What the M in Group 24M, 27M and 31M Means
What 24M, 27M and 31M mean on marine batteries: the marine "M" suffix, dual terminals, how it differs from automotive sizes, and how to…
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Group 24 Marine Batteries: Fit, Capacity and Options
Group 24 marine battery guide: size, typical capacity and cranking ratings, lead-acid vs lithium options, and which boats a group 24 suits best.
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Group 27 Marine Batteries: Fit, Capacity and Options
Group 27 marine battery guide: size, typical amp-hours and cranking ratings, deep-cycle, AGM and lithium options, and the boats a group 27 fits best.
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Lithium Batteries in Standard Group-Size Cases
Lithium battery group sizes for boats: group 24, 27, 31, GC2 and 8D lithium options, how much capacity each holds, and fit tips when…
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Group 31 Marine Batteries: Fit, Capacity and Options
Group 31 marine battery guide: size, stud terminals, typical capacity and CCA, AGM and lithium options, and when a group 31 is the right…
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How to Measure Your Battery Compartment
How to measure a boat battery compartment before buying: length, width, usable height, terminal clearance, hold-downs and cable reach, plus a checklist.
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Group 24 vs 27 vs 31 Marine Batteries
Group 24 vs 27 vs 31 marine batteries compared: approximate size, typical capacity, cranking, weight and which size suits your boat and battery box.
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GC2 Batteries on Boats: 6V Golf-Cart Size Explained
GC2 golf-cart battery guide for boats: what GC2 and GC2H mean, 6V flooded and AGM options, 12V lithium GC2 batteries, wiring and when to…
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4D and 8D Marine Batteries: Big Cases for Big Loads
4D and 8D marine batteries explained: size, weight, capacity and cranking, where they're used, and how lithium 8D batteries cut weight on big boats.
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