Battery-Cables-&-Accessories > Batteries > RELiON-Lithium-Batteries

RELiON® Legacy Series - 12V

RELiON RB100 Legacy Battery

RELiON RB100 Legacy Battery null null

RELiON Legacy Series Lithium Batteries: Drop-In Replacement for AGM, GEL, and Lead-Acid Batteries

The RELiON Legacy Series is the perfect drop-in upgrade for Group 24, 27, 31, and 8D AGM, GEL, or lead-acid batteries, offering the enhanced benefits of lithium iron phosphate (LiFePO4) chemistry. These batteries are safe, stable, generate minimal heat, and provide ultra-fast charging, high efficiency, longer life cycles, and zero maintenance—making them a superior investment over traditional lead-acid batteries.

Designed for a wide range of applications, including RVs, marine, electrical backup, and solar systems, the Legacy Series offers flexibility and compatibility. Parallel connections can be made with up to 12 units, making it suitable for larger systems. These batteries feature a nominal voltage of 12.8V and are rated for use in temperatures ranging from -4°F to 140°F. With a 10-year warranty, including a 3-year free replacement or repair period, RELiON Legacy Series batteries provide long-term reliability and performance.

Learn more at our blog post - RELiON Legacy Series – Deep Cycle Lithium Batteries. Looking to upgrade your RV? Check out this video on the best options for your RV.

The RB300 is currently unavailable. We apologize for the inconvenience.


  • Rated up to 12V. Nominal Voltage: 12.8V
  • See spec sheets for series capability. Parallel connections can be made up to 12 units.
  • 10-year Warranty – 3 year Free Replacement or Repair Period
  • Rated for UN38.3, UKCA & CE (battery),UL1642 (cells), (File# MH64523), IEC62133 (cells), Shipping Classification UN 3480, CLASS 9
  • Recommended Charge Voltage: 14.2 V - 14.6 V (Marine, RV, Solar and other 12V applications)
  • 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)
  • Recommended charger is 944012
  • *All RELiON Hazmat items are not eligible for return to Del City. Please review our return policy.
  • *Can not be shipped outside the US contiguous states
  • *Potential 1-2 week shipping delay for all hazmat items

Item Description Price Qty in
Package 		Add to Cart
RB5 RELiON RB5, LIFEPO4 Legacy Lithium Battery 12V, F2 Flag Terminal, Not Series Capable, 12.8V, 5 Amp Hour, HAZMAT drawing 69.95 1 EA
RB12 RELiON RB12, LIFEPO4 Legacy Lithium Battery 12V, F2 Flag Terminal, Not Series Capable, 12.8V, 12 Amp Hour, HAZMAT drawing 109.95 1 EA
RB20 RELiON RB20, LIFEPO4 Legacy Lithium Battery 3SC 12V, Series Capable to 36V, 12.8V, 20 Amp Hour, HAZMAT drawing 189.95 1 EA
RB20-X RELiON RB20-X, High Continuous and High Peak LIFEPO4 Legacy Lithium Battery 3SC 12V, Series Capable up to 36V, 12.8V, 20 Amp Hour, HAZMAT drawing 199.95 1 EA
RB35 RELiON RB35, LIFEPO4 Legacy Lithium Battery U1 3SC 12V, Series Capable up to 36V, 12.8V, 35 Amp Hour, HAZMAT drawing 329.95 1 EA
RB35-X RELiON RB35-X, High Continuous and High Peak LIFEPO4 Legacy Lithium Battery U1 12V, Not Series Capable, 12.8V, 35 Amp Hour, HAZMAT drawing 359.95 1 EA
RB52 RELiON RB52, LIFEPO4 Legacy Lithium Battery 4SC 26G 12V, Series Capable up to 48V, 12.8V, 52 Amp Hour, HAZMAT drawing 469.95 1 EA
RB60 RELiON RB60, LIFEPO4 Legacy Lithium Battery 24 4SC 12V, Series Capable up to 48V, 12.8V, 60 Amp Hour, HAZMAT drawing 569.95 1 EA
RB75 RELiON RB75, LIFEPO4 Legacy Lithium Battery 24 4SC 12V, Series Capable up to 48V, 12.8V, 75 Amp Hour, HAZMAT drawing 699.95 1 EA
RB80 RELiON RB80, LIFEPO4 Legacy Lithium Battery 27 4SC 12V, Series Capable up to 48V, 12.8V, 80 Amp Hour, HAZMAT drawing 749.95 1 EA
RB100 RELiON RB100, LIFEPO4 Legacy Lithium Battery 31 4SC 12V, Series Capable up to 48V, 12.8V, 100 Amp Hour, HAZMAT drawing 899.95 1 EA
RB170 RELiON RB170, LIFEPO4 Legacy Lithium Battery 4SC 12V, Series Capable up to 48V, 12.8V, 170 Amp Hour, HAZMAT drawing 1,529.95 1 EA
RB200 RELiON RB200, LIFEPO4 Legacy Lithium Battery 8D 6SC 12V, Series Capable up to 48V, 12.8V, 200 Amp Hour, HAZMAT drawing 1,749.95 1 EA
RB300 RELiON RB300, LIFEPO4 Legacy Lithium Battery 8D 4SC 12V, Series Capable up to 48V, 12.8V, 300 Amp Hour, HAZMAT drawing 2,499.95 1 EA

RELiON® Legacy Series - 24V

RELiON® Legacy Series - 24V

RELiON® Legacy Series - 24V null null null

The RELiON Legacy Series is the ideal drop-in upgrade for many battery sizes. Those sizes include: any Group U1, 24, 31 and 8D AGM, GEL or lead-acid batteries. These batteries are manufactured with LiFePO4 (Lithium Iron Phosphate) cell chemistry. They are safe, stable and generate very little heat. Lithium Batteries have Ultra-fast charging, high efficiency, longer life cycle and no maintenance. These features provide a higher return on your investment than traditional Lead-acid batteries. The Legacy Series is very flexible and is used in many applications like RV, Marine, Electrical Back Up and Solar. Learn more at our blog post - RELiON Legacy Series – Deep Cycle Lithium Batteries. Looking to upgrade your RV? Check out this video on the best options for your RV.


  • Rated up to 24V. Nominal Voltage: 25.6V
  • Parallel connections made up to 12 units
  • Recommended charger is 963170
  • 10-year Warranty – 3 year Free Replacement or Repair Period
  • Rated for UN38.3 & CE (battery), UL1642 (cells), (File# MH64523), IEC62133 (cells), IEC62133-2 (battery), Shipping Classification UN 3480, CLASS 9
  • Recommended Charge Voltage: 28.4 V - 29.2 V (Marine, Electrical and Solar applications)
  • 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)
  • *Can not be shipped outside the US contiguous states
  • *All RELiON Hazmat items are not eligible for return to Del City. Please review our return policy.
  • *Potential 1-2 week shipping delay for all hazmat items

Item Description Price Qty in
Package 		Add to Cart
RB24V20 RELiON RB24V20, LIFEPO4 Legacy Lithium Battery U1 24V, Not Series Capable, 25.6V, 20 Amp Hour, HAZMAT drawing 379.95 1 EA
RB24V40 RELiON RB24V40, LIFEPO4 Legacy Lithium Battery 24 24V, Not Series Capable, 25.6V, 40 Amp Hour, HAZMAT drawing 749.95 1 EA
RB24V52 RELiON RB24V52, LIFEPO4 Legacy Lithium Battery 31 24V, Not Series Capable, 25.6V, 52 Amp Hour, HAZMAT drawing 929.95 1 EA
RB24V100 RELiON RB24V100, LIFEPO4 Legacy Lithium Battery 8D 24V, Not Series Capable, 25.6V, 100 Amp Hour, HAZMAT drawing 1,749.95 1 EA
RB24V200 RELiON RB24V200, LIFEPO4 Legacy Lithium Battery 24V, Not Series Capable, 25.6V, 200 Amp Hour, HAZMAT drawing 3,495.95 1 EA

RELiON® Legacy Series - 36V

RELiON® Legacy Series

RELiON® Legacy Series null

The RELiON® Legacy Series is the ideal drop-in upgrade for many battery sizes. The RB36V40 battery was designed specifically for marine (IP67 waterproof rating) use replacing the need for three 12V batteries wired in series to obtain the needed voltage for a 36V trolling motor. End users can run less batteries while still adding to their run time with the increase in capacity thanks to a simplified setup and smaller Group 31 case size footprint. These batteries are manufactured with LiFePO4 (Lithium Iron Phosphate) cell chemistry. They are safe, stable and generate very little heat. Lithium Batteries have Ultra-fast charging, high efficiency, longer life cycle and no maintenance. The Legacy Series is very flexible and is used in many applications like RV, Marine, Electrical Back Up, Floor Machines and Solar. Learn more at our blog post - RELiON Legacy Series – Deep Cycle Lithium Batteries. Learn more about how you can fish all day with long lasting 36V batteries in this video about the New RB36V40.


  • Rated up to 36V. Nominal Voltage: 38.4V
  • 3 @ 36V 40Ah (120 total Ah) in Parallel vs 3 @ 12V100Ah in Series = 20% More Capacity
  • Recommended Charge Voltage: 42.6V-43.8V (Marine, RV, Electrical and Solar applications)
  • Discharge Temperature: -4 to 140 ºF (-20 to 60 ºC)
  • Charge Temperature: -4 to 113 ºF (-20 to 45 ºC)
  • 10-year Warranty – 3 Year Free Replacement or Repair Period
  • Rated for UN38.3 & CE & UKCA (battery), UL1642 (cells), IEC62133 (cells), Shipping Classification UN 3480, CLASS 9
  • Data Sheet: RB36V40
  • *Can not be shipped outside the US contiguous states
  • *All RELiON Hazmat items are not eligible for return to Del City. Please review our return policy.
  • *Potential 1-2 week shipping delay for all hazmat items
Item Description Price Qty in
Package 		Add to Cart
RB36V40 RELiON RB36V40, LIFEPO4 Legacy Lithium Battery 36V, Not Series Capable, 38.4V, 40 Amp Hour, HAZMAT drawing 1,089.95 1 EA

RELiON® Legacy Series - 48V

RELiON® Legacy Series

RELiON® Legacy Series null null

The RELiON Legacy Series is the ideal drop-in upgrade for many battery sizes. These batteries are manufactured with LiFePO4 (Lithium Iron Phosphate) cell chemistry. They are safe, stable and generate very little heat. Lithium Batteries have Ultra-fast charging, high efficiency, longer life cycle and no maintenance. These features provide a higher return on your investment than traditional Lead-acid batteries. These 48V batteries can be used in Solar applications. Learn more at our blog post - RELiON Legacy Series – Deep Cycle Lithium Batteries. Watch a video on how to read a RELiON data sheet.


  • Rated up to 48V. Nominal Voltage: 51.2V
  • Parallel connections made up to 12 units.
  • Recommended Charge Voltage: 56.0 V - 58.4 V (Solar applications)
  • Discharge Temperature: -4 to 131 ºF (-20 to 55 ºC)
  • Charge Temperature: -4 to 131 ºF (-20 to 55 ºC)
  • Download Data Sheets: RB48V100, RB48V200, RB48V300,BCI Group Chart
  • Recommended charger is 90PCI4818CH
  • Storage Temperature: 23 to 95 ºF (-5 to 35 ºC)
  • 10-year Warranty – 7 Year Free Replacement or Repair Period
  • Rated for UN38.3& CE (battery), UL1642 (cells), (File# MH64523), IEC62133 (cells), Shipping Classification UN 3480, CLASS 9
  • *Can not be shipped outside the US contiguous states
  • *All RELiON Hazmat items are not eligible for return to Del City. Please review our return policy.
  • *Potential 1-2 week shipping delay for all hazmat items

Item Description Price Qty in
Package 		Add to Cart
RB48V100 RELiON RB48V100, LIFEPO4 Legacy Lithium Battery 48V, Not Series Capable, 51.2V, 1051.2V 100 Amp Hour, HAZMAT drawing 3,495.95 1 EA
RB48V200 RELiON RB48V200, LIFEPO4 Legacy Lithium Battery 48V, Not Series Capable, 51.2V, 200 Amp Hour, HAZMAT drawing 6,995.95 1 EA
RB48V300 RELiON RB48V300, LIFEPO4 Legacy Lithium Battery 48V, Not Series Capable, 51.2V, 300 Amp Hour, HAZMAT drawing 9,995.95 1 EA

RELiON® Legacy Accessories - Digital Monitor

RELiON® Legacy Series

RELiON® Legacy Series null

Mastervolt BattMan Battery digital monitors are manufactured 12/24 V DC with large, splash proof display (IP65) and a power bar. These are an affordable battery monitor that provides critical information about the status of your battery bank under all circumstances. Moreover it will warn you when your battery bank is empty. The BattMan Pro Digital Monitor displays the remaining time until your battery needs to be charged and stores special battery status events. These can be used in Marine, RV and Solar applications.


  • Number of battery outlets: 2; service (fully), starter (voltage)
  • BattMan Lite Display/read-out: voltage, current, amp-hours, time remaining, battery capacity in %
  • BattMan Pro Display/read-out: voltage, current, amp-hours, time remaining, battery capacity in %, special battery status events
  • BattMan Pro collects historical data and displays remaining time indication
  • Voltage range: 0-35 V
  • MasterBus compatible: No
  • Connection cable (6-wire) necessary: Yes
  • Modular cable necessary: No
  • Download Data Sheets: 9070405060, 9070405070, BCI Group Chart
Item Description Price Qty in
Package 		Add to Cart
9070405060 Mastervolt 70405060, BattMan Lite Digital Monitor, 12/24V drawing 278.95 1 EA
9070405070 Mastervolt 70405070, BattMan Pro Digital Monitor, includes shunt for use with Legacy (RB) batteries, 12/24V drawing 343.95 1 EA
Prop65 Warning