12V 25A Battery Charger, Maintainer and Power Supply

Price: $575.00 AUD $449.00 AUD Online Sale
  • OC-1225U
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OC-1225U 12 Volt 25AMP Charger & Maintainer and Power Supply

The OzCharge OC-1225U Battery Charger and Maintainer is designed for lead-acid type batteries (AGM, Calcium SMF, Gel & Wet) from 6Ah to 500Ah. The charger can also be used to maintain batteries up to 750Ah.

The OC-1225U battery charger and maintainer utilises state of the art 9 stage technology for safe and efficient charging of a wide range of batteries. The OC-1225U is designed for charging and maintaining Car, Boat, RV, and large battery bank and deep cycle batteries. The charger can also safely be a used for smaller batteries including motorbikes, jet skis, ATVs and garden equipment. The charger is fully automatic allowing the charger to be left on 24/7 with confidence and ensuring that your batteries will perform better and last longer 

Power Supply Mode

In this mode the charger is now converting to a constant current and constant voltage power supply allowing you to power 12V appliances,or retain memory when replacing a battery. To enter power supply mode press & hold the Charge Rate button for 3 seconds to activate Power Supply Mode. When in Power Supply Mode, the Pwr. Supply LED will be ON.

Selectable Ouput - 25A, 15A, 2A

The OC-1225U features a selectable output allowing you to choose whether to output at: 25A,15A or 2A. This makes the OC-1225U an extremely versatile charger and suitable for a very wide range of batteries.

Selecting the correct charge rate setting for your battery

When using the OC-1225U it is important to select the correct charge rate for the battery you are charging. A common mistake many people make is to select the highest charge rate setting, not realising it may damage the internal components, reducing the battery life. The recommended charging Amps for a flooded lead acid battery is roughly 10% of its Ah rating. For an Absorbed Glass Mat (AGM) or Gel battery this can be increase to 20% of its Ah rating.

If you are unsure of the Ah rating of your battery please check the specifications on the battery or contact your battery's manufacturer

The 2A - maintenance mode - will charge a range of lead acid batteries between 6 and 40Ah and will maintain batteries up to 200Ah.

The 15A - silent charge mode - will charge a range of lead acid batteries between 45 and 300Ah and will maintain batteries up to 450Ah. 

The 25A - rapid charge mode - will charge a range of lead acid batteries between 75Ah and 500Ah and will maintain batteries up to 750Ah. During this mode, the internal fan may engage from time to time if the charger gets hot.



  • Fully automatic 9 stage charging
  • Charges 12V batteries from 6Ah-500Ah
  • Maintenance (trickle) charging up to 750Ah for longer life batteries
  • Power Supply Mode
  • Patented desulphation and battery reconditioning function
  • Includes both ring terminal and crocodile connections
  • 2 year warranty
  • Life time support

    OC-1225U 12Volt 12V 25A 25AMP Automatic 9 stage battery charger maintainer ozcharge

  • Battery Charging vs. Battery Maintenance

    What's the difference between the two and which battery charger suit your requirements best? Firstly you need to determine whether you need to recharge a flat battery entirely or just keep a battery at full charge.

    Battery charging is when you are requiring to recharge a flat or dead battery to full. Battery maintenance on the other hand is when you just want to keep a battery topped up. For instance, if you're storing a classic car that you only drive a few times a month but want to ensure it's ready to go on a sunny afternoon you would require battery maintenance as opposed to battery charging. This is often referred to as trickle charging a battery. All OzCharge battery chargers perform both functions, and understanding each charger's limits is important. 

     12V 25A battery charger and power supply ozcharge

    *Please refer to OC-1225U in specifications below. 

    RJ Batteries Stockists of OzCharge Battery Chargers & Jump StartersTotal Tools Stockists of OzCharge Jump Starters & Battery ChargersBattery World Stockists of OzCharge Battery Chargers & Jump StartersHarvey Norman Online Stockists of OzCharge Battery Chargers & Jump Starters


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