Temperature compensation
A sensor will automatically adjust the charging voltage if the temperature deviates between -20 °C and +45 °C. A
high temperature environment will lower the voltage, and freezing condition is handled by higher voltage.
Voltage compensation
Because of some voltage drop in the cables, the actual voltage at the clamps of the battery can be lower than the
charger output voltage. A special circuitry inside the unit will monitor the true input voltage to the battery and adjust
the output voltage of the unit accordingly. This will maximize the charging efficiency.
Reverse-polarity protection
This unit offers reverse-polarity protection, the red LED
will illuminate and the charging process will not start. If
this happens, unplug immediately from mains, connect the red crocodile clamp to the positive (+) battery post and
black crocodile clamp to negative (-) post, then plug into the mains power and the charging process will start.
Short-circuit protection
Should you accidentally touch the crocodile clamps together whilst the mains power is on, the unit will not perform
charging. Unplug from mains, disconnect and start the process again being careful not to touch the clamps together.
Charge memory
If power turns off while charging, the unit will restart with previous settings.
Note: Once the crocodile clamp has been disconnected from the battery, this memory is erased and the charging
mode will need to be selected again.
OPERATION
1. Preparing the battery
Firstly remove the caps from each cell and check that the level of the liquid is sufficient in each cell. If it is below the
recommended level, top up with de-ionized or distilled water.
Note: Under no circumstances should tap water be used.
The cell caps should not be replaced until charging is complete. This allows any gases formed during charging to
escape. It is inevitable that some minor escape of acid will occur during charging.
For permanently sealed batteries, it is not necessary to carry out the above checks.
2. Connection
Warning! The crocodile clamps must be connected to the battery poles in the following order:
- Connect the positive charging lead (red) to the positive terminal post of the battery (marked P or +).
- Connect the negative charging lead (black) to the negative terminal post of the battery (marked N or -).
Note: It is important to ensure that both crocodile clamps are making good contact with their respective terminal
posts.
Then connect the charger to the mains supply. Once the charger is connected to the mains supply, it will sound a
tone for 0,5 seconds and the LEDs on the power panel will light for a short time.
Warning! Always disconnect the charger plug from the mains supply before connecting or disconnecting the
appliance to or from the battery.
3. Charging
When connected to power supply, the charger is working on 12 V slow charging stage by default. The orange LED of
stage 1 will illuminate and the charger is automatically detecting the battery. This is the standard charging mode.
When ”MODE” button is pressed, you can select the desired charging mode. The charger switches immediately into
the fast charging mode for gel batteries and leisure batteries.
