Many consider 8D's to be a combination of deep and starting. Course-there are dedicated starting batteries (with many thin plates for concentrated jolt for starting) and there are deep cycle batteries (fewer thicker plates that retain amps but are slower to release). You can use the 8D for deep cycle-but if it is a designed starting battery, will just have a shorter life. Which ever battery you use, should not allow the battery to go below 12v without a load on it.
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1983 Newell Coach
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