Has anyone put a lithium ion battery in their trike? What make and model of trike is it being used in? What issues, if any, did it present? What about fitment? They generally are much smaller than conventional batteries so did you have any problems getting one to fit? When did you do it and how long has it been in use? Where did you get your battery? Do you still use any type of battery tender on it? What brand of tender, if you are using one, are you using and where did you get it? Are you using a lithium ion tender or a standard one? I guess that's plenty of questions for now. Many thanks if you can reply and answer a few of the questions I have about them. I'm in need of a new battery and I'm considering getting a lithium ion one. They supposedly last a lot longer, are much lighter, and hold their charge much better than conventional batteries but I don't know anyone that has one in their bike, trike, or car for that matter. I know they are pricey, but if the life is as good as advertised, they would be well worth it if they perform well in a bike or a trike.