Nope. I just use lead acid. At about 100 quid a battery, and bearing in mind I have seven, it is already over 700 quid a set.
And I don't find they are a problem, I rarely run them down below 90%, if I want serious power I just put the generator on, or do stuff while we are on the move.
The batteries I have have lasted three and a half years, and are still coming up full power on the displays. I am confident they will go on another few years.
Another advantage of lead acid is that they have a good resale value, when they are tired out, I will get at least a tenner each for them.
The acid is actually worth more than the metals on recycle value these days.