If you run a trolling motor on your boat or any other accessories that need to be powered (stereo, fish finder, etc), you will need a marine battery. While searching for batteries, you will come across the term battery group size. But what are battery group sizes exactly?
What is the meaning of Battery Group Size?
The term “battery group size” simply refers to the battery’s physical case size. It is a specification that you’ll find on all boat batteries.
It is basically the physical measurements of the battery casing as set by the Battery Council International (BCI). The height, width, and length of a battery specify its group size.
You should be able to locate the group size of your battery on the labels.
Here are a few things to keep in mind about battery group sizes:
- A smaller group size generally indicates a larger battery.
- Conversely, a larger group size generally indicates a smaller battery.