Before buying my Insight, I spent about six months researching battery issues with the car.
That said, I took the time to get a proper trickle charge setup in the car, and I now charge the battery nightly before heading off to work.
Take a look at the link below for details...
https://picasaweb.google.com/threewh...rickleCharging
After doing this, and starting to trickle charge nightly, the battery is vastly stronger, especially after the first 20 cycles or so.
I am finding that the battery likes ambient temperatures below 70F or so too.
Jim.