FULLRIVER
12V 55Ah 620CCA High Crank Battery (HC55)
12V 55Ah 620CCA High Crank Battery (HC55)
SKU:HC55
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⥠FULLRIVER HC55 12V 55AH HIGH CRANK AGM BATTERY
620CCA High-Performance Starting Battery â 1300A PHCA, Group 51 & M6 Button Terminals
đ„ Elite cranking performance, rapid current delivery and heavy-duty AGM construction for demanding engine-starting applications.
The Fullriver HC55 is a high-performance 12V 55Ah High Crank AGM battery engineered for vehicles and equipment requiring serious starting power, dependable ignition and consistent high-current output under demanding conditions.
Delivering 620CCA, 745A CA / MCA, 890A HCA and an impressive 1300A pulse hot-cranking output, the HC55 provides substantial starting capability for compatible performance vehicles, motorsport applications, 4WDs, off-road vehicles, marine engines and other high-demand starting systems.
High-compression cells, pure lead grids, advanced thin-plate technology and low 7.2mΩ internal resistance combine to support rapid energy transfer, while the heavy-duty flame-resistant ABS case is designed for demanding and high-vibration environments.
⥠KEY FEATURES
đ 620CCA High Cranking Output
Provides powerful cold-starting performance for compatible engines and demanding starting systems.
⥠745A CA / MCA
Delivers substantial cranking capability for compatible automotive and marine starting applications.
đ„ 890A Hot Cranking Amps
Provides serious engine-starting performance under warmer operating conditions.
đ„ 1300A Pulse Hot Cranking Amps
Delivers an intense short-duration current burst for demanding ignition and starting requirements.
đ 12V 55Ah AGM Battery
Combines substantial stored capacity with serious high-current engine-starting capability.
⥠Low 7.2mΩ Internal Resistance
Supports rapid energy transfer and efficient high-current delivery when maximum cranking power is required.
đ High-Compression Internal Construction
Designed to support dependable current output and durability in demanding vehicle environments.
đĄïž Sealed Non-Spillable AGM Design
Provides clean, maintenance-free operation under normal operating conditions.
đȘ Shock & Vibration Resistant
Heavy-duty internal construction is designed for motorsport, off-road, marine and high-vibration applications.
đ Low Self-Discharge
Specified self-discharge of â€3% per month at 25°C helps the battery retain charge during periods of storage.
𧯠Flame-Resistant ABS Case
Durable ABS plastic housing with a UL94-HB flame-resistance rating.
đ§ M6 Button Terminals
Provides secure high-current electrical connections for compatible starting systems.
đ ENGINEERED FOR SERIOUS ENGINE STARTING
The Fullriver HC55 is purpose-built for applications where rapid high-current discharge and dependable engine cranking are essential.
Its high-compression cells, pure lead grids and thin-plate construction allow substantial current to be delivered quickly, helping provide strong ignition performance under high electrical loads and demanding starting conditions.
This makes the HC55 particularly well suited to compatible high-performance street vehicles, motorsport applications, 4WDs, off-road vehicles, marine starting systems and extreme-use equipment.
â ïž IMPORTANT: The HC55 is designed primarily as a high-current starting battery and should not be treated as a dedicated deep-cycle battery.
đ„ EXTREME CRANKING PERFORMANCE
The HC55 provides multiple cranking ratings to demonstrate its substantial starting capability across different operating conditions.
- Cold Cranking Amps: 620A CCA
- Cranking Amps / Marine Cranking Amps: 745A CA / MCA
- Hot Cranking Amps: 890A HCA
- Pulse Hot Cranking Amps: 1300A PHCA
- Short Circuit Current: 1729A
Combined with its low internal resistance, the HC55 is engineered to deliver substantial current quickly when the starter motor demands it.
⥠LOW INTERNAL RESISTANCE
The HC55 has a specified internal resistance of approximately 7.2mΩ.
Low internal resistance helps reduce voltage drop under heavy starting loads and supports rapid current transfer to the starter system.
This is particularly valuable in demanding performance applications where reliable ignition and strong cranking response are essential.
đ BUILT FOR SHOCK, VIBRATION & EXTREME USE
The HC55 features high-compression internal cells and a heavy-duty reinforced battery case designed for challenging vehicle environments.
This construction supports dependable performance in compatible motorsport, off-road, marine and powersports applications where vibration and shock can place additional stress on a battery.
It is engineered for installations where both serious starting output and physical durability are required.
đĄïž ADVANCED AGM CONSTRUCTION
The HC55 uses sealed Absorbed Glass Mat technology to retain electrolyte within the internal battery structure.
This non-spillable design provides maintenance-free operation under normal conditions and offers greater installation flexibility than conventional flooded batteries.
The battery should always be securely restrained and installed according to the requirements of the vehicle, equipment and battery manufacturer.
âïž COLD-WEATHER PERFORMANCE
The HC55 is designed for operation across a temperature range of approximately -20°C to +50°C.
When operating below 0°C, maintaining the battery at or above 60% state of charge is recommended to support dependable cranking performance.
Correct battery charge becomes particularly important in colder conditions where engine-starting demands can increase.
đ 55AH CAPACITY & STRONG RESERVE POWER
The HC55 provides 55Ah capacity at the 20-hour rate and 47.5Ah at the 5-hour rate.
Reserve capacity is rated at approximately 100 minutes at a 25A load and approximately 17 minutes at a 75A load.
This combination of substantial stored energy and strong high-current output makes the HC55 a capable starting battery for demanding compatible applications.
đ CHARGING SPECIFICATIONS
Correct charging is essential for maintaining battery performance and service life.
Maximum charge current: 25% of C20 capacity
For a 55Ah C20 battery, this equates to approximately 13.75A maximum charge current.
Absorption voltage: 14.4Vâ14.7V
Float voltage: 13.5Vâ13.8V
Use charging equipment suitable for sealed AGM battery chemistry and the specified charging voltage range.
đ PRODUCT SPECIFICATIONS
Brand: Fullriver
Model: HC55
Battery type: High Crank AGM Starting Battery
Nominal voltage: 12V
Group size: 51
Capacity at 20HR rate: 55Ah
Capacity at 5HR rate: 47.5Ah
Cold Cranking Amps: 620A CCA
Cranking Amps / Marine Cranking Amps: 745A CA / MCA
Hot Cranking Amps: 890A HCA
Pulse Hot Cranking Amps: 1300A PHCA
Short circuit current: 1729A
Internal resistance: 7.2mΩ
Self-discharge at 25°C: â€3% per month
Reserve capacity at 25A: 100 minutes
Reserve capacity at 75A: 17 minutes
Operating temperature: -20°C to +50°C
Terminal type: M6 button terminal
Recommended terminal torque: 5.6â7.9 N·m
Case material: ABS plastic
Flame-resistance rating: UL94-HB
Maximum charge current: Approximately 13.75A / 25% of C20
Absorption voltage: 14.4Vâ14.7V
Float voltage: 13.5Vâ13.8V
Primary application: High-current engine starting
đ DIMENSIONS & WEIGHT
Length: 138mm
Width: 229mm
Case height: 208mm
Height including terminals: 212mm
Weight: Approximately 18.0kg / 39.68lb
đ IDEAL APPLICATIONS
- High-performance street vehicles
- Racing and motorsport vehicles
- Competition vehicles
- 4WD and off-road vehicles
- Marine engine-starting applications
- Powersports vehicles
- Extreme-use vehicles
- Performance engines requiring high cranking output
- High-vibration environments
- Other compatible high-current starting systems
đŠ WHATâS INCLUDED?
- 1 Ă Fullriver HC55 12V 55Ah 620CCA High Crank AGM Battery
â ïž FITMENT & COMPATIBILITY INFORMATION
Please confirm all electrical and physical specifications against your existing battery and vehicle requirements before purchasing.
Check the required:
- Battery voltage â 12V
- Battery technology â AGM
- Battery capacity
- Group size â 51
- Physical dimensions
- Terminal type â M6 button terminal
- Terminal orientation and polarity
- CCA requirement
- Charging-system compatibility
- Available installation space
- Engine-starting application
â ïž IMPORTANT: Do not purchase based on capacity or group size alone. Battery dimensions, terminal layout, cranking requirements, battery chemistry and charging-system compatibility must also match your application.
â FREQUENTLY ASKED QUESTIONS
What type of battery is the Fullriver HC55?
The HC55 is a sealed 12V High Crank AGM battery designed primarily for high-current engine-starting applications.
What is the capacity of the HC55?
The battery is rated at 55Ah at the 20-hour rate and 47.5Ah at the 5-hour rate.
What is the Cold Cranking Amps rating?
The Fullriver HC55 is rated at 620CCA.
What other cranking ratings does the HC55 have?
The supplied specifications include 745A CA / MCA, 890A HCA and 1300A PHCA.
What is the short circuit current?
The supplied short circuit current specification is 1729A.
What is the internal resistance?
The HC55 has a specified internal resistance of approximately 7.2mΩ, supporting rapid high-current delivery.
What is the reserve capacity?
The HC55 provides approximately 100 minutes of reserve capacity at a 25A load and approximately 17 minutes at a 75A load.
Is the HC55 suitable for performance vehicles?
Yes. It is designed for compatible high-performance vehicles requiring substantial cranking output and durable AGM construction.
Is the HC55 suitable for racing and motorsport applications?
It is designed for compatible high-performance and motorsport applications where its physical dimensions, terminal configuration, cranking output and charging requirements match the vehicle.
Can the HC55 be used in a 4WD or off-road vehicle?
Yes, where the vehicle requires a compatible 12V AGM starting battery with matching physical dimensions, terminal configuration and cranking specifications.
Can the HC55 be used for marine starting?
It may be suitable for compatible marine engine-starting applications where its voltage, dimensions, M6 terminal configuration and cranking performance meet the system requirements.
Is the HC55 suitable for powersports equipment?
It may be suitable for compatible powersports equipment where the batteryâs physical dimensions, weight, electrical requirements and terminal arrangement are appropriate.
Is the HC55 a deep cycle battery?
No. The HC55 is designed primarily for high-current engine starting rather than repeated deep-cycle discharge.
Is the HC55 maintenance-free?
Yes. Its sealed AGM construction means routine electrolyte top-ups are not required under normal operating conditions.
Is the HC55 non-spillable?
Yes. Its sealed AGM construction is designed to provide non-spillable operation under normal conditions.
Can the HC55 be mounted in different orientations?
The sealed AGM construction provides greater installation flexibility than a conventional flooded battery. Always securely restrain the battery and confirm the proposed mounting orientation is suitable for the vehicle, enclosure and manufacturer requirements.
What group size is the HC55?
The supplied group size is Group 51. Group size alone does not guarantee fitment, so dimensions, terminal layout and polarity should also be checked.
What terminals does the HC55 use?
The HC55 uses M6 button terminals with a recommended tightening torque of 5.6â7.9 N·m.
What are the HC55 dimensions?
The supplied dimensions are approximately 138mm long, 229mm wide and 208mm high at the case, or 212mm high including the terminals.
How much does the HC55 weigh?
The HC55 weighs approximately 18.0kg.
What charger should I use?
Use a charger suitable for sealed AGM batteries with an absorption voltage of approximately 14.4Vâ14.7V and a float voltage of approximately 13.5Vâ13.8V.
What is the maximum charging current?
The specified maximum charge current is 25% of the batteryâs 55Ah C20 capacity, which equates to approximately 13.75A.
Can the HC55 operate in cold weather?
Yes. Its specified operating temperature range is approximately -20°C to +50°C. When operating below 0°C, maintaining the battery at or above 60% state of charge is recommended.
How do I know if the HC55 will fit my vehicle?
Compare the Group 51 case format, supplied 138 Ă 229 Ă 212mm overall dimensions, M6 button terminal configuration, polarity, 12V voltage, 620CCA rating and charging requirements with your existing battery and vehicle specifications before purchase.
đ ELITE 620CCA STARTING POWER FOR DEMANDING APPLICATIONS
Choose the Fullriver HC55 when your application demands serious engine-cranking power, rapid current delivery and rugged AGM construction.
With 620CCA, 1300A pulse hot-cranking capability, 1729A short circuit current, low 7.2mΩ internal resistance and heavy-duty vibration-resistant construction, the HC55 is engineered for compatible performance, motorsport, 4WD, marine and extreme-use starting applications.
Upgrade to dependable high-current Fullriver AGM starting performance.
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