The following chart lists the most popular group 4D, 6D, and 8D batteries with their most important features and specifications: Most lithium batteries based on the Lithium Iron Phosphate chemistry feature very low weight, high capacity, but the discharge current is usually limited to 1C, with 2-3C currents being allowed for only a few seconds (even that may be an issue). Note: some deep cycle 4D, 6D, and 8D batteries, although large and powerful, are intended only for (relatively) low current discharge applications and don't even mention their CA/MCA values - don't use them as cranking batteries, except for relatively small engines. Whenever changing the battery (or batteries) always check the battery chemistry, capacity, discharge features, but also its actual dimensions.īecause of their different dimensions and chemistries, 4D, 6D, and 8D batteries vary in weight (~45 - 190 pounds), 20h capacity (200-400 Ah), Reserve Capacity (RC 400-960 minutes), CCA values (~1350 - 2250 Amps, if allowed), MCA values (~1700 - 2700 Amps, if allowed), number of charging/discharging cycles, etc. We emphasize these 'maximum dimensions' since some of the BCI group 8D batteries are closer to group 6D or group 4D, but they are still labeled as 8D battery group and similar. Group 4D, 6D, and 8D batteries are large batteries with their maximum dimensions (L x W x H) of: Group 4D, 6D, and 8D Batteries Features and Specifications
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