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| Gutter Guards Gutter Helmet protects your home with a gutter protection system that covers your rain gutters and keeps them clean. Our site includes an FAQ, plus information on how the gutter protection system works, installing Gutter Helmet, warranties, and how it protects your gutters and home. - Read more http://www.gutterhelmet.com/ |
| 0 Reviews. Rating: Total Votes: 0 | |
new HP laptop battery |
| Date Added: 2009-12-25 12:05:59 |
| Author: brdooke766 |
| Category: Real Estate: Resources |
| A lot of people, especially business people, travellers and students, can hardly imagine their life without the laptop. Since it is portable, it can be taken on board a ship to view films or send/receive messages from co-workers or business partners. Nonetheless, the laptops cannot function 24/7 non-stop. Now and then the laptop battery needs re-charging. Hardly has anybody thought, when the first laptop battery was made and what it looked like. In fact, the history of laptop batteries is an exciting one. They have already come along way, but they still have a long way to go to perfection. When we think of laptop batteries, many of us think about the rechargeable ones that are deployed today. Nevertheless, several decades ago AA batteries were extensively deployed in laptops. It took a lot of AA batteries to run a laptop. More than that, it could not run for long. Some people remember the heavy lead acid based batteries that did not only last long, but also made a laptop exceedingly heavy. Since then the manufacture of laptop batteries has been updated and upgraded. Lighter nickel cadmium batteries (NiCd) replaced lead acid based ones. Nonetheless, these batteries were not deployed long, since nickel metal hydride batteries (known as NiMH) were introduced. They lasted far longer and were lighter. Their downside was that they had the so-called memory effect. If not discharged completely, the NiMH battery remembered it and its output was lower. When lithium ion batteries (LiON) appeared on the market, customers saw a tremendous advancement in laptop batteries manufacture. These batteries are light and have no memory defect. They are deployed in laptops of the next generation. Even though LiON batteries run non-stop for several hours, they need re-charging. Because more and more people get laptops yearly, the demand for durable batteries is quickly increasing. Surely, there will be improvements until batteries that never go dead are produced. Regardless of the purpose you use a portable computer for, you know that you need a long-lasting battery. You have to know that you can count on the battery when you need your laptop most of all. |
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