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A lithium-ion battery pack consists of several cells on the basis of the voltage and power requirements of the device in series and parallel. In HP notebooks three different types of lithium-ion Dell XPS M1730 battery are used: cylindrical, prismatic and polymers.

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Cylindrical cells have a diameter of about 18 mm and 65 mm long. It is commonly referred to as 18650 cells. These cells are often used in battery packs that are about 20 mm thick.
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Prismatic cells are narrow and rectangular. The most common types are lithium-ion Dell Latitude D510 battery packs with six or eight cells, which is about 12 mm thick, z. B. HP MultiBay and batteries for Tablet PCs.
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Polymer cells are thinner than prismatic cells. They are often used in products such as the iPAQ Pocket PC and some ultra-mobile PCs, the battery pack may not exceed 10 mm thick.

Lithium-ion Dell Latitude E6400 battery are lighter, save more energy and keep their charge longer than nickel batteries of comparable size. In addition, lithium-ion batteries are recharged before they are discharged, they are not from the memory effect.
It takes charge system-off 2.5 to 3 hours until a typical lithium-ion battery pack 6-cell up to the maximum voltage. If the DELL XPS M1530 battery is fully charged, the current flow is stopped to the battery through an integrated protection circuit (loading control). The protection circuit prevents the battery is charged by the solid values ??out or discharged.
Although the protection circuit uses an operation, a small amount of battery power, but is the self-discharge rate of the lithium-ion Dell Inspiron 1525 battery only a fraction of the nickel-based batteries. Some conditions that increase the self-discharge rate of lithium-ion battery and should be avoided, in the section What is the battery capacity? of this document.