A sealed maintenance free battery which does not contain any free electrolyte. The electrolyte in the battery is absorbed by glass fibre mat seperators between the battery plates. This means that in normal usage, the battery cannot leak. Even in the event that the battery is accidentally dropped and the casing is damaged, the battery cannot leak as all the electrolyte is enclosed in the glass fibre mat separators. The type of battery may even be shipped by airfreight. This new line of batteries are offered instead of the current line of AGM batteries.