Regarding power density...not so sure that agms have lower
power density is exactly correct..
My Crown1 agms have performed very well for me...my 8x6volt pack
have accumulated over 6500 miles in 2 years...where flooded lead acids
may have shown to drop performance as soc declines toward the 50%
mark...where as my Crown1 agms no such thing...every night after
using my cart during the day...they go on charge...and I do balance -
equalize charge monthly.
A lot has to do with the quality of the lead plates used in the batteries.
Crown has done a great job in this regard. They use thicker plates..
Battery amp hour capacity has a lot to do with service life and run times.
Mine are the 6 CRV 260 ah size...
It is however my own experience that a Eagle Pro charger be used
on the agms as a Lester Summit II 650 charging profile...consistently
overcharged my former set of Crown1 agms with a continuos 68 volt
phase 2 unending charge cycle....fried my batteries...fortunately
my dealer was very supportive..
Yes the agms are more expensive but the advantage of being maintainance
free is well worth the price...
Talk about expensive and problematic are the lithiums ...they are
getting better...juts not for me ..yet..
You might like to take a look at this from Crown batteries...
https://www.crownbattery.com/hubfs/D...Deep-Cycle.pdf
https://www.crownbattery.com/hubfs/D...Deep-Cycle.pdf
Best wishes
Happy cartin'