the article is about an _electrical_ battery that is seasonally heated up for usage and cooled down for the long term storage of the charge contained in it...

the article is about an _electrical_ battery that is seasonally heated up for usage and cooled down for the long term storage of the charge contained in it... i had only heard of molten salt batteries which need to stay hot long term, so they are heavily insulated maybe this article is talking about a primary battery (i.e. electrically not rechargable), which would make more sense