Forum Discussion
wa8yxm
May 22, 2014Explorer III
both Interstate and Duralast are made by Johnson Controls at least on the eastern half of the nation.
So.. The difference may be anything from major quality to ... Just the paint job.
By the way the 31 in the battery model number is the size and shape. all 31's should fit in the same tray. Group 31, about 130 amp hours at the 20 hour rate (C/20) and a specific size, The rest of the model number specifies if it's a Deep cycle or not (marine/deep cycle is NOT deep cycle) and if it's flooded, maintenance free or AGM.. But the 31 specifies the size and shape.
So.. The difference may be anything from major quality to ... Just the paint job.
By the way the 31 in the battery model number is the size and shape. all 31's should fit in the same tray. Group 31, about 130 amp hours at the 20 hour rate (C/20) and a specific size, The rest of the model number specifies if it's a Deep cycle or not (marine/deep cycle is NOT deep cycle) and if it's flooded, maintenance free or AGM.. But the 31 specifies the size and shape.
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