Originally Posted by jr's3800
In the newer bonneville'* the battery is under the rear seat... This way it will be less proned to failure... the batter will be exposed to less heat and less cold, and supposedly less vibration.. Therfore its supposed to last longer... New ideas I guess...
That is true. It also helps a little with the weight distribution.
I would assume the battery is a 60 month battery. Since is so well protected, you may get more, but I wouldn't push it. Five years is a long time and Bonnie'* have a pretty heavy-duty electrical system. As far as a replacement being available, it will just take some time before OEM'* start having a large enough demand to justify making and stocking the newer sizes.