I looked a lot into Lithiums recently, and came to the same conclusion everyone else did - you basically have to build your own system from scratch. Those drop-in batteries will die horribly without the surrounding infrastructure correctly set up, and by the time you do all that stuff you may as well buy cells and setup your own battery for 1/3 of the cost of the pre-made.
I'm still going to do it since I love that stuff, but it requires a fair bit of reading and research.
I'm still going to do it since I love that stuff, but it requires a fair bit of reading and research.