Originally Posted by nulluser
Heh, I was thinking about electric vehicles when I read the thread.
For a regular motorcycle, the most important thing to me is the self discharge rate. I would love to be able to park the bikes over the winter and never have to worry about starting them in the spring.
if self discharge is your most important criteria ... then a sealed battery like AGM will do the job. provided there is no ghost discharge (disconnect battery for long term) a new AGM battery will discharge at 1-2% .. so let's call it 3% self discharge per month. no battery tender needed.
lithium iron phosphate cells discharges at 2-3% per month (5-10% per month with smart circuits). note a gel cell battery is best at deep discharge applications. NO battery should discharged to completely dead. permanent damage typically occurs.
AGM and gel cell batteries are similar that both are sealed. they are not the same. Gel batteries should not be charged at over 14v ... permanent damage will occur.