I hesitate myself to go to newer technology batteries. One consideration is the ability to perform at the same temperature extremes. As an electrical engineer who has lots of design experience, I know there are always trade offs when choosing a change in technology. Everything isn't always better; maybe only a few, but at the expense of others. Do lots of research is my advice. Check manufacturers 'while papers', or 'application notes', or 'data sheets' that are targeted towards design engineers. That is what I do when designing. Everything is public domain, so should be easy to find on web. If not, call and ask for technical assistance from sales engineer.