Group 31

The Group 31 Marine Battery will measure almost 13" long x 6.75" wide x around 9.25" tall. Some of these group 31 deep cycle batteries, such as LifeLine, will produce as much as 125 amp hour. The NorthStar dual purpose marine battery boasts 1370 marine cranking amps.

The 31 series battery is a workhorse and meets the needs of serious anglers. It is found in bass boats as well as smaller sea faring vessels.

Made in USA Batteries

Two of our most popular Group 31 AGM battery brands are made right here in the USA. These marine battery manufacturers hail from California and Missouri.

LifeLine Batteries of San Dimas, CA make a genuine thick plate deep cycle marine battery. The GPL-31XT has a reserve capacity of 230 minutes.

NorthStar Battery manufacturers in Springfield, MO and produce a thin plate dual purpose AGM marine battery from pure lead. Their size 31 battery is a true starting and deep cycle beast with a reserve capacity of 220 minutes.

OnBoard Marine Battery Chargers

You may have heard of Guest and Pro Mariner chargers, but what About Dual Pro made by Pro Charging Systems?

The Dual Pro marine battery charger is the absolute best charger you can purchase for your boat's batteries. They are made in the USA and boast the Delta Volt charge profile that has yet to be matched by the competition despite being introduced in 2011!

These waterproof chargers can be purchased as a single 12V output or with 2, 3 or 4 bank outputs for the larger boats using 24 volt or 36 volt systems.

We have done our homework and made sure we are offering the best group 31 marine batteries on the planet. Call and chat with us if you have any questions.