Heat is the real enemy of battery life. With the battery in the front, away from the engine & exhaust system, a battery should last longer in an NSX than in most cars. And compared to what it takes to crank my '84 Corvette, for example, the NSX is relatively easy to crank.
It was a Florida car however, with no real winters.
As long as the car was garaged and not driven in stop & go traffic (and having met you and seeing how discriminating you are, I'm sure that was the case:biggrin
, then life in Florida was good.
Note that batteries often fail in winter for the following reasons:
1. Battery capacity drops with temperature (but recovers as temp goes up again)
2. Starter resistance drops with temperature, and so starter current increases at low temp.
3. A cold engine is harder to crank.
Summer heat causes the battery to permanently lose capacity and life, but the warmth of summer makes it easier for a weakened battery to crank the engine. Then winter comes along, and the previously weakened battery is not up to the task.
I looked at my battery and see only the Acura name on it. If there is a manufaturer's name on the battery, it probably can't be seen without removing the battery. I need to do some routine preventative battery terminal & tray cleaning once the weather warms up a little. I'll look for a possible name then. (Its most likely one of the big 3 or 4 manufacturers, such as Johnson Controls, etc).