I seen the Shorai batteries at the Seattle Cycle Show. I was talking with the sale rep. about them and picked up one that was compairable to a YTZ7s that I thought was just a empty demo. When he told me that that was the real battery
I could not believe it. It felt like a nothing. A friend of mine purchased one and found out that the only draw back is if you have a drain on your electrical system and deplete the charge, that it you can not recharge it.