I put a cheap Chinese lithium battery on my old Honda as an experiment. I suspect a lot of the Chinese so-called "lithium" batteries are in fact cheap nickel-cadmiums, judging by the way they keep a charge. I have a 4-cell on my CM250 that does the job but tends to run down if left for a few days, just like an NC bat. Glad I have a kick starter. Not willing to take it apart to see because of the toxic chemicals inside. It's super small and lightweight though. Currently out of the bike and on a li-ion maintainer. Any charging off the bike should be done in ceramic bowl. Things have been known to catch fire without warning.