• Giantz 12V 20A Car Battery Charger Inverter 20 Amp ATV 4WD Boat Caravan
  • Giantz 12V 20A Car Battery Charger Inverter 20 Amp ATV 4WD Boat Caravan
  • Giantz 12V 20A Car Battery Charger Inverter 20 Amp ATV 4WD Boat Caravan
  • Giantz 12V 20A Car Battery Charger Inverter 20 Amp ATV 4WD Boat Caravan
  • Giantz 12V 20A Car Battery Charger Inverter 20 Amp ATV 4WD Boat Caravan
  • Giantz 12V 20A Car Battery Charger Inverter 20 Amp ATV 4WD Boat Caravan
  • Giantz 12V 20A Car Battery Charger Inverter 20 Amp ATV 4WD Boat Caravan
  • Giantz 12V 20A Car Battery Charger Inverter 20 Amp ATV 4WD Boat Caravan
1 8

Giantz

Giantz 12V 20A Automatic Battery Charger

A flat battery at the wrong moment can ruin a trip. The Giantz 20A Battery Charger recovers and maintains 12V lead acid batteries automatically, with built-in overcharge protection.
$40.93 was $44.80
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    Australia-wide delivery
    30-day returns
    12-month warranty

    Details
    A flat battery is one of those problems that always seems to happen at the worst time — before a long drive, first thing in the morning, or halfway through a trip. The Giantz 20A Battery Charger is a straightforward way to recover dead or low 12V batteries and keep them maintained, whether you're at home in the garage or heading out to work on a vehicle in the field.

    The integrated PWM (Pulse Width Modulation) charging system helps prevent power loss during the charging process, delivering a consistent charge to the battery. Once the battery reaches full charge, an automatic floating charge mode takes over — meaning you can leave it connected without worrying about overcharging or battery damage.

    Built-in protection against over-voltage, over-temperature and short circuits adds another layer of confidence when charging. It's SAA approved, compatible with both gel-cell and wet-cell lead acid batteries, and includes 90cm battery clips to connect directly to your vehicle, boat, ATV, caravan or any 12V setup.

    At 1.2kg and a compact footprint, it's genuinely portable — easy to keep in the back of your 4WD, in your workshop or stowed in a caravan bay for when you need it. Check battery compatibility with your specific setup before use.

    Specifications
    Brand: Giantz
    Input voltage (AC): 210V–240V, 50Hz
    Output voltage (DC): 12V–14.7V
    Charging current: 20A
    Output power: 250W
    Battery clip cable length: 90cm
    Dimensions: 20 x 11 x 6cm
    Weight: 1.2kg
    Certification: SAA approved
    Compatible battery types: Gel-cell and wet-cell lead acid

    What’s Included
    1 x Giantz 20A Battery Charger
    1 x User Manual

    Frequently Asked Questions

    What battery types can this charger be used with?

    This charger is designed for 12V gel-cell and wet-cell lead-acid batteries.

    Is this charger suitable for lithium batteries?

    Lithium compatibility is not specified for this model. Use it only with battery types supported by the charger instructions.

    What charging current does it provide?

    The charger provides up to 20A charging current with an output range of approximately 12V–14.7V.

    Does it stop charging when the battery is full?

    The charger automatically switches to a floating-charge mode once the battery is charged, helping maintain the battery without continuously applying the full charging current.

    What does float charging mean?

    Float charging maintains a fully charged lead-acid battery at a lower charging level instead of continuing to charge it at maximum output. This helps prevent overcharging while keeping the battery ready for use.

    What safety protection does the charger have?

    It includes protection against over-voltage, excessive temperature and short circuits.

    Does it run from a normal Australian power point?

    Yes. The charger accepts 210–240V AC at 50Hz and is SAA approved.

    Can I use it for a car, boat or caravan battery?

    Yes, provided the battery is a compatible 12V gel-cell or wet-cell lead-acid battery.

    How long are the battery leads?

    The battery-clip cable is approximately 90cm long.

    How large is the charger?

    It measures approximately 20 × 11 × 6cm and weighs around 1.2kg.
    ★★★★★

    "Arrived earlier than quoted, Thank you Just Camp for the great service"

    Ross

    ★★★★★

    "Website was easy to navigate and I received my purchase promptly"

    Brenda

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    "Purchased for a great price, service was excellent, postage very quick"

    Lindy

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    "Great product and service A++"

    Anthony

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    "My order arrived faster than expected and the quality was just as good as the big name brands"

    Aaron

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    J
    James Leigh
    Simple to use

    Simple to use, just plug and play.

    Charged up a 1650 CCA truck battery without an issue