RELiON RB52 12V 52Ah Lithium Deep Cycle Battery The RB52 is a 12V 52Ah lithium marine deep cycle battery. RELiON RB52 offers abundant power in a small footprint. It is 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. Applications: Marine, Recreational Vehicles, Solar, Camping, AWP & Floor Machines Electrical Specifications Capacity @ 25A: 120 min Resistance: �?50 Megaohm @ 50% SOC Efficiency: 99% Self Discharge: <3% per Month Maximum Modules in Series: 4 Mechanical Specifications Cell Type: Cylindrical Chemistry: 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: 170 A �20 A (10 �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: 9.2 V (2.3 �0.1 vpc) Short Circuit Protection: 200-600 �s Charge Specifications Recommended Charge Current: 2.5 A - 25 A Maximum Charge Current: 52 A Charge Current 32 to 14F (0 to -10 C): �?0.1 C Charge Current -4 to 14F (-20 to -10 C): �?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) (1.1 �0.4 s) Reconnect Voltage: 15.2 V (3.8 �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) *Refer to charge currents below 0C (32F) 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)