Frequently Asked Questions About Trolling Motor Batteries | RELiON

Posted July 24, 2020

Battery selection is essential, especially when it comes to your boat. When deciding on your next trolling motor battery, it could mean the difference between the battery failing and having a great fishing trip with no interruptions. Your bass boat needs reliable marine batteries, as they are necessary for both starting and running. Not all batteries serve the same purpose, however - some are intended specifically for producing cranking power for engine startups and others are used exclusively for running your trolling motor.

Curious about trolling motor batteries and want to learn more? We’ve put together the most frequently asked questions around lithium batteries for trolling motors.

How many lithium trolling motor batteries do I need?

The number of lithium batteries you need depends on your trolling motor voltage. RELiON offers 12-Volt and 24-Volt lithium batteries. If you have a 12-Volt trolling motor, then you can choose from several 12-Volt options. If you have a 24-Volt motor, you can use 2 12-Volt batteries in series or a single 24-Volt battery and if you have a 36-Volt motor you can use 3 12-Volt batteries in series.

Which Lithium12-Volt battery should I use for my trolling motor?

RELiON offers several 12-Volt battery options to choose from. The most common models are; RB52, RB75, RB80 and RB100, which are 50Ah, 75Ah, 80Ah and 100Ah, respectively. To get the same runtime as a wet or AGM lead-acid battery, use a lithium battery that is 60% the capacity of that lead-acid battery. If you want more time on the water, size up from there.

Example: 60Ah RELiON lithium battery = 100Ah lead-acid battery

Are RELiON lithium batteries a drop-in replacement to my lead-acid battery?

RELiON offers the standard size batteries; Group 24, Group 27 and Group 31.

Do I need to use a lithium starter battery if my trolling motor batteries are lithium?

No, you can use a lead-acid starter battery with your lithium trolling motor batteries.


Does RELiON offer a lithium starter battery?

RELiON has a RB100-HP, which is a Group 31 dual-purpose battery that can be used for starting.

What type of charger should I use for my deep cycle lithium batteries?

We recommend you use a multi-bank charger so that each 12-Volt battery can be charged separately to ensure they stay balanced and get fully charged. Ideally, use a charger with a lithium charge profile, however, most AGM charge profiles will work just fine.

Do I need to charge my batteries each time I use them?

Unlike lead-acid batteries, lithium batteries do not get damaged if they sit partially discharged for extended periods of time. However, we do recommend you charge them after each use to ensure you have the maximum runtime available, every time you use your boat.

To learn more about how to calculate your energy needs and find the optimal battery for your application and usage, visit ourLithium Battery Selector Tool.

Have other questions about RELiON's trolling motor batteries? Check out more of our common FAQs here or contact us.

About the Author:

Christine Feodorov

Christine Feodorov is the VP of Product Management & Strategy at RELiON Battery. With over 23 years of experience with deep-cycle batteries, including flooded lead-acid and AGM, as well as lithium, Christine is an engineer with experience in battery testing, product development and management, and technical support. Keep up with Christine on LinkedIn here.