PRICE: $1,050.00

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Longer runtime = more recreation time with the RB100. This 12V 100Ah deep cycle lithium battery is the perfect replacement from a group 31 AGM, GEL or lead-acid Battery. Weighing in at only 30 lbs it’s a lightweight alternative to lead-acid and one of our most popular lithium batteries.

The RB100 surpasses expectations by being versatile, compact and more powerful than its lead-acid counterparts. It’s the perfect combination of size and capacity to fit many applications including, RV, marine, solar energy systems and more.

RELiON lithium batteries provide more energy for high consumption than traditional lead-acid batteries. They also offer ultra-fast charging and discharging, high efficiency and longer cycle life – plus no maintenance!

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.

  • Voltage: 12.8V
  • Amp Hours: 100Ah
  • Length: 13 in (329 mm)
  • Width: 6.8 in (172 mm)
  • Height: 8.4 in (214 mm)
  • Weight: 26.4 lbs (11.98 kg)
  • AWP
  • Backup Power
  • Electric Vehicles
  • Floor Machines
  • Marine
  • Recreational Vehicles
  • Solar


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?



Electrical Specifications

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

Mechanical Specifications

Dimensions (L x W x H) 13.0 x 6.8 x 8.8” (329 x 172 x 223 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
Enclosure Protection IP66
Cell Type - Chemistry Cylindrical - LiFePO4

Discharge Specifications

Maximum Continuous Discharge Current 100 A
Peak Discharge Current 200 A (7.5 s ±2.5 s)
BMS Discharge Current Cut-Off 280 A ±50 A (9 ±4 ms)
Recommended Low Voltage Disconnect 11 V
BMS Discharge Voltage Cut-Off 8 V (2.0 ±0.08 vpc) (140 ±60 ms)
Reconnect Voltage 9.2 V (2.3 ±0.1 vpc)
Short Circuit Protection 200-600 µs

Charge Specifications

Recommended Charge Current 5 A - 50 A
Maximum Charge Current 100 A
Charge Current 32°F to 14°F (0 to -10°C) ≤0.1 C
Charge Current 14°F to -4°F (-10 to -20°C) ≤0.05 C
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)
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 (battery)
UN38.3 (battery)
UL1642 (cells) (File# MH64523)
IEC62133 (cells)
Shipping Classification UN 3480, CLASS 9



How to Read RELiON's Data Sheets

We know that Data Sheets can sometimes be confusing, overwhelming, or difficult to decipher. In this Tech Video, one of our experts breaks down how to easily read our Data Sheets.

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Customer Testimonial

"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.

Why Choose RELiON Lithium Batteries?

Longer Life

A much longer life span compared to lead-acid batteries – up to 10x longer!

More Hours of Power

A 25-50% high capacity than lead-acid batteries, with full power available throughout discharge.

Low Self-Discharge Rate

Which means a long shelf life, up to a year, between charges.

Highly Efficient

Fast recharge times and a 99% efficient recharge process, which means less wasted electricity.

Lighter Weight

Typically half the weight than lead-acid batteries.

Partial State of Charge Tolerant (PSOC)

If operated in PSOC there is no damage to the battery. This is the leading cause of early failure of lead acid batteries.

Lower Overall Total Cost of Ownership

Changing batteries less often means fewer replacement and labor costs.

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 lithium 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 of 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.

Bassmaster Elite Series Pro Patrick Walters Explains Why He Uses Lithium Batteries


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