Maintenance of a portable computer battery , as for other rechargeable devices, is subject to a number of "myths and legends". When should you recharge the Dell inspiron 1501 battery ? Should we wait for it to be completely discharged? Will a complete discharge "restore" or "repair" a battery whose autonomy become weak ?In reality, the maintenance of of a portable computer battery depends on its type. It distinguishes four: Ni-Cd (Nickel and Cadmium), Ni-Mh (Nickel and Metal-hydride), Li-ion (Lithium-Ion) and Lithium-polymer. Each type requires a different maintenance and use. Thus a lithium laptop battery generally has lower life but a maintenance less binding than Ni-Cd or Ni-Mh batteries.

Before reviewing the different types of laptop batteries, we should speak of the phenomenon that is causing a few misconceptions: the memory effect. it concerns only the battery type ni-cd and the least recent ni-mh. There are two memory effects. the first is one in which a battery "remembers" the load level to which the user performs a refill. "Accustomed" to be charged at this particular level, the Dell inspiron 1520 battery will not run beyond this threshold will remember it. Since it is virtually impossible for a user to drain his laptop battery , at the same level with sufficient accuracy, this memory effect is extremely rare. the second type, also called "false memory effect", it is much more common. there is a formation of crystalline material which reduces the capacity of the battery. This chemical phenomenon is caused by electrical overload.

Ni-Cd (Nickel Cadmium): Ni-Cd Dell inspiron 1300 battery is almost used. More resilient in difficult climatic conditions and with a longer life (up to 1500 cycles of charge/discharge), it is unfortunately sensitive to the memory effect.Maintenance: no systematic full discharges. periodic deep discharge to do to repair the effect of crystallization. has to do with a camera charge / discharge adequate.

ni-mh (nickel metal hydride): a Hp 484171-001 battery of this type provides about 40% more capacity compared to the no-cd volume equivalent (mah). ni-mh battery is a little lighter, is not subject to memory effect and a possibility of 600 to 700 recharge cycles.Maintenance: no systematic full discharges. periodic deep discharge to do to repair the effect of crystallization. has to do with a camera charge / discharge adequate.

Lithium Ion (Li-ion): although a higher cost than other types and a lower lifetime (500 to 600 cycles of charge / discharge), the Dell inspiron 1545 battery is Li-ion currently the preferred choice of builders. has equivalent capacity, it offers a weight and size to a much lower energy density twice as high as a ni-cd or ni-mh battery . it is not prone to memory effect.Maintenance: full discharges should be avoided! avoid the full charge cycles and may even favor the point loads of minutes.

Lithium polymer: it is the latest technology of Dell inspiron 1440 battery . its characteristics are identical to the li-ion but it offers greater density electro-chemical, a very low self discharge and lower weight. uncommon because of its sudden, this type of battery certainly will equip future laptops providing them with even greater autonomy. it is not prone to memory effect.Maintenance: full discharges should be avoided! avoid the full charge cycles and may even favor the point loads of minutes.

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