I am running a competitor 8 cell LiFePO4 Battery - really these are all assembled with A123 cells in different cases. Generally I like it and it has done the job. There have been some problems with this technology where the bike sits overnite with temps dropping into the 40s and the battery loses its punch. That's what you have to look out for. Something to think about if you go on a trip. But in summer, no problems. I like this for my VFR, but dont think I would go with it for a big touring bike.