$1700 starter battery (N/A)

[wbarnhill]

http://www.motorauthority.com/blog/...ter-battery-option-for-boxster-spyder-911-gt3

Perhaps only Porsche, with its long legacy of pricey options, could consider charging $1,700 for a starter battery.
To be fair, this isn't just any old 12-Volt lead-acid starter battery. It's a lightweight, lithium-ion pack with a similar form factor and the same mounts as a standard battery. It's not only 3 inches lower, but also--at 13 pounds--a full 22 pounds lighter than the original.


...


Its one weak point is low-temperature performance. Porsche actually provides a lead-acid battery to go along with the lithium option, since the old style works better once temperatures fall below freezing.

So you don't get a weight benefit... except in your wallet.