I also had excellent like with my Turbostart group 27 years ago...like 8-10 years with light use and indoor winter storage with a battery tender.
DynoDave Walter P. Chrysler Club - Great Lakes Region Member # 12304 1970 Plymouth Duster 1972 Dodge Charger Rallye https://wichargerguy.proboards.com/ 1977 Chrysler Cordoba