Best Group 31 Trolling Motor & Deep Cycle Battery Review

When it comes to finding a reliable power source for your trolling motor or deep cycle battery needs, the Group 31 size is one of the most popular and versatile options on the market. In this article, we will explore everything you need to know about the Group 31 battery, and recommend the best Group 31 trolling battery for boats, RVs, and more.

Group 31 Battery Overview

The Group 31 battery is a type of deep cycle or starting battery commonly used in marine, RV, and automotive applications. The "31" designation refers to the standard size of the battery, which is used across different battery technologies, including lead-acid and lithium. The Group 31 battery dimensions typically measure 13 inches (length) x 6.8 inches (width) x 9.4 inches (height).

Common Types of Group 31 Battery

The Group 31 battery comes in several different types. The most common are Flooded Lead-Acid, AGM (Absorbent Glass Mat), Gel, and Lithium-Ion (LiFePO4) batteries.

• Flooded Lead-Acid batteries: The traditional choice, requiring regular maintenance, but offering a lower upfront cost.
• AGM and Gel batteries: Maintenance-free, with AGM being more vibration-resistant and Gel offering better deep-cycle performance.
• Lithium-Ion (LiFePO4) batteries: Known for their lightweight design, long lifespan, and high discharge efficiency. Lithium Group 31 batteries provide superior performance and require no maintenance, making them ideal for demanding applications like trolling motors, RVs, and off-grid systems.

For deep cycle use, the Lithium-Ion (LiFePO4) battery is the best option due to its extended lifespan and ability to discharge deeper without damage. While the initial cost is higher, the benefits of lighter weight, longer-lasting power, and reduced maintenance make it a worthwhile investment in the long term.

Best Group 31 Battery from Redodo

Redodo is an emerging lithium battery brand providing high-quality and affordable LiFePO4 batteries. The Redodo’s Group 31 lithium batteries are the best-selling products in the market due to the extended lifespan (up to 10 years), high capacity, and ability to discharge deeper without damage.

Redodo 12V 100Ah Deep Cycle Lithium Battery

The Redodo 12V 100Ah LiFePO4 Battery is a top contender for those seeking a high-performance while affordable Group 31 battery for deep cycle applications. It is priced similarly to a 100Ah Group 31 AGM battery, yet it weighs just 1/3 of the AGM battery, weight at only 22.05 lbs.

This battery uses EV-grade LiFePO4 cells and offers up to 4000+ cycles at 100% DOD, making it ideal for long-term use in marine and RV setups. It also features an advanced BMS (Battery Management System) to ensure safety and efficiency, including protection against overcharging, short circuits, and temperature extremes.

Redodo 12V 100Ah Group 31 Trolling Motor Battery

If you're looking for the best Group 31 trolling battery for your kayak or bass boat, the Redodo 12V 100Ah TM battery is a solid choice. This battery is designed specifically for high-power applications like trolling motors, offering excellent discharge rates and long-lasting performance.

To withstand the harsh marine environment, the Group 31 trolling motor battery features an upgraded BMS that automatically cuts off charging when the temperature drops below 32°F (0℃) and resumes charging when above 41°F (5℃). It also includes pre-charge functions, automatic recovery after protection, and enhanced moisture and salt spray resistance for added durability.

Redodo 12V 100Ah Group 31 Bluetooth Lithium Battery

The Redodo Group 31 lithium battery with Bluetooth combines the power and reliability of the 100Ah LiFePO4 battery with the convenience of Bluetooth monitoring. This model is ideal for marine and RV applications, offering both lightweight design and extended battery life. Whether you're powering a trolling motor, an off-grid system, or a recreational vehicle, this battery will meet your energy needs without compromising on performance.

Redodo 12V 140Ah Group 31 LiFePO4 Battery with Bluetooth

This battery is one of the best Group 31 deep cycle batteries, offering an impressive 140Ah of capacity and 1920W high power output. The increased capacity makes it perfect for the person who need a longer running time power. This means you can enjoy peace of mind instead of worring about running out of power on the way!

The 140Ah lithium battery is equipped with a 150A BMS, which can support larger appliances like coffee makers and electric griddles with ease. Additionally, it comes with Bluetooth connectivity, allowing you to monitor the battery’s performance and status in real-time via the Redodo App and ensuring optimal performance.

Redodo 12V 140Ah Group 31 Dual Purpose Marine Battery

This Group 31 marine battery is designed to work as both a starting and deep cycle battery, making it ideal for marine applications. With a compact Group 31 size and weighing just 36.5 lbs, the 140Ah battery provides more usable energy than three AGM 12V 100Ah batteries combined (at 50% DOD).

Built to last for over 5,000 cranking cycles and 4,000 deep cycles at 100% DOD, this battery can handle the heavy demands of both starting and powering systems. It also features an IP67 waterproof rating, advanced Bluetooth, low-temperature charging protection, and an self-heating function, ensuring reliable high performance in all conditions.

FAQs on Group 31 Battery

How Much Does a Group 31 Battery Weigh?

A Group 31 battery weight typically ranges from 30 to 75 lbs, depending on the type and brand. Due to higher energy density, lithium versions are generally lighter than lead-acid batteries, with weights as low as 22.58 lbs for lithium models like the Redodo Group 31 Bluetooth Lithium Battery.

How Many Amp Hours in a Group 31 Battery?

A standard Group 31 battery typically ranges from 75Ah to 140Ah of capacity. The exact capacity will vary depending on the battery type (lead-acid or lithium) and brand. For example, the Redodo 140Ah Group 31 Deep Cycle Battery offers 140Ah, providing ample power for large RV applications, trolling motors, or off-grid systems.

How Long Will a Group 31 Deep Cycle Battery Last?

The lifespan of a Group 31 deep cycle battery can vary based on the battery type and usage conditions. Lead-acid batteries typically last between 3 to 5 years, while lithium batteries can last 10 years or more, with up to 4000+ cycles. Lithium batteries, like Redodo Group 31 batteries, offer a significantly longer lifespan, making them a more cost-effective and durable solution in the long run.

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