The OzCharge 12 Volt OC-SW121210 (21 Amp) battery charger & maintainer comprises of the latest microprocessor controlled switched mode technology with the added bonus of a selectable battery Rejuvenation (De-Sulphation) feature which has been proven to break down the crystalline form of lead sulphate within the battery cells which helps extend your battery life.
There is also an automatic Equalisation feature for Calcium batteries which helps to maintain and balance your battery cells. (Manual Equalisation option is also available for Sealed / Wet Battery Type selection)

It is fully automatic with safety timers, reverse polarity, short circuit and overload protection and it comes standard with quick connect crocodile clips and a wall mount bracket.

• High frequency Switching Mode
• Full time pulse charge output
• Microprocessor controlled
• Multi charging rate - (Selectable 2 / 10 / 21 Amps)
• Selectable Battery Type: Calcium / Sealed, WET / GEL

Calcium: Is the new generation Lead Acid Battery with Calcium Content. 

Sealed/Wet: These are the most common and are also known as WET (Flooded) or AGM (Absorbed Glass Mat) Sealed-valve regulated Lead Acid (VRLA) Batteries. (Automotive or Deep Cycle)
Please Check the Battery Electrolyte level for Non-sealed Batteries.

Gel: Sealed type (VRLA), with a jellified electrolyte (Automotive, Aviation, Solar or Deep Cycle)

• Battery rejuvenation (De-Sulphation) function - (Selectable)
• Heavy-duty cables 
• Corrosion-resistant output connectors and clamps
• Designed for Australian & New Zealand Conditions
• 2 Years Warranty

1 - Soft start:
Charges the battery using half the maximum current until the battery voltage is over 10.5V.
(Indicated by the BLUE Charging LED Flashing)
Soft Start occurs if the initial voltage is less than 10.5V due to deep discharge.

2 - Bulk Charge:
Charges using a constant maximum current until the battery rises to the absorption level.
(Indicated by the BLUE Charging LED ON)

3 - Absorption:
This stage charges the battery using a constant voltage providing that the Battery Voltage is over 85%. The Charging Voltage for this stage is determined by the Battery type selection: GEL-14.1V; Sealed/WET-14.4V; Calcium-14.7V.
(Indicated by the BLUE Charging LED ON)
If the Battery Condition is still less than 12.5V after absorption mode, this will be indicated by the GREEN Full LED flashing.

4 - Automatic Equalisation Process:
NOTE: We recommend to disconnect the Battery from the Vehicle before using this feature. If you select the Calcium battery type, the charger will automatically run the equalisation stage during the charging cycle, (You do not need to manually Press the Equalisation Button for Calcium Batteries)
The Equalisation process will not work for GEL Batteries.
To manually activate this equalisation feature for Sealed/Wet Batteries, simply press and release the ‘Equalisation’ Button and the Equalisation LED will turn ON (RED).
Once this feature is activated, the Equalisation feature does not start straight away, it only begins once the Absorption mode has finished. 
Equalisation is indicated by the Absorption GREEN LED Flashing. Note: Equalisation Mode will not work if the Charger is in Full Mode. The Button must be pressed during the charging cycle.
Depending on the charge rate selected, this process will time out after 1 to 12 hours. Depending on charge rate, battery size and battery condition.
Equalising voltage is set to 15.5V for Sealed / WET Conventional batteries and 16.2V for Calcium batteries.
To prevent the ‘Equalisation’ mode from Starting or to stop ‘Equalisation’ mode for Sealed/Wet Batteries, simply Press and Release the ‘Equalisation’ Button again and the Equalisation LED will turn OFF.
For manual equalisation, always refer to your battery manufacture’s recommendations / specifications.

5 - Analysis:
Diagnoses the battery condition for ten minutes. If the Full LED is flashing, this indicates that the battery is still less than 12.5V after the absorption mode and that there is a fault with the battery.
(Indicated by the GREEN Full LED ON)

6 - Full / Float:
Battery is fully charged and is ready for use. It will be maintained at a safe constant voltage. Battery type selection: GEL-13.8V; Sealed/WET-13.8V; Calcium-13.8V.
(Indicated by the GREEN Full LED ON)

7 - Rejuvenation Process (EXTEND YOUR BATTERY LIFE)
Your OzCharge Battery Charger provides a battery rejuvenation function. What does this feature do?? - Rejuvenation has been proven to break down the crystalline form of lead sulphate within the battery cells which helps extend your battery life.
We recommend that you periodically use this rejuvenation (De-Sulphate) feature to ensure you get the maximum life out of your battery.
To activate this rejuvenation feature, simply press and hold the 'Select Battery Type' Button for 3 Seconds until the Rejuvenation LED begins flashing (YELLOW). Once the charger has entered the rejuvenation (de-sulphate) charging stage, the process will automatically time out after 24 hours or you can manually stop this process at any time by pressing and holding down the 'Select Battery Type' Button for 3 seconds.