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Relion RB100 12V 100 Ah Lithium Ion Deep Cycle Battery

Relion RB100 12V 100 Ah Lithium Ion Deep Cycle Battery

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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: 8.8 in (223 mm)
    • Weight: 26.4 lbs (11.98 kg)
    • AWP
    • Backup Power
    • Electric Vehicles
    • Floor Machines
    • Marine
    • Recreational Vehicles




Nominal Voltage 25.6 V
Nominal Capacity 100 Ah
Capacity @ 25A 240 min
Energy 2560 Wh
Resistance ≤30 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Modules in Series 1 (Single Use)


Dimensions (L x W x H) 20.5 x 10.5 x 9.0” 520 x 267 x 228 mm
Weight 61.1 lbs (27.7 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


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 22 V
BMS Discharge Voltage Cut-Off 16 V (2.0 ±0.08 vpc) (20 ±6 ms)
Reconnect Voltage 20 V (2.5 ±0.05 vpc)
Short Circuit Protection 200-600 µs


Recommended Charge Current 5 A - 50 A
Maximum Charge Current 100 A
Charge Current 32ºF to 14ºF (0 to -10 ºC) ≤0.1 C
Charge Current -4ºF to 14ºF (-20 to -10 ºC) ≤0.05 C
Recommended Charge Voltage 28.4 V - 29.2 V
BMS Charge Voltage Cut-Off 31.2 V (3.9 ±0.025 vpc)
(1.1 ±0.4 s)
Reconnect Voltage 28.8 V (3.8 ±0.05 vpc)
Balancing Voltage 28.8 V (3.6 vpc)


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 0°C (32°F)


Certifications CE (battery)
UL1642 & IEC62133 (cells)
Shipping Classification UN 3480, CLASS 9



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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.