How To Buy A Laptop Battery
Don't go in for a Ni-MH battery if you have a choice between this and a Li-Ion
or Li-Poly battery because the Ni-MH battery weighs much more than the rest and have a lower power to weight ratio, meaning it delivers less power than its lighter weight counterparts. Li-Ion and Ni-Poly batteries are the most advanced and last longer. So try for one of these two technologies.
Some laptops are designed to use the kind of battery it originally came fitted with, this means if it came with a Ni-Cad battery it must be replaced with a Ni-Cad battery. This is because the internal circuit of the battery must match the laptop hardware for optimum charging and discharging. However, this is not always the case so check with your manufacturer of the laptop if the battery can be interchangeable.
Determine which cell size of battery you need: The cell size of a battery determines how much of a charge it holds once disconnected from a power source. Most laptops come standard with a 6 cell battery, but you can also get laptop batteries with 9 cells or 12 cells. You can determine which cell count you have currently by removing your battery from your laptop and reading the product information on the outside of it.
Many batteries are rated in watt-hours. This is perhaps the simplest way to rate a battery. The wattage of a battery is calculated by multiplying the voltage by the amperage so a battery with a 14.4 volt rating and an ampere rating of 3600mAh (3.6 Amps) will have a watt rating of 51.84 watts (14.4X3.6 = 51.84).
Sometimes the power ratings in volts and amps on a battery vary. For instance a laptop that runs on a Li-Ion 14.4 Volt, 3600mAh battery may be able to run on a Ni-MH battery with a 9.6 Volt, 4000mAh rating. The Li-Ion battery will be stronger even though the amperage ratings are lower. Here is why:
As the laptop battery life and after-sales warranty are two important factors for your consideration, in this case, we could not buy the laptop battery, just considering for the one-time price. We must look into both of these two. For example, to buy a 6-month warranty battery, the price might be USD 65; to buy a one-year warranty battery, the price is USD 79. From the data it is clear that the former is much dearer.
Locate the make and model of your laptop computer: The make and model of your laptop computer should be in plain sight on your computer. On many Dell laptops the make and model are listed near the power button. Many other models, including HP and Toshiba, have the make and model information near the power button or on the top of the computer.
Another important issue to look into is the type of battery to buy. Laptop batteries are usually of four types: the Ni-Cad, Ni-MH, Li-Ion, and Li-Poly. The Ni-Cad is more of a primitive type of laptop batteries and is not manufactured by any major manufacturers. Although Ni-MH is a newer and advanced battery type it ranks lower than Li-Ion and Li-Poly when it comes to current produced. These two types of laptop batteries, Li-Ion and Li-Poly, are most advanced type and you should try to get them if possible.
Keep in mind to look for power rating of the laptop batteries as well, the volts and amperes. If not compatible to your laptop you should not use them under any circumstances. Remember at all times you can ask the store keeper for clarification about the product you are buying and whether they are compatible to your system. Don't buy if you are not satisfied with what you hear.
by: judy
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