Spiralcell Design
Each individual cell contains only two plates, one positive and one negative.  These thin lead plates are wound into a tight spiral and separated by an absorbent glass material. This material is very thin allowing for the lead plates to be closer together.  The close proximity of the lead plates enhances the flow of electrical current and lowers the batteries internal resistance delivering higher amounts of power.

The tightly wound cell locks the lead plates in places allowing the Optima to use a higher purity lead that requires fewer alloys to strengthen the plates.  With higher lead purity the grid resists corrosion and lasts longer in high temperature environments and lowers the internal resistance.

With this design the Optima can use thinner lead plates allowing more winds per cell increasing the amount of surface area in the cell.  This increases the amount of energy stored in the battery.

Sealed Case Design
The spiralcells are pressure-inserted into the individual cylinders.  There is no free space between the plates preventing shorting between the plates and damage due to vibration.

Once the cells are fitted, electrolyte is injected into each cell and is absorbed by the porous glass separator material like a sponge.  This locks the electrolyte in preventing spilling or leaking even if the case is ruptured.  It also prevents the active material on the plates from drying out.

With the Optima completely sealed you get a battery that eliminates corrosion, can be mounted in any position and requires no special storage or handling procedures.