Cold Weather Lithium Batteries

RB20-LT 12V 20Ah LiFePO4 Battery

The RB20-LT is a 12V 20Ah lithium battery and is part of RELiON’s Low Temperature Series. This lithium iron phosphate battery is specially designed for cold weather performance. RELiON’s LT Series batteries can safely charge at temperatures down to -20°C (-4°F) using a standard charger. The system features proprietary technology which draws power from the charger itself, requiring no additional components.

The entire process of heating and charging with the LT Series is completely seamless. Simply plug the battery in to 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 RB20-LT is ideal in a variety of applications including small solar energy systems, remote monitoring, LED lighting and traffic control cameras. It has all the benefits of lithium batteries including installation flexibility and no maintenance, with the added ability to charge in cold weather climates. It’s equipped with an M6 terminal type and a built-in battery management system (BMS).

PRODUCT SPECIFICATIONS

• Voltage: 12.8V
• Amp Hours: 20Ah

DIMENSIONS & WEIGHT

• Length: 7.1 in (181 mm)
• Width: 3 in (76 mm)
• Height: 6.7 in (169 mm)
• Weight: 6.6 lbs (3 kg)

APPLICATIONS

• Solar
• Camping

DATA SHEET

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ELECTRICAL SPECIFICATIONS
Nominal Voltage	12.8V
Nominal Capacity	20 Ah
Capacity	48 min
Energy	256 Wh
Resistance	≤45 mΩ @ 50% SOC
Efficiency	99%
Self Discharge	<3% per Month
Maximum Batteries Connected in Series	1 (Single Use)

MECHANICAL SPECIFICATIONS
Dimensions (L x W x H)	7.1 x 3.0 x 6.7” (181 x 76 x 169 mm)
Weight	6.6 lbs (3 kg)
Terminal Type	M6 x 1.0
Terminal Torque	35 - 44 in-lbs (4 - 5 N-m)
Case Material	ABS
Enclosure Protection	IP66
Cell Type - Chemistry	Cylindrical - LiFePO4

DISCHARGE SPECIFICATIONS
Maximum Continuous Discharge Current	20 A
Peak Discharge Current	40 A (7.5 s ±2.5 s)
Discharge Over-Current Protection	50 A ±8 A (32 ±8 ms)
Recommended Low Voltage Disconnect	11.0 V
Discharge Under-Voltage Protection	8.0 V (2.0 ±0.08 vpc) (20 ±8 ms)
Reconnect Voltage	9.04V (2.26 ±0.34 vpc)
Short Circuit Protection Response Time	100-600 μs

CHARGE SPECIFICATIONS
Recommended Charge Current	1 A - 10 A
Maximum Continuous Charge Current	20 A
Recommended Charge Voltage	14.2 V - 14.6 V
BMS Charge Voltage Cut-Off	15.6 V (3.9 ±0.025 vpc) (1 ±0.3 s)
Reconnect Voltage	14.6 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)
Recommended Storage Temperature	23 to 95 ºF (-5 to 35 ºC)
BMS High Temperature Cut-Off - Discharge	185 ºF (85 ºC)
BMS High Temperature Cut-Off - Charge	140 ºF (60 ºC)
Reconnect Temperature	122 ºF (50 ºC)

HEATING ELEMENT SPECIFICATIONS
Heating Temperature Range	-4 to 50 ºF (-20 to 10 ºC)
Heating Time	Approximately 1 hr @ 3 A

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

Typical Lithium Iron Phosphate Characteristics