RB52

12V 52Ah Lithium Deep Cycle Battery

The RB52 is a 12V 52Ah lithium marine deep cycle battery. The RB52 offers abundant power in a small footprint. It’s versatile and compact enough to be used in many marine applications including smaller boats with lower battery requirements, boats that require two of the same batteries and boats with electrical systems designed for just one battery.

The RB52 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 marine applications where you need a longer run time and reliability. 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.

PRODUCT SPECIFICATIONS

• Voltage: 12.8V
• Amp Hours: 52Ah

DIMENSIONS & WEIGHT

• Length: 7.8 in (197 mm)
• Width: 6.5 in (166 mm)
• Height: 6.8 in (173 mm)
• Weight: 13.7 lbs (6.2 kg)

APPLICATIONS

• AWP
• Floor Machines
• Marine
• Recreational Vehicles
• Solar
• Camping

 

DATA SHEET

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ELECTRICAL SPECIFICATIONS
Nominal Voltage	12.8 V
Nominal Capacity	52 Ah
Capacity @ 25A	120 min
Energy	640 Wh
Resistance	≤50 mΩ @ 50% SOC
Efficiency	99%
Self Discharge	<3% per Month
Maximum Batteries Connected 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	13.7 lbs (6.2 kg)
Terminal Type	M8 x 1.25
Terminal Torque	80 - 100 in-lbs (9 - 11 N-m)
Case Material	ABS
Enclosure Protection (Waterproof Rating)	IP66
Cell Type - Chemistry	Cylindrical - LiFePO4

DISCHARGE SPECIFICATIONS
Maximum Continuous Discharge Current	52 A
Peak Discharge Current	100 A (7.5 s ±2.5 s)
Discharge Over-Current Protection	170 A ±20 A (10 ±5 ms)
Recommended Low Voltage Disconnect	11.0 V
Discharge Under-Voltage Protection	9.3 V (2.325 ±0.08 vpc) (140 ±60 ms)
Reconnect Voltage	10.5 V (2.625 ±0.1 vpc)
Short Circuit Protection Response Time	About 100μs

CHARGE SPECIFICATIONS
Recommended Charge Current	2.5 A - 25 A
Maximum Continuous Charge Current	52 A
Charge Current 32º to 14ºF (0 to -10 ºC)	≤0.1 C (10 A)
Charge Current -4º to 14ºF (-20 to -10 ºC)	≤0.05 C (5 A)
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	14.5 V (3.62 ±0.05 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	UKCA & CE (battery)
	UN38.3 (battery)
	UL1642 (cells) (File# MH64523)
	IEC62133 (cells)
Shipping Classification	UN 3480, CLASS 9

PERFORMANCE CHARACTERISTICS