I've got two Interstate 8D batteries. Originally purchased July 2019. Were used as start batteries in an emergency generator, so have seen very little use. I bought them 2nd hand from my work, but they are far too big and heavy to work for my boat. These are "Mega Heavy Duty"... so if these dont start yer motor, the problem ain't the battery! Can be used in applications other than boats too. Group Size8D Part Number8D-MHD Cold Cranking Amps1400 (RC) Min @ 25 Amp450 Cranking Amps1750 Length 20 3/4" Width 11" Height 9 5/8" Weight 132 lbs So these are big, heavy real-deal batteries. An awesome deal if you need these! $150 each Cheers.