Battery fluid consists of sulfuric acid diluted with distilled water. Some of this water can evaporate or split into hydrogen and oxygen during the charging process. Therefore, in traditional car batteries, it is necessary to top up the liquid level regularly.
Serial batteries «Freedom», installed in the Vectra are completely closed, i.e. do not have battery plugs. Antimony-free battery plates and a separator in the housing cover that collects liquid and sends it back, do not allow the usual evaporation of water. The service life is extended due to the stable acid level. This type of battery is completely maintenance free.
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