More electrons please

Some time back, I had the brilliant idea of installing a new lightweight battery in the Porsche. The mental salve for such a purchase was that the stock battery was 4 years old and thus on the brink of complete failure. That it never exhibited any of the warning signs of a battery in stress (failure to hold a charge, low cranking power) was of no issue. Perhaps because the purchase of a new battery would allow me to reduce the weight of the battery by more than 50%, a heightened coefficient of cool (to an auto-aficionado), and would create the need for a bit of mechanical design work.
Surveying the market options, there were three brands to choose from. At the ultra-high end was a lithium racing battery. Despite weighing in at under 14 lbs, at $2k-$3k, even I could not conjure up a justification for one of those beauties. The standard choice used by many Porsche owners is an Odyssey battery with matching mounting bracket. As an aside, my desire to replace the stock battery has a tincture of validity. For whatever reason, those otherwise brilliant teutonic engineers chose to put a massive heavy battery in the car. And mounted it relatively high off the ground. More than 50 pounds high above the center of gravity. There must be some hidden reason for their choice, but it remains a mystery to every Porsche enthusiast. The Odyssey weighs in at under 20 lbs., with an extra pound or two with it's optional mounting bracket (more on that later). Altogether, a proven choice. Which leads me to the final option. A carbon-fiber battery made by a company with the odd name of Braille. Very high on the cool/gadget scale (CF for a battery?) and obviously imparts otherworldly capabilities in the car such that even a blind person could drive it. Also at about 20 lbs., with no bracket, it would knock about 60% off of the weight of the stock piece. So, though it was not commonly reviewed by the experts, and requiring some personal mechanical engineering to fashion a bracket, I took the mid-priced road less traveled.