RELiON Lithium Battery RB52 Group 31 12V 52Ah Marine Deep Cycle

This new RELiON Legacy Series Lithium Battery RB52 is a compact 12-volt, Group 31 lithium iron phosphate (LiFePO₄) deep cycle battery designed for marine, RV, solar, and mobile power applications where space efficiency and reliable performance are critical. Offering 52 amp hours of capacity in a smaller footprint, this battery is ideal for users who need dependable lithium power without the size of a full-capacity Group 31 battery.

Built with a durable ABS enclosure and an integrated Battery Management System (BMS), the RB52 provides safe operation, fast charging, and long cycle life with zero maintenance. Its high efficiency and lightweight construction make it a practical replacement for smaller AGM, GEL, or lead-acid batteries while delivering superior usable energy.

Key Specifications

• Manufacturer Part Number: RB52

• Series: Legacy Series

• Voltage: 12 Volt

• BCI Group Number: 31

• Battery Type: Marine Deep Cycle

• Electrolyte Style: Lithium Iron Phosphate (LiFePO₄)

• Amp Hour Rating: 52 AH

• Cold Cranking Amps (CCA): 100 Amps

• Cranking Amps: 50 Amps

• Reserve Capacity: 120 Minutes

• Terminal Location: M8 Threaded Stud Top Terminals

• Case Material: ABS

• Length: 7.8 Inches

• Width: 6.5 Inches

• Height: 6.8 Inches

• Marine Rated: Yes

• Universality: Fully Universal

• Ingress Protection: IP65

Features & Benefits

• Safe and stable LiFePO₄ lithium chemistry for long-term reliability

• Integrated Battery Management System (BMS) ensures protection and accurate state-of-charge monitoring

• Ultra-fast charging and high-efficiency discharge performance

• Up to 99% efficiency for maximum usable power

• Compact, lightweight design ideal for space-limited installations

• Maintenance-free operation with no watering or corrosion

• Durable ABS enclosure for harsh marine and mobile environments

• Capable of charging in temperatures from -20°C to 45°C

Applications

• Marine deep cycle power systems

• RV and camper battery setups

• Solar energy storage

• Off-grid and mobile power solutions

• Replacement for small-format lead-acid batteries

Warranty

• Limited 10-Year Product Warranty

• 3-Year Free Replacement Warranty

• Non-Returnable Item