New on the market ....a Lithium-Iron 270 CCA 6 volt Battery for your Chief, Scout , or Four Cyl. *
The actual weight is 1.21LBS !!
These batteries are able to be stored with minimal care, as long as the bike is riden a minimum of 2 hrs. a month.
More info is listed here: Shorai Power
*You must use a Cycle Electric generator or replace the cutout on your Autolite with a solid state regulator.