I was checking out batteries at NAPA the other day and noticed that a "commercial" 31P battery might fit in place of my group 49.

BCI 31P:
1190 CA
950 CCA
Height 9 1/2 in.
Length 13 in.
Width 6 3/4 in.
Battery Weight 56.5 lbs
$87

BCI 49:
1000 CA
825 CCA
Height 7 1/2"
Length 13 15/16"
Battery Weight 43.3 lbs
$157







The only issues I see that its 2" taller and mounting it to the battery tray. The W124 easily fits the extra height and I would have to figure out how to strap it down. A lot of diesel truck people are swapping these batteries since they're cheaper, easily available and out crank anything else that fits. Has anybody else tried one of these in an MB diesel?

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