Join Date: Nov 2014
Location: Sequim, Washington
The PO of my 2013 650 installed a lithium battery. I rode with it for about a year before I even noticed it.
The only reason I did finally realize that it was a Li battery was because when it finally got "cold" here in the Bay Area (probably about mid 40's to 50 deg F) the bike seemed to crank slow. I replaced it with a new Yuasa AGM and the cranking speed was back to normal.
Yes the Li battery was crazy lightweight compared to the AGM, but the only time I noticed it was removing and installing. The few pounds of weight savings is imperceptible to the ride, especially considering all of the other crap I have on the bike. Like most farkles, I think there's a large placebo effect.
I will say that being able to notice the difference in cranking speed at such a mild "cool" temperature between the batteries convinced me to stick with lead/AGM.
For what it's worth, they both metered at good voltages at rest, I don't remember what the exact figures were, but I remember checking and not having any voltage difference between the two batteries and being surprised by that, considering the difference in cranking speed.
'13 dl650A, 2014-present
'07 FJR1300, 2009-2013
'84-ish Honda CB400, 1994-1998