This is especially critical in a series configuration because a battery is only as strong as the weakest link in the chain. It is important to use the same battery type with equal voltage and capacity (Ah) and never to mix different makes and sizes. Most battery chemistries lend themselves to series and parallel connection. Insulating foil between the cells prevents the conductive metallic skin from causing an electrical short. Such a configuration is called 4s2p, meaning four cells in series and two in parallel. Laptop batteries commonly have four 3.6V Li-ion cells in series to achieve a nominal voltage 14.4V and two in parallel to boost the capacity from 2,400mAh to 4,800mAh. Some packs may consist of a combination of series and parallel connections. Parallel connection attains higher capacity by adding up the total ampere-hour (Ah). BU-302: Configuraciones de Baterías en Serie y Paralelo (Español)īatteries achieve the desired operating voltage by connecting several cells in series each cell adds its voltage potential to derive at the total terminal voltage.
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