Hulk 4x4 HU6552 3.8A 12V 7-Stage Automatic Switchmode Battery Charger

Hulk 4x4 HU6552 3.8A 12V 7-Stage Automatic Switchmode Battery Charger

A fully automatic set-and-forget battery charger for the full range of 12V battery types, the HU6552 charges, recovers, and maintains batteries from 1.2Ah to 120Ah across motorcycles, vehicles, boats, ATVs, and golf carts.

Product Overview

The HU6552 is Hulk 4x4's 3.8A 12V 7-stage fully automatic switchmode battery charger, designed for reliable, unattended charging and maintenance of all common 12V battery types including Lead Acid, GEL, MF (Maintenance Free), EFB, AGM, Calcium, and Lithium. The XB2 Smart Processor automatically diagnoses the battery condition on connection, then sequences through the 7-stage charge process covering recovery, bulk charge, absorption, and maintenance phases without any manual intervention and with no risk of overcharging. Batteries from 1.2Ah up to 120Ah are supported, covering everything from motorcycle batteries to full-size leisure and deep cycle batteries. The charger rescues deeply drained batteries down to 3 volts, extending the usable life of batteries that would otherwise be considered unrecoverable. Constant current charging, spark-proof operation, short circuit protection, and reverse polarity protection are all standard. The memory function retains vehicle settings during battery maintenance. Supplied with interchangeable battery clamps and eyelet terminals that plug directly into the charger lead without tools. IP65 rated for dust and water jet protection. Dimensions are 189 x 63 x 49mm. 2-year warranty.

Features & Benefits

7-Stage Fully Automatic Charge and Maintain: The 7-stage charging sequence automatically manages the full charge cycle from initial diagnosis through recovery, bulk charge, absorption, equalisation, and float maintenance, delivering the correct charge profile at each stage for optimal battery health and longevity without any manual adjustment.

XB2 Smart Processor: The XB2 Smart Processor automatically diagnoses battery condition on connection and adapts the charging sequence accordingly, recovering, charging, and maintaining the battery through the full 7-stage process without user intervention and with no risk of overcharging.

Compatible with All Common 12V Battery Types: The HU6552 charges Lead Acid, GEL, MF, EFB, AGM, Calcium, and Lithium batteries, covering the full range of battery chemistry types found in motorcycles, passenger vehicles, marine, and powersports applications with a single charger.

Charges and Maintains 1.2Ah to 120Ah: The wide supported battery range covers small motorcycle batteries from 1.2Ah through to full-size 120Ah leisure, deep cycle, and vehicle batteries, making the HU6552 suitable across the complete range of 12V battery applications.

Rescues Drained Batteries Over 3 Volts: The recovery mode automatically attempts to rescue deeply discharged batteries with a residual voltage above 3 volts, recovering batteries that standard chargers would refuse to charge, and extending battery service life.

Constant Current Charging: Constant current charging maintains a consistent charge current throughout the bulk phase, providing controlled, efficient charge delivery that protects battery internals from the stress of unregulated charging.

Memory Function: The memory function retains vehicle ECU and radio settings during battery maintenance, preventing the loss of stored preferences that can occur when a battery is disconnected.

Spark Proof, Short Circuit Protected, and Reverse Polarity Protected: The charger is spark proof on connection, fully protected against short circuit conditions, and reverse polarity protected, providing complete safety during connection in vehicle bays, garages, and field use.

IP65 Rated: The IP65 rating confirms the charger is fully dust-proof and protected against water jets, making it suitable for use in workshops, garages, and outdoor environments where exposure to dust and splashing water is expected.

Interchangeable Clamps and Eyelet Terminals: Battery clamps and eyelet (ring) terminals are both included and plug directly into the charger lead without tools, allowing the correct connection type to be selected for each application without carrying a separate set of leads.

Compact Dimensions: At 189 x 63 x 49mm, the HU6552 is compact enough to store in a vehicle, toolbox, or garage shelf without occupying significant space.

2-Year Warranty: Supplied with a 2-year manufacturer's warranty.

Technical Specs

Goes Well With

The HU6552 is well suited as a workshop or garage battery maintenance charger for motorcycles, passenger vehicles, SUVs, boats, ATVs, and golf carts where a single compact charger needs to cover multiple battery types and sizes. It is particularly useful for seasonal or infrequently used vehicles where long-term battery maintenance prevents self-discharge damage during storage. For vehicles with larger battery banks or faster charge requirements, Hulk 4x4's higher-output charger models are the recommended step-up.

Frequently Asked Questions

What battery types is the HU6552 compatible with?

The HU6552 is compatible with Lead Acid (flooded), GEL, MF (Maintenance Free), EFB (Enhanced Flooded Battery), AGM (Absorbent Glass Mat), Calcium, and Lithium 12V batteries. This covers the full range of battery chemistry types found in motorcycles, passenger vehicles, marine vessels, ATVs, and golf carts.

Can the HU6552 recover a completely flat battery?

The HU6552 can recover deeply discharged batteries that retain a residual voltage above 3 volts. Batteries with a voltage below 3 volts cannot be recovered by this charger. For batteries that have been left flat for an extended period, the XB2 Smart Processor will automatically attempt a recovery sequence before proceeding to the standard charge cycle.

Is it safe to leave the HU6552 connected to the battery indefinitely?

Yes. The 7-stage automatic charging sequence includes a float maintenance stage that holds the battery at its optimal fully charged voltage without overcharging, making the HU6552 suitable for indefinite connection as a battery maintainer for stored vehicles, boats, and seasonal equipment.

What is the difference between the battery clamps and eyelet terminals included?

The battery clamps are crocodile-style clips that attach directly to the battery terminals without any installation, suited to temporary charging sessions. The eyelet (ring) terminals are permanently attached to the battery terminals, allowing the charger to be connected and disconnected quickly without accessing the battery directly. Both connection types plug directly into the charger lead interchangeably.

What does IP65 mean for workshop and outdoor use?

IP65 confirms the charger enclosure is completely dust-proof (6) and protected against low-pressure water jets from any direction (5). This makes the HU6552 suitable for use in dusty workshop environments and outdoors where exposure to rain or water splashing is possible, though it is not rated for submersion or high-pressure wash-down.