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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:

1. How long will the new main battery power the laptop and How long does battery last?

2. Battery Glossary

3. What does the light indicator mean when charging battery

4. How to discharge and charge laptop battery?

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