Battery discussion

I just run 2 Autozone 12-volt units in my trunk. The weight doesn't really hurt back there. I've also done the 16-volt thing, and went thru 4 batteries in 2 years. My friend's ultra lightweight sportbike caught fire while we were at a lunch stop. NO idea why, but it had a lithium. I had them in 2 of my bikes without issue, but replaced them after his deal. Batteries are funky things. My dually that was built in 10-2002, still has the originals.