I have had great luck with Lithium Pro and light weight XS batteries but both are 16 volt. We run an light weight Odyssey in the heads up car, it weighs 14lbs. Same battery was used in the car when it was a street car and never an issue. We are changing it out this year as since it has become a race only car and has 8 O2's it is just not as happy as it used to be. We ran a small 12 volt Turbo Start in it the last race of the year and there were zero issues. I have also used that battery in the dragster with no issues.