Lithium Ion Batteries are becoming more and more popular in spacecraft, due to their high power per mass ratio. There are several companies, such as Quallion, advertising their space rated batteries. What is the proper way to charge them to optimize battery life, and prevent fires such as occurred in the Boeing 787 Dreamliner?
For example, the ISS is planning on launching them in 2016, as are several other missions I am aware of.