Reverse post design - best for Boxster and 944.
Positive lug is on the right side (this image is not correct for the reverse post battery)
Inside this unusual battery is a six-pack of SPIRALCELL TECHNOLOGY®. Traditional batteries have a stack of thick lead plates surrounded by acid. But OPTIMA® batteries feature two thin lead plates wound into a tight spiral cell, with an absorbent glass-mat in between to hold the electrolyte solution.This unique design allows for more power and increased energy, resulting in quick, reliable starts. OPTIMA batteries are the first and only batteries to feature SPIRALCELL TECHNOLOGY.
This battery is a "Universal Fit" product. Some minor modification will likely be necessary to make it work in your car. Installation in certain vehicles may require enlarging the hole in the adapter bracket, or changing your battery cables.