I’ve ran EAM for the better of 10yrs and havnt had a battery swell in several years , even left a battery fully charged (6200) from the end of last outdoor season (October ) till this past week and it didn’t puff . Battery was still sitting at 8.38v
ran 5different backs last summer and stored them (stupidly) in my garage (90deg max ) all
summer with no issues .
Been running his new 6400
packs . Can’t complain any about them