I have designed, but not yet built a dynamic balancer that will ride along with you keeping the battery in balance ALWAYS.
In support of this I have just finished, an hour ago, a Data Port on the outside of the battery box that will allow me to connect, the instruments I am designing, to the battery without removing the cover. Balancing will be done through this port as the balancer I have designed is for continuous use, not for hit and run as the previous balancing has been done.
I have nothing against Hit And Run, in fact the battery I did this on last month has now been running for over a month now with only 2 RECALs in the first few days. It has been stable since then running from 7 bars to 20 bars and back many times. I have not tested the bottom to see how far it will go, but remember, this was a battery declared dead by the dealer and left to rot for some time in a garage.
However, after the original Hit and Run, I think its life will be greatly extended by dynamic balancing.
Pictures of my Data Port installation can be seen at
Picasa Web Albums - Jim they are the last three pictures in the Honda Insight album.