12V 12Ah
Deep Cycle Lithium Battery


12V 12Ah
Deep Cycle Lithium Battery

The RB12 lithium iron phosphate battery packs a punch, giving you the perfect amount of power for a full day of fishing and outdoor recreational activities. This 12V battery is commonly used for fish finders, boating electronics, scooters, robotics and other deep cycle applications.



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Easy To Transport

Compared to other battery chemistries, RELiON LiFePO4 batteries provide the same or greater energy at less than half the weight and size. This means more flexibility and ease of use!

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.

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!

Partial State of Charge Tolerant

Partial charging does not affect performance quality or battery life. A low self-discharge rate means worry-free storage so even occasional users can be assured of reliable performance.

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.

Constant Power

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

Maintenance Free

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



Electrical Specifications

Nominal Voltage 12.8 V
Nominal Capacity 12 Ah
Energy 128 Wh
Resistance ≤90 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Batteries Connected in Series 1

Mechanical Specifications

Dimensions (L x W x H) 5.9 x 3.9 x 4.0” (151 x 98 x 101 mm)
Weight 3.6 lbs (1.65 kg)
Terminal Type F2
Case Material ABS
Enclosure Protection IP66
Cell Type Cylindrical
Chemistry LiFePO4

Discharge Specifications

Maximum Continuous Discharge Current 10 A
Peak Discharge Current 20 A (7.5 s ±2.5 s)
Discharge Over-Current Protection 30 A (±5 A) (10 ±5 ms)
Recommended Low Voltage Disconnect 11.0 V
Discharge Under-Voltage Protection 8.0 V (2.0 ±0.08 vpc) (100 ±50 ms)
Reconnect Voltage 10.0 V (2.5 ±0.1 vpc)
Short Circuit Protection Response Time 200-500 µs

Charge Specifications

Recommended Charge Current 0.5 A - 5 A
Maximum Continuous Charge Current 10 A
Charge Current 32°F to 14°F (0 to -10°C) ≤0.1 C (1 A)
Charge Current 14°F to -4°F (-10 to -20°C) ≤0.05 C (0.5 A)
Recommended Charge Voltage 14.2 V - 14.6 V
BMS Charge Voltage Cut-Off 15.6 V (3.9 ±0.025 vpc)
(1.0 ±0.5 s)
Reconnect Voltage 15.2 V (3.8 ±0.05 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)
*Refer to charge currents below 32°F (0°C)

Compliance Specifications

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

Performance Characteristics

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
Life Vs Lead Acid Chart graph
Cycle Life Vs Depth Discharge Chart graph


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The RB12 Is Great For Powering

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Renewable Energy

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Backup Power

The RB12 Is Great For Powering

Understanding Battery Terms

Understanding the basics of battery ratings and terminology is important when comparing and selecting the right type and number of batteries for your application to ensure you have enough energy to meet your energy goals.

Learn More About Battery Terms

We're Invested In Our Lithium Iron Phosphate Batteries

Lithium Certifications Recycling 1000X300