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Question about AC / DC Adapters ( From internet ):

What is the advantage of using AC and using DC current?

Simple answer first: Advantage of using AC: 1. Generation, transmission and distribution with AC is simpler than DC. 2. AC supply can be stepped or down very easily and efficiently as compared to DC Advantage of DC:  1. Energy can be stored in electric battery cells. Battery cells provide dc supply. There is no any battery cell providing AC supply. 2. Almost all the electronic equipments operate on DC supply. 

Why we need a Back Up Laptop Charger?

As busy people on the go, we find ourselves ditching the traditional desktop computer and utilizing laptop computers for work. People can take their work to the office and back home and students can take legible notes in class on their laptop. However, one aspect of a laptop that is just as essential as the computer itself is the laptop charger.

Why is a laptop charger so essential? Well, think about it. What do you do when your battery power lasts only a couple of hours? You have to be plugged in somehow and that is what the laptop charger is for. Laptop charger adapters not only recharge a laptop computer battery but can also be an additional power source if you remove the battery pack from your laptop. Many times a power cord comes along with your original purchase of a laptop computer but it is not a bad idea to have a back up in case it were to go bad.

Once your laptop computer goes dead, there is no other way to revive it other than putting it on the support of a laptop charger power supply. If your computer is dead, there is no other way to access all of the work you have done on it nor open files that may be on your desktop. This leaves you without access to your work and delays your productivity.

Sometimes the power cord goes bad just out of the blue. It stops charging your battery all the way or within a timely fashion. It could be a result of being left in extreme hot or cold temperatures. Another reason for its failure could be that the wires are frayed underneath the protective coating if for some reason it has worn off. The other reason a laptop charger may quit working is if it is plugged in for too long, gets hot and just fizzles out from overuse. If you do not have a back up laptop power cord, you will be without your laptop for a few days until you can get your hands on a replacement one.

When looking for replacement laptop adapter power supply cords, you must find one that is compatible with your specific computer. They are usually difficult to find in physical retail stores depending on the type of laptop computer you use. Finding a replacement usually involves an online search to find a compatible one. Manufacturers of your computer will be able to offer you replacement laptop chargers but they are typically extremely expensive.

It is wise to look around for your back up laptop power source at reputable websites that offer valid return policies in case you get a junky cord that does not work from their site. These are typically much less than price of what your computer manufacturer can offer a laptop adapter at but you have to take care to ensure that you are not ordering a product from an online retailer that has poor performing or refurbished products. Often times, you get what you pay for but there are resources out there that do provide excellent products that work well and for a long time.