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What is the best battery for laptop ?

When buying a replacement laptop battery, the buyer often has the choice of different battery chemistries. Li-ion and Li-ion polymer batteries are used on newer hp pavilion dv7 laptop , whereas the NiMH and NiCd are found in older models. If the buyer has a choice, the sales person may advise a customer to go for the highest capacity rating and to stay away from the NiCd because of the memory effect. The customer may settle for the slim-line NiMH because it offers relatively high capacity in a small package and is reasonably priced.
Nickel-based batteries, especially NiCd�¡�¯s, should be fully discharged once per month. If such maintenance is omitted for four months or more, the capacity drops by as much as one third. A full restoration becomes more difficult the longer service is withheld.
Is the Li-ion a better choice? Yes, for many applications. The Li-ion is a low maintenance battery which offers high energy, is lightweight and does not require periodic full discharge. No trickle charge is applied once the battery reaches full charge. The Li-ion battery can stay in most chargers until used. The charging process of a Li-ion is, in many ways, simpler and cleaner than that of nickel-based systems, but requires tighter tolerances. Repeated insertion into the charger or cradle does not affect the acer aspire one series battery by inducing overcharge.
more info: http://www.cheap-laptop-batteries.com

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