User Manual for CTEK PRO25 CIC Battery Charger

Quick Guide from the Manual

The CTEK PRO25 CIC is a fully automatic battery charger designed for 12V lead-acid and lithium batteries. To begin charging, connect the charger to the battery terminals (red to positive, black to negative), then plug the power cable into a wall outlet. Use the MODE button to select the appropriate charging program. The charger will automatically detect the battery type and manage the charging process.

Charging Instructions

For batteries installed in a vehicle:

1. Connect the charger according to the vehicle's manual.
2. Connect the charger to the wall outlet.
3. Disconnect the charger from the wall outlet before disconnecting from the battery.
4. Always disconnect the black clamp before the red clamp.

For batteries outside the vehicle:

1. Connect the red clamp to the positive (+) terminal.
2. Connect the black clamp to the negative (-) terminal.
3. Connect the charger to the wall outlet.

Charging Modes

Press the MODE button to cycle through the available programs. The charger will remember the selected mode for the next time it is connected.

• NORMAL: For standard lead-acid batteries (14.4V / 25A).
• RECOND: For restoring energy in deeply discharged wet/Ca/Ca batteries (15.8V / 1.5A). Recommended once a year.
• SUPPLY: Provides a 12V power source or float maintenance (13.6V / 25A). Spark protection is disabled in this mode.
• LITHIUM: For lithium batteries (LiFePO4, Li-Fe, Li-iron, LFP) (13.8V / 25A).

Lithium Battery Undervoltage Protection (UVP)

Some lithium batteries have built-in UVP that disconnects the battery if it is deeply discharged, preventing the charger from detecting it. If the charger fails to start, use the manual wake-up feature: press and hold the MODE button for approximately 10 seconds. The LED will blink during the wake-up period until the charging program starts.

Troubleshooting & LED Indicators

Warning Light: If the warning light is on, check the following:

• Ensure the red clamp is connected to the positive terminal.
• Verify the battery is a 12V battery.
• Check for short-circuited clamps.
• If the process is interrupted, restart the charger using the MODE button. If it continues to fail, the battery may be sulfated, non-rechargeable, or unable to hold a charge.

Power Light:

• Fast Light: Charger is connected to the wall outlet.
• Blinking Light: Charger is in energy-save mode. This occurs if the charger is not connected to a battery within 2 minutes or if the battery voltage is below 2V. Check clamp connections and the inline fuse.

Technical Specifications

The charger is rated IP44 and operates in temperatures from -20°C to +50°C. It is compatible with 12V batteries (WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO4). Lead-acid capacity: 40–500Ah. Lithium capacity: 30–450Ah.