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Earth Week Celebration Sale: Save 10% on Our Eco-Friendly Batteries! Use Promo Code EARTH10 at Checkout

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The RB35-X is a 12V 35 Ah lithium deep cycle battery in the RELiON X-Series. Our X-Series batteries allow for higher peak and higher continuous discharge currents compared to our standard lithium batteries of the same size.

This is ideal if you have a physical size constraint but need higher power, or if you want to increase the power but you don’t need the extra energy that comes in our standard lithium offering.

This efficient and fast-charging 12V 35Ah lithium iron phosphate battery is equipped with an M8 terminal type and a built-in battery management system (BMS). All RELiON LiFePO4 batteries have installation flexibility, fast-charging capabilities and are maintenance free.

  • Voltage: 12.8V
  • Amp Hours: 35Ah
  • Length: 7.7 in (195 mm)
  • Width: 5.2 in (131 mm)
  • Height: 6.7 in (171 mm)
  • Weight: 11.4 lbs (5.17 kg)
  • AWP
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Electrical Specifications

Nominal Voltage 12.8 V
Nominal Capacity 35 Ah
Capacity @ 25A 84 min
Energy 448 Wh
Resistance ≤50 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Modules in Series 1

Mechanical Specifications

Dimensions (L x W x H) 7.7 x 5.2 x 6.7” 195 x 131 x 171 mm
Weight 11.4 lbs (5.17 kg)
Terminal Type M8 x 1.25
Terminal Torque 80 - 100 in-lbs (9 - 11 N-m)
Case Material ABS
Enclosure Protection IP66
Cell Type - Chemistry Cylindrical - LiFePO4

Discharge Specifications

Maximum Continuous Discharge Current 70 A
Peak Discharge Current 100 A (7.5 s ±2.5 s)
BMS Discharge Current Cut-Off 160 A ±20 A (9 ±4 ms)
Recommended Low Voltage Disconnect 11 V
BMS Discharge Voltage Cut-Off 8 V (2.0 ±0.08 vpc) (144 ±30 ms)
Reconnect Voltage 8.64 V ±0.96 V (2.16 ±0.24 vpc)
Short Circuit Protection 200-800 µs

Charge Specifications

Recommended Charge Current 1.75 A - 17.5 A
Maximum Charge Current 70 A
Charge Current 32ºF to 14ºF (0 to -10 ºC) ≤0.1 C
Charge Current -4ºF to 14ºF (-20 to -10 ºC) ≤0.05 C
Recommended Charge Voltage 14.2 V - 14.6 V
BMS Charge Voltage Cut-Off 15.6 V (3.9 ±0.025 vpc)
(1.2 ±0.3 s)
Reconnect Voltage 15.2 V (3.8 ±0.050 vpc)
Balancing Voltage 14.4 V (3.6 ±0.025 vpc)

Temperature Specifications

Discharge Temperature -4 to 140 ºF (-20 to 60 ºC)
Charge Temperature* -4 to 113 ºF (-20 to 45 ºC)
Storage Temperature 14 to 95 ºF (-10 to 35 ºC)
BMS High Temperature Cut-Off 167 ºF (75 ºC)
Reconnect Temperature 122 ºF (50 ºC)
*Refer to charge currents below 0°C (32°F)

Compliance Specifications

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




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