Firstly thanks to Joel for all the work he put into this (and many other) thread. I've had a Shorai in my F800GS for over a year and I have had no issues, but I don't start my bike in really low temperatures. Although I am in Australia it is a bit cold here in winter ... frost down to -8 degrees C fairly common. I usually don't ride unless it is about 4c. I also have a XChallenge with a Shorai, and apart from the 2Kg weight saving, what I really wanted was the battery to stay charged up if I didn't ride it. Bump starting a 650 thumper gets pretty old pretty quickly. Recently I had the XC forks rebuilt with Husky internals and also went on holiday, so the XC was sitting around without forks in the garage for something like 2 months. Last night I got it reassembled to the point where I could start it, but didnt know what it would be like after this time. Very nice Indian summer here a the moment ... 16c, pushed the starter button and it fired up as though I had ridden it yesterday. Very relieved, because I'm sure with the standard battery I woud have been up for a push start. So all I'm saying is that I'm sure that Lithium Batteries have a big place in the future. I'll probably look at an anti gravity next time, but Shorai's service has been very good ... very fast delivery times to Australia.