24V 52Ah
Deep Cycle Lithium Battery
Group 31


24V 52Ah
Deep Cycle Lithium Battery
Group 31

Perfect in many applications, including marine and electric vehicles, the RB24V52 is a lithium iron phosphate battery that maintains consistent power and is equipped with a built-in battery management system (BMS).



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Fast Charging

RELiON lithium batteries charge much faster than traditional lead-acid batteries, and they’re packed with more usable energy and up to 10 times longer life so you’re always ready to go!


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

Maintenance Free

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

Constant Power

Full power 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.

Long Life

RELiON lithium batteries provide up to 10 times longer life than lead-acid batteries, and they still provide 80% of the rated capacity after 3,500 cycles.

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.

Highly Efficient

RELiON lithium batteries have super low resistance, allowing you to charge much faster. And lithium batteries are 99% efficient, minimizing the losses during charge. Compare that to traditional lead-acid batteries at 75-80% efficiency, which results in significant loss when recharging.

Built-In Protection

Every RELiON lithium battery comes with a state-of-the-art battery management system (BMS) that provides protection from over-charge, over-discharge and short circuit conditions. Battery cells are enclosed in explosion-proof stainless steel casings. Built-in thermal fuses and other safety features offer added protection.

More Usable Capacity

Lead-acid batteries are typically sized up to two times your energy needs to account for extended periods without sun and less usable energy with higher rates of discharge. Plus, you are typically cautioned to limit your use to 50% of the rated capacity, as using more can significantly reduce performance. Lithium batteries provide 100% of their rated capacity, regardless of the rate of discharge. And, you can use it all and still get substantially longer cycle life.



Electrical Specifications

Nominal Voltage 25.6 V
Nominal Capacity 52 Ah
Capacity @ 25 A 120 min
Energy 1280 Wh
Resistance ≤60 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Batteries Connected in Series 1 (Single Use)

Mechanical Specifications

Dimensions (L x W x H) 13.0 x 6.8 x 8.4” (329 x 172 x 214 mm)
Weight 29.1 lbs (13.2 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 50 A
Peak Discharge Current 100 A (7.5 s ±2.5 s)
Discharge Over-Current Protection 215 A ±15 A (10 ±5 ms)
Recommended Low Voltage Disconnect 22.0 V
Discharge Under-Voltage Protection 16.0 V (2.0 ±0.08 vpc) (20 ±6 ms)
Reconnect Voltage 20.0 V (2.5 ±0.05 vpc)
Short Circuit Protection Response Time 200-600 µs

Charge Specifications

Recommended Charge Current 2.5 A - 25 A
Maximum Continuous Charge Current 50 A
Maximum Charge Current 14 to 32*F (-10 to 0*C) ≤0.1 C (5 A)
Maximum Charge Current -4 to 14*F (-20 to -10*C) ≤0.05 C (2.5 A)
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 30.4 V (3.8 ±0.05 vpc)
Balancing Voltage 28.8 V (3.6 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 0°C (32°F)

Compliance Specifications

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


Discharge Voltage Chart 24 V graph
Discharge Voltage At Various Rates 24 V graph
Charge Voltage Soc Chart 24 V graph
Charge Voltage Char Chart 24 V graph
Life Vs Lead Acid Chart graph
Cycle Life Vs Depth Discharge Chart graph


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