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The RB50-HP is a 12V 50Ah lithium marine battery in RELiON’s High Performance series. This lithium iron phosphate battery is specially designed to handle both starting and cycling. It delivers powerful cranking amperage for easy starting, and low amp draw service for reliable auxiliary power. RELiON’s HP Series dual purpose batteries are a perfect compromise between the unique demands of starting service and deep cycling, low amp draw service.

The RB50-HP offers abundant power in a small footprint. It’s versatile and compact enough to be used in many marine applications including smaller boats with lower battery requirements, boats that require two of the same batteries and boats with electrical systems designed for just one battery.

The RB50-HP features installation flexibility and no maintenance over the life of the battery. It maintains consistent power and is equipped with an M8 terminal type and a built-in battery management system (BMS).

  • Voltage: 12.8V
  • Amp Hours: 50Ah
  • Length: 10.2 in (260 mm)
  • Width: 6.6 in (168 mm)
  • Height: 8.6 in (218 mm)
  • Weight: 18.7 lbs (8.5 kg)
  • Marine

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Electrical Specifications

Nominal Voltage 12.8V
Nominal Capacity 50Ah
Capacity @ 25A 120 min
Energy 640 Wh
Resistance ≤20 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Modules in Series 1 (Single Use)

Mechanical Specifications

Dimensions (L x W x H) 10.2 x 6.6 x 8.6” 260 x 168 x 218 mm
Weight 18.7 lbs (8.5 kg)
Terminal Type M8
Terminal Torque 80 - 100 in-lbs (9 - 11 N-m)
Case Material ABS
Enclosure Protection IP56
Cell Type - Chemistry Cylindrical - LiFePO4

Discharge Specifications

Maximum Continuous Discharge Current 50 A
Peak Discharge Current 400 A (≤3 s)
BMS Discharge Current Cut-Off 550 A ±60 A (42 ±22 ms)
Recommended Low Voltage Disconnect 11V
BMS Discharge Voltage Cut-Off 8V (2.0 ±0.08 vpc) (100 ±50 ms)
Reconnect Voltage 10V (2.5 ±0.1 vpc
Short Circuit Protection 200-800 μs

Charge Specifications

Recommended Charge Current 25 A
Maximum Charge Current 50 A
Recommended Charge Voltage 14.2V - 14.6V
BMS Charge Voltage Cut-Off 15.2V (3.8 ±0.05 vpc) (1.0 ±0.5 s)
Reconnect Voltage 14.4V (3.6 ±0.05 vpc)
Balancing Voltage 14.4V (3.6 ±0.025 vpc)

Temperature Specifications

Discharge Temperature -4 to 140 ºF (-20 to 60 ºC)
Charge Temperature 32 to 113 ºF (0 to 45 ºC)
Storage Temperature 23 to 95 ºF (-5 to 35 ºC)
BMS High Temperature Cut-Off 185 ºF ±5 ºF (85 ºC ±5 ºC)
Reconnect Temperature 140 ºF ±59 ºF (60 ºC ±15 ºC)

Compliance Specifications

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

Performance Characteristics



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