"Question: Sounds tempting, Ed, but with the shorter warranty, do you think you'll be replacing yours every 2-3 years or so? Was installation simple, requiring any adapter? Where'd you get yours?"
I got mine directly from Braille. I have only had the car for 2.5 years and have not had to worry about replacement yet. I got mine a couple of years ago and the mounting options were not what they are now. There a number of good inexpensive mounting solutions at the Braille website.
Mine was a bother to mount back when, because those mounting options were not available. I am using parts from a Porsche Turbo in my Boxster, that is the exhaust bracket from a Turbo was modded to hold my battery in place (see photo).
Ed