All batteries supplied by First National Battery can have battery filling systems fitted as an optional extra.

These systems allow for topping up of batteries in an efficient and trouble free manner. Electrolyte levels are easily monitored via the visual float level indicator.

All vent plugs allow for easy specific gravity checks once the lid is lifted.

Frequent cycling of batteries can cause electrolyte stratification. By circulating
through the electrolyte during charging this problem can be eliminated with the
following benefits:

	less gassing and therefore reduced water loss during the charging cycle.
	charging time is reduced by as much as one third and therefore a reduction in energy input results.
	temperatures during charging are lower, thus extending battery life.