12V 100Ah
Deep Cycle Lithium Battery
Group 31


12V 100Ah
Deep Cycle Lithium Battery
Group 31

Estimated 1 - 2 weeks shipping.

The RB100 surpasses expectations by being versatile, lightweight, and more powerful than its lead-acid counterparts. This lithium iron phosphate no-maintenance battery is the perfect combination of size and capacity to fit many recreational and commercial applications.


United States Of America White 230216 103954


Warranty White 230216 103954


Free Delivery White 230216 103955



Not all lithium batteries are created equal. All RELiON Batteries use the safest and most stable components, including a LiFePO4 cathode and a built-in Battery Management System (BMS). The BMS ensures a long lifetime, safe handling – and high-accuracy State of Charge (SOC) calculations.

Temperature Tolerant

Lithium batteries can handle a wide variety of conditions and are even 2.5x more efficient at low temperatures than lead-acid while being able to safely operate up to 149°F (65°C).


RELiON lithium batteries provide more power than lead-acid batteries and are typically half the weight. Boosting both performance and agility on the water.

Constant Power

Full power is available throughout discharge. Voltage does not drop like lead-acid.

Eco-Friendly & Safe

RELiON lithium batteries are the ultimate clean energy. No gassing, no fumes, and no pollution. Enjoy reliable power, while protecting the environment, using these non-hazardous batteries.

Maintenance Free

Plug, play, and charge. No watering, no corrosion.

Partial State of Charge Tolerant

Partial state of charge, known as PSOC, which is a killer of lead-acid batteries, does not affect performance or battery life of a lithium battery. Sometimes batteries don’t get fully charged, or they regularly operate in a partial state of charge. Either way, you can count on RELiON lithium batteries living a long and productive life.



Electrical Specifications

Nominal Voltage 12.8 V
Nominal Capacity 100 Ah
Capacity @ 25 A 240 min
Energy 1280 Wh
Resistance ≤ 30 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Batteries Connected in Series 6

Mechanical Specifications

Dimensions (L x W x H) 13.0 x 6.8 x 8.4” (329 x 172 x 214 mm)
Weight 26.4 lbs (11.98 kg)
Terminal Type M8 x 1.25
Terminal Torque 80 - 100 in-lbs (9 - 11 N-m)
Case Material ABS & PC blend (UL94-V0 flame rating)
Enclosure Protection (Waterproof Rating) IP67
Cell Type - Chemistry Cylindrical - LiFePO4

Discharge Specifications

Maximum Continuous Discharge Current 100 A
Peak Discharge Current 200 A (7.5 s ±2.5 s)
Discharge Over-Current Protection 280 A ±50 A (9 ±4 ms)
Recommended Low Voltage Disconnect 11.0 V
Discharge Under-Voltage Protection 8.0 V (2.0 ±0.08 vpc) (140 ±60 ms)
Reconnect Voltage 9.2 V (2.3 ±0.1 vpc)
Short Circuit Protection Response Time 200-600 µs

Charge Specifications

Recommended Charge Current 5 A - 50 A
Maximum Continuous Charge Current 100 A
Maximum Charge Current 14 to 32*F (-10 to 0*C) ≤0.1 C (10 A)
Maximum Charge Current -4 to 14*F (-20 to -10*C) ≤0.05 C (5 A)
Recommended Charge Voltage 14.2 V - 14.6 V
BMS Charge Voltage Cut-Off 15.6 V (3.9 ±0.025 vpc) (1.1 ±0.4 s)
Reconnect Voltage 15.2 V (3.8 ±0.05 vpc)
Balancing Voltage 14.4 V (3.6 ±0.025 vpc)

Temperature Specifications

Discharge Temperature -4 to 140 ºF (-20 to 60 ºC)
Charge Temperature* -4 to 113 ºF (-20 to 45 ºC)
Recommended Storage Temperature 23 to 95 ºF (-5 to 35 ºC)
BMS High Temperature Cut-Off 176 ºF (80 ºC)
Reconnect Temperature 122 ºF (50 ºC)
*Refer to charge currents below 32°F (0°C)

Compliance Specifications

Certifications CE and UKCA (battery)
UN38.3 (battery)
UL1642 (cells) (File# MH64523)
IEC62133 (cells)
Shipping Classification UN 3480, CLASS 9


Charge Voltage Char Chart 12 V graph
Charge Voltage Soc Chart 12 V graph
Discharge Voltage At Various Rates 12 V graph
Discharge Voltage Chart 12 V graph
Cycle Life Vs Depth Discharge Chart graph
Life Vs Lead Acid Chart graph


Miguel P.

Fantastic battery and peace of mind. Just finished 3 week trip and never worried about battery. Super fast recharge while driving & solar. Minimal drain during day use. Should have switched to Relion years ago. Thank you

Brian W.

The 36 volt set up with the RB-100 keeps my trolling motor running at peak performance from daylight till dark without any loss in power. The RB100-HP as my main cranking battery that powers all of the electronics (3 including power hungry live scope) live wells, talon shallow water anchors, lights, trim ect. has performed beyond expectation. At the end of a tournament day with everything running I still have 13.2 volts. The recovery time for charging is lighting fast and the huge weight difference switching from heavy AGM's has increase the fuel economy with my outboard and overall performance of my boat. Glad I made the switch to Relion!

Garrett S.

We just installed our 2 lithium 100ah batteries. It was simple to install and worked right out of the box. We also bought a Victron BMV-712 and it had no issues recognizing and reading your batteries.

Tom K.

Working great so far! After a lot of research, really happy with our choice!

Jim T.

I never send in reviews but I have to in regards to this purchase. These batteries have exceeded my expectations. I'm a bass fisherman and need a power supply I can depend so all I have to think about is fishing. These batteries maintain a high output which means my 3 sonar units never go down. 360 transducer never gets distorted which it did with lead acid as the power drained down below the threshold. My trolling motor acts like it picked up 5 lbs of thrust. It is strong all day. I can run my live wells, aerator, oxygenator etc without a concern ill have enough power. My only regret is I should have switched over sooner! Thank you!

Kevin D.

How does your battery compare to the Canbat lithium battery?

Robert S.

Like the weight reduction, have not used them much so reserving commit for a later date. Shipping was fast Freight company contacted me for delivery time frame. Customer service was first class and quick.

Larry Fadaol

I looked at many different lithium batteries, deciding on Relion. Purchased three of these for my trolling motor and very impressed with their performance. The weight of these batteries are amazing, making it so easy to install. The number one reason for going with this brand was the help and excellent customer service from Brad. He offers good advice on type battery needed and always willing to follow up when there is a question.

Matt Joachim

After researching different brands for a couple of years, I took a chance on the ReLion RB-100 for my 24v and 36v bass boats. Since I can’t take both boats out at the same time I am using three batteries for both boats. The bass tournaments I fish usually drain any lead acid battery in the 10 hr day. I bought the ReLion battery monitor to keep track of charge/discharge and after fishing a couple tournaments now I can say that I am impressed. Battery monitor has not got below 35% no matter how hard I run the Trolling Motor. We fish only river tournaments in the MO ozarks. The trolling motor is almost always running at 50-70% 80lb or 112lb. The only problem with these is that they WILL NOT start your motor. You will need the RB100-HP which has 800a peak discharge instead of the RB100 200a discharge. Happy spending.



Lithium batteries are rated for peak current (20°C/68°F for 5-10 seconds) instead of cold cranking amps (0°C/32°F for 30 seconds). The RB100 is rated at 200A for 5-10 seconds.

Paul Inconiglios

How come there is no CCA specs?

Frequently Asked Questions

Can I use my existing lead-acid battery charger (Wet, AGM or Gel) to charge RELiON lithium iron phosphate batteries?
Most likely, yes. Our lithium batteries are very charger-friendly. Most chargers today have a lithium charge profile, which is what we recommend using. AGM or gel charge profile chargers will work with our batteries. We do not recommend the use of a flooded charge profile with our batteries. These chargers may reach the overvoltage protection limit and disconnect. It won’t damage the battery but will likely result in charger faults. See our Lithium Charging Instructions for more details.
There are a few RB100 battery options, which one is right for me?
Some key differences to consider RB100 battery: our standard group 31 lithium iron phosphate battery RB100-D battery: a DIN size battery, commonly used in Europe. RB100-HP battery: a dual-purpose battery, which provides a higher peak current than our standard RB100. RB100-LT battery is designed specifically for cold-weather charging.
How long will it take to charge a LiFePO4 battery?
Lithium iron phosphate batteries can be charged in as fast as 1 hour. We recommend using a rate that charges our batteries in 2-5 hours. Please refer to the data sheet for your particular model, to find the recommended charge rates. All of our data sheets are available on our website within the product section.
Can the RB100 be wired in series or parallel?
Yes, the RB100 can be wired either in series or parallel. The difference between parallel and series connections: Parallel connections involve connecting 2 or more batteries together to increase the capacity of the battery bank. In this case, the positive terminals are connected together and the negative terminals are connected together with all the batteries until you reach your desired capacity. Series connections involve connecting 2 or more batteries together to increase the voltage of the battery system. The positive of one battery is connected to the negative of another until the desired voltage is achieved. For example, if you connect 2 x 12V batteries in series, the battery system will be 24V.

The RB100 Is Great For Powering

Anchor V2 230216 114031


Recreational 230216 114025

Recreational Vehicles

Charge V2 230216 114024

Backup Power

Commercial 230216 114024

Floor Machines

Why Bassmaster Pro Matt Peters Chooses RELiON Lithium Batteries

Why Bassmaster Pro Matt Peters Chooses RELiON Lithium Batteries

What Our Customers Are Saying

"In a truck camper, weight matters a great deal. My lithium batteries are half the weight of the lead-acid batteries with twice the power since I can use them down to around 10% or more of their capacity as opposed to 50% capacity on the lead-acid batteries. If I were to recommend RELiON batteries to a close friend, I would say that they're a good, safe bet that are far superior to any lead-acid/AGM batteries."

-Anne Marie L.

We're Invested In Our Lithium Iron Phosphate Batteries

Lithium Certifications Recycling 1000X300