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betty320 (diggingshop) wrote,
@ 2009-08-14 15:59:00
Previous Entry  Add to memories!  Add to Topic Directory  Tell a Friend!  Next Entry

    how to buy new laptop battery
    Collected by www.diggingshop.com

    So, do you wonder what you can do before buying the new dell inspiron 1525 battery to prevent waste and lower the environmental impact of your hand. Here will provide some of the recommendation for you.


    Buy batteries that have less mercury and heavy metals. The batteries now are reformulated to reduce the usage of mercury. Some batteries such as the alkaline have had about a 97 percent mercury reduction in the product. Newer alkaline batteries may contain about one-tenth the amount of mercury previously contained in the typical alkaline battery. Some alkaline batteries have zero-added mercury, and several mercury-free, heavy-duty, carbon-zinc batteries are on the market.


    Try to not buy more batteries when you already have enough battery on hand. Most of the people likes to buy more batteries and store it at home but it will not be using in some time. This is a waste and will increase the risk of battery pollution in your house.


    Consider using of rechargeable batteries. Rechargeable batteries as dell xps m1530 battery has longer life span and use fewer batteries. However rechargeable batteries still contain heavy metals such as nickel-cadmium. When disposing of rechargeable batteries, recycle if possible.


    Lastly you must look at the power rating of the item you’re buying. As technology advances, so do power ratings. The battery you bought last year may be twice as strong this year, and might even be the same physical size. Batteries have two main ratings on them: Volts and Amperes. Because battery do not carry a very large amount of power when compared to larger batteries such as car batteries, most companies show their ratings with Volts and Milliamperes. One thousand Milliamperes equals 1 Ampere. When buying a battery, always go for the battery with the most Milliamperes (or mAh). Batteries are also rated by Watt-Hours, perhaps the simplest rating of all. This is found by multiplying the Volts and the Amperes together. We will now show you an example of finding the Watt-Hours for our example battery.


    Our example battery is 14.4 Volts, 3600mAh

    (remember that 3600mAh is equal to 3.6 Amperes).


    14.4 x 3.6 = 51.84


    This battery has 51.84 Watt-Hours. The term Watt Hour signifies the energy needed to power one watt for one hour. Thus this battery can power 51.84 watts for one hour. Suppose your laptop runs at 25.92 watts (this may be unlikely, but let’s use this just for simplicity). This battery could power your laptop for 2 hours. People usually associate the word ‘Watts’ with light bulbs, and yes, this battery could power a 40 watt light bulb for about an hour and 18 minutes, a 60 watt light bulb for about 52 minutes, or a 100 watt light bulb for 31 minutes; it’s the same idea.


    The reason we have shown you watt-hours is because oftentimes the volts and Amperes vary. For example our laptop that uses a Li-Ion 14.4 Volt, 3600mAh battery may use a NI-MH battery that is 9.6 Volts, 4000mAh. Now let’s do the math and find out which laptop battery is stronger.


    Li-Ion: 14.4 Volts x 3.6 Amperes = 51.84 Watt Hours

    Ni-MH: 9.6 Volts x 4 Amperes = 38.4 Watt Hours

    The Li-Ion is stronger.



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