The RB52-LT is a 12V 52Ah lithium battery and is part of RELiON's Low-Temperature Series. This compact and powerful lithium iron phosphate battery is specially designed for cold weather performance. RELiON's LT Series batteries can safely charge at temperatures down to -20C (-4F) using a standard charger. The system features proprietary technology which draws power from the charger itself, uniformly heating the cells within the battery to 41F (5C), so that it can be charged at its full recommended current. LT batteries require no additional components such as heating blankets.

The entire process of heating and charging with the LT Series is completely seamless. Simply plug the battery into the regular lithium charger and the internal heating and monitoring system takes care of the rest. Because it takes time to heat the cells, the charging process in below-freezing temperatures could take a little longer.

The Low-Temperature Series battery has the same size and performance as other RELiON batteries but can safely charge when temperatures drop as low as -20C using a standard charger. The RB52-LT is a perfect choice for use in off-grid solar, remote monitoring, and in any application where charging in colder temperatures is necessary.

Product Specifications

• Voltage: 12.8V
• Amp Hours: 52Ah
• Product Specifications | Download

Dimensions & Weight

• Length: 7.8 in (197 mm)
• Width: 6.5 in (166 mm)
• Height: 6.8 in (173 mm)
• Weight: 14.1 lbs (6.38 kg)

Applications

• Backup Power
• Marine
• Recreational Vehicles
• Solar
• Camping

ELECTRICAL SPECIFICATIONS
Nominal Voltage	12.8 V
Nominal Capacity	52 Ah
Capacity @ 25A	120 min
Energy	640
Resistance	?50 m? @ 50% SOC
Efficiency	99%
Self Discharge	<3% per Month
Maximum Modules in Series	1 (Single-use)

MECHANICAL SPECIFICATIONS
Dimensions (L x W x H)	7.8 x 6.5 x 6.8” (197 x 166 x 173 mm)
Weight	14.1 lbs (6.38 kg)
Terminal Type	M8 x 1.25 x 12mm
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	50 A
Peak Discharge Current	100 A (7.5 s 2.5 s)
BMS Discharge Current Cut-Off	150 A 20 A (10 5 ms)
Recommended Low Voltage Disconnect	11 V
BMS Discharge Voltage Cut-Off	9.2 V (2.3 0.1 vpc) (140 60 ms)
Reconnect Voltage	10 V (2.5 0.1 vpc)
Short Circuit Protection	200-600 ?s

CHARGE SPECIFICATIONS
Recommended Charge Current	2.5 A - 25 A
Maximum Charge Current	50 A
Charge Current 14 to 32 F (-10 to 0 C)	?0.1 C
Charge Current -4 to 14 F (-20 to -10 C)	?0.05 C
Recommended Charge Voltage	14.2 V - 14.6 V
BMS Charge Voltage Cut-Off	15.4 V (3.85 0.025 vpc) (1.1 0.4 s)
Reconnect Voltage	14.6V (3.65 0.05 vpc)
Balancing Voltage	14.4 V (3.6 0.025 vpc)

TEMPERATURE SPECIFICATIONS
Discharge Temperature	-4 to 140 F (-20 to 60 C)
Charge Temperature	-4 to 113 F (-20 to 45 C)
Storage Temperature	23 to 95 F (-5 to 35 C)
BMS High Temperature Cut-Off	176 F (80 C)
Reconnect Temperature	122 F (50 C)

HEATING ELEMENT SPECIFICATIONS
Heating Temperature Range	-4 to 41 F (-20 to 10 C)
Heating Time	1 hr @ 4 A

COMPLIANCE SPECIFICATIONS
Certifications	UN38.3 (battery)
CE (battery)
UL1642 (cells) (File# MH64523)
IEC62133 (cells)
Shipping Classification	UN 3480, CLASS 9