Description
Projecta HDBC35 Battery Charger 6V/12V/24V 21 Amp
Heavy-duty workshop battery charger delivering 21A across 6V, 12V, and 24V lead-acid batteries, with automatic and manual charging modes, a 0–14 hour programmable timer, and LED volt and amp display, purpose-built for mechanical workshops, auto electricians, and fleet service operations running from 240VAC mains power.
Product Overview
The Projecta HDBC35 is a professional workshop battery charger designed for mechanical workshops, auto electricians, and fleet service facilities requiring a reliable, multi-voltage charger capable of handling the full range of lead-acid batteries encountered in a busy service environment. With the ability to charge 6V, 12V, and 24V batteries from a single unit, the HDBC35 eliminates the need for multiple voltage-specific chargers in the workshop, covering everything from vintage 6V vehicle batteries and standard 12V passenger and light commercial batteries through to 24V truck, bus, and heavy equipment batteries. The 21A output provides a practical workshop charge rate that balances charge speed with battery safety for standard lead-acid charging applications. Both automatic and manual charging modes are available, giving the operator direct control over the charging process when required for specific applications or battery conditions, rather than relying solely on an automatic algorithm. The 0–14 hour programmable timer automatically switches the charger off at the set time, preventing overcharging when the operator steps away from the workshop — particularly useful for overnight charging of multiple batteries without requiring constant supervision. The LED display shows both volt and amp readings throughout the charging process, providing accurate real-time charge status visibility without requiring a separate battery monitor or multimeter. Electrical Safety and EMC compliance confirms the HDBC35 meets the regulatory requirements for electrical equipment in the Australian market. At 13.4kg, the HDBC35 is a substantial workshop unit designed for bench or shelf mounting in a fixed workshop position. Projecta's one-year warranty provides standard coverage for workshop equipment subject to regular professional use.
Features & Benefits
6V, 12V, and 24V Multi-Voltage Operation: Adjustable to suit 6V, 12V, and 24V lead-acid battery charging from a single unit, covering vintage vehicles, passenger cars, light commercial vehicles, trucks, buses, and heavy equipment batteries in a single workshop charger without requiring separate voltage-specific units.
21A Workshop Charge Output: The 21A charge output delivers a practical workshop-grade charge rate suited to restoring discharged lead-acid batteries across the full range of battery capacities encountered in a professional service environment, balancing charge speed with battery safety.
Automatic and Manual Charging Modes: Both automatic and manual operation modes keep the operator in full control of the charging process, allowing manual override for specific charging requirements, battery reconditioning tasks, and applications where automatic mode alone is not sufficient.
0–14 Hour Programmable Timer: The built-in timer automatically switches the charger off at the operator-selected time within a 0–14 hour range, preventing overcharging during overnight or extended charging sessions and eliminating the need for the operator to return to manually disconnect the charger.
LED Volt and Amp Display: Real-time LED display of both voltage and current readings provides accurate charge status visibility throughout the charging cycle, enabling the operator to monitor charge progress and identify abnormal charge conditions without requiring additional test equipment.
Electrical Safety and EMC Compliant: Meets Australian Electrical Safety and EMC regulatory requirements for electrical workshop equipment, confirming the HDBC35 is compliant for use in Australian commercial and trade workshop environments.
240VAC Mains Input: Operates from standard 240VAC Australian mains power, suited to fixed workshop and service bay installations with standard electrical supply.
2-Stage Charging: Two-stage charging provides bulk charge followed by absorption phase for lead-acid battery restoration, delivering a complete and controlled charge cycle suitable for standard workshop battery charging applications.
Heavy-Duty Workshop Construction: Substantial 13.4kg build quality is suited to fixed workshop bench or shelf mounting in busy service environments subject to the daily demands of professional use.
Projecta One-Year Warranty: Backed by Projecta's one-year warranty for workshop equipment.
Technical Specs
| Specification |
Detail |
| Part Number |
HDBC35 |
| Output Voltage |
6V / 12V / 24V |
| Output Current |
21A |
| Input Voltage |
240VAC |
| Charging Stages |
2 Stage |
| Battery Types |
Lead Acid |
| Charging Mode |
Automatic and Manual |
| Timer |
0–14 Hours |
| Display |
LED (Volt and Amp) |
| Compliance |
Electrical Safety, EMC |
| Weight |
13.4kg |
| Warranty |
One Year |
Compatible With / Goes Well With
The Projecta HDBC35 is suited to any mechanical workshop, auto electrical business, or fleet service facility requiring a multi-voltage workshop battery charger for lead-acid battery charging and maintenance. Primary applications include passenger car and light commercial vehicle 12V battery charging, heavy truck and bus 24V battery charging, vintage and classic vehicle 6V battery charging, motorcycle and small engine 6V battery servicing, fleet vehicle battery rotation and maintenance programs, and workshop battery testing and reconditioning workflows.
Pairs well with Projecta battery analysers and testers for a complete workshop battery service solution, workshop battery trolleys and stands for safe battery handling, battery terminal cleaners and maintenance accessories, heavy-duty battery jump starter packs for emergency starting alongside workshop charging, and workshop charging timer accessories for multi-bay charging management.
Frequently Asked Questions
What battery types and voltages is the HDBC35 compatible with?
The HDBC35 is designed for lead-acid battery chemistry across 6V, 12V, and 24V systems. This covers standard flooded wet lead-acid batteries, calcium-calcium batteries, and most conventional workshop battery types across passenger vehicles, light commercial vehicles, trucks, buses, heavy equipment, motorcycles, and vintage vehicles. The HDBC35 is not designed for lithium (LiFePO4), AGM, or GEL battery chemistry — for those chemistries, a multi-chemistry charger such as the Projecta IC25RV is recommended.
What is the difference between automatic and manual charging modes?
In automatic mode, the charger manages the charging cycle through its 2-stage algorithm, transitioning between bulk charge and absorption phases and stopping at the set timer duration without operator intervention. In manual mode, the operator has direct control over the charge rate and process, enabling more targeted charging for specific applications such as battery reconditioning, equalisation charging of multi-cell lead-acid banks, or situations where the automatic algorithm does not suit the battery condition. Manual mode requires closer operator supervision to prevent overcharging.
How does the 0–14 hour timer work?
The timer allows the operator to set a charging duration between 0 and 14 hours before beginning a charge session. Once the set time elapses, the charger automatically switches off, stopping the charge cycle regardless of the battery's state of charge at that point. This prevents overcharging during overnight or unattended charging sessions and is particularly useful in busy workshops where batteries are left on charge between shifts. Set the timer based on the battery's estimated charge time for its capacity and depth of discharge — consult the HDBC35 manual for recommended timer settings for different battery sizes and discharge levels.
Is the HDBC35 suitable for charging truck and bus 24V battery systems?
Yes. The HDBC35's adjustable multi-voltage operation covers 24V charging for trucks, buses, and heavy equipment with 24V electrical systems. When charging a 24V system, the 21A output provides an appropriate charge rate for the large-capacity batteries typically used in heavy commercial vehicles. Ensure the charger is correctly set to 24V before connecting to avoid incorrect voltage application to the battery.
What does the LED volt and amp display show during charging?
The LED display provides real-time voltage and current readings throughout the charging process. Voltage readings allow the operator to monitor the battery's state of charge and verify it is rising correctly during the charge cycle. Current readings show the charge rate being applied at any given point, which naturally decreases as the battery approaches full charge in automatic mode. Together, these readings provide accurate charge status visibility without requiring a separate multimeter or battery monitor, enabling the operator to identify flat, faulty, or sulphated batteries that are not accepting a normal charge current.
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