Wee Boats for Your BIG Adventures


50Ah 12V Lithium Battery Group 24 RB50-HP

$638.96 $709.95

Item #RB50-HP

Found a Better Price?  Use the wee Price Match form!


The RELiON 12V 50Ah dual purpose lithium battery is the perfect replacement for a group 24 sized battery. Weighing in at only 18.7 lbs it’s a lightweight alternative to lead-acid and one of the most popular lithium batteries. The HP Series batteries are high performing dual purpose deep cycle batteries that can handle both starting and cycling. The RB50-HP has increased peak amps over the standard batteries. This increase in peak amps can be used to start motors, electric start generators and other high amp draw devices. After starting, the battery can double as a house battery providing power for peripherals, accessories and other onboard needs.

The RB50-HP surpasses expectation 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 iron phosphate (LiFePO4) batteries provide more energy for high consumption than traditional lead-acid batteries. They also offer fast charging and discharging, high efficiency and a 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.



  • 50 Ah
  • 640 Wh
  • 12.8 V
  • Group 24 size
  • LiFePO4 battery chemistry
  • Built-in battery management system (BMS)

Wee Expert Tip - Use a Victron SmartShunt battery monitor to conveniently read out battery parameters, like state of charge, time to go, historical information and much more via a Bluetooth connection to the VictronConnect App on your phone (or tablet).



Can I use my existing lead-acid battery charger (Wet, AGM or Gel) to charge RELiON lithium iron phosphate batteries?
  • Most likely, yes. RELiON lithium batteries are very charger-friendly. Most chargers today have a lithium charge profile, which is what RELiON recommends using. AGM or gel charge profile chargers will work with RELiON batteries. RELiON does not recommend the use of a flooded charge profile with their 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 RELiON's Lithium Charging Instructions for more details.





       Download Data Sheet



      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)


      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


      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


      Recommended Charge Current 2.5 A - 25 A
      Maximum Charge Current 50 A
      Recommended Charge Voltage 14.2V - 14.6V
      Charge Current (0 to -10 ºC) ≤0.1 C
      Charge Current (-20 to -10 ºC) ≤0.05 C
      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)


      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 185 ºF ±5 ºF (85 ºC ±5 ºC)
      Reconnect Temperature 140 ºF ±59 ºF (60 ºC ±15 ºC)


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


        Best Use Replacement for a Group 24 sized dual-purpose battery
        Battery Weight 18.7 lbs
        Warranty 60 month manufacturer's warranty period (first 36 months are free replacement or repair coverage then next 24 months are pro-rated credit coverage)





        Have a Question?

        Be the first to ask a question about this.

        Ask a Question