product image
PRICE: $514.95

FREE GROUND SHIPPING (Usually ships within 1 - 2 business days.)

* Within the continental U.S. only

This efficient and fast-charging 12V 40ah lithium battery is powerful yet compact enough to fit in many deep cycle applications. The RB40 is a lithium iron phosphate (LiFePO4) battery with more power, less weight and up to 10x longer life than its lead-acid counterparts. Lithium is the logical choice for applications that will exhaust the batteries or run in extreme weather. RELiON lithium batteries provide more energy for high consumption than traditional lead-acid batteries. Lead-acid batteries also need to be maintained. If they are not maintained properly, their life span is shortened. Because lithium batteries require no active maintenance, a one-time purchase guarantees better lifetime value.

The RB40 is suitable in many outdoor and recreation applications where lighter weight and capacity are key. It’s commonly used in the following applications: fishing electronics, robotics, solar lighting, remote power, outdoor adventures, and other deep cycle applications.

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.

PRODUCT SPECIFICATIONS
  • Voltage: 12.8V
  • Amp Hours: 40Ah
DIMENSIONS & WEIGHT
  • Length: 7.8 in (197 mm)
  • Width: 6.5 in (166 mm)
  • Height: 6.8 in (173 mm)
  • Weight: 11.9 lbs (5.4 kg)
APPLICATIONS
  • AWP
  • Floor Machines
  • Solar

DATA SHEET

DOWNLOAD PDF

Chemical Specifications

Nominal Voltage 12.8 V
Nominal Capacity 40 Ah
Capacity @ 25A 96 min
Energy 512 Wh
Resistance ≤50 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Modules in Series 4

Mechanical Specifications

Dimensions (L x W x H) 7.8 x 6.5 x 6.8” 197 x 166 x 173 mm
Weight 12 lbs (5.4 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 40 A
Peak Discharge Current 80 A (7.5 s ±2.5 s)
BMS Discharge Current Cut-Off 170 A ±20 A (20 ±5 ms)
Recommended Low Voltage Disconnect 11 V
BMS Discharge Voltage Cut-Off 8 V (2.0 ±0.08 vpc) (140 ±60 ms)
Reconnect Voltage 10 V (2.5 ±0.1 vpc)
Short Circuit Protection 200-600 µs

Charge Specifications

Recommended Charge Current 2 A - 20 A
Maximum Charge Current 40 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 15.2 V (3.8 ±0.025 vpc)
(1.1 ±0.4 s)
Reconnect Voltage 14.4 V (3.6 ±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 23 to 95 ºF (-5 to 35 ºC)
BMS High Temperature Cut-Off 176 ºF (80 ºC)
Reconnect Temperature 122 ºF (50 ºC)
*Refer to charge currents below 0°C (32°F)

Compliance Specifications

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

PERFORMANCE CHARACTERISTICS

graph
graph
graph
graph
graph
graph

HAVE ADDITIONAL QUESTIONS?

Our team of dedicated LiFePO4 specialists can help!

Contact Us

We're Invested In Our Lithium Iron Phosphate Batteries