery charger has a tag with a barcode on it.  The Dell part number is imprinted on this sticker and it begins with “CN” or “D/PN” followed by a series of numbers.  The first set of numbers is 9 times out of 10 your allocated part number.  With this information at hand you can search for the correct OEM Dell replacement battery adapter .

If you want to buy a new adapter, check the following notes:

1. Your new adapter  needs to have the same plug (adapter tip) as the original one.

2. Your new adapter  must output the same voltage as the original one.

3. The polarity on the new adapter’s plug must be the same as on the original  one.

You can locate the output voltage and amperage on a label behind the adapter.  Also when you buy a new adapter, you can follow this simple rule:

The output voltage must be the same, the amperage can be the same or higher than the original unit.  For example, if your laptop requires a 19v-3.42A adapter, you can safely use a 19v-3.95A charger.

Want to test or repair a laptop AC charger?

Most newer laptop power chargers are sealed and you cannot open and repair them.  If the adapter is bad  it is highly recommended, and usually much more cost effective, to purchase a new one.

How can you tell if the AC charger is dead?  Well, you can try testing it with a voltmeter.  Let’s say you are testing a 15V adapter and the output is 15.45V.   That is normal and there is nada actually wrong if the output voltage reads a bit higher.  But, if you are getting 0V, the adapter is definitely DOA or “dead.”

2. Now, if you unexpectedly have broken  the adapter plug, you can try exchanging it with a new one.  Just make sure the new tip has the same size as the old one.  Remove or cut off the old damaged plug and solder on a new one.  It is wise to have some sort of technical skill before attempting to repair the battery charger.  Always unplug the battery charger from the wall outlet before attempting a repair.