Customer support

FAQ

Welcome to CTEK and thank you for being a valued customer.

We are here to help and in this section you will find FAQs, troubleshooting, warranty information and video tutorials. If you can’t find what you are looking for, please contact us.

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Top 10 FAQ

  • D250SE: Can I use D250SE for lithium batteries?
    See answer

    Yes it works both with lead-acid and lithium (12V LiFePO₄) batteries.

  • D250SA: Can I use D250SA for lithium batteries?
    See answer

    No, it works only with lead acid batteries.

  • CT5 START/STOP: What do the three stages on the charger mean?
    See answer

    Check mode means that the charger is checking the battery’s state of health and preparing to charge. If the battery is in good condition, the Check stage doesn't take more than a few moments.
    The Charge mode LED shows while the charger is filling the battery, and Care shows when the battery is fully charged and the charger has automatically switched over to maintenance charging.

  • Batteries: Can I charge Lithium batteries with a regular CTEK charger and vice versa?
    See answer

    No. Lithium batteries needs a different charge than lead/acid batteries. Due to severe risks if overcharging, we do not recommend using a CTEK charger that is developed for lead/acid batteries, for that purpose.
    Charging lead/acid batteries with a Lithium charger does not give the best result and cannot be recommended.

  • PRO BATTERY TESTER: What does the PRO BATTERY TESTER tester do?
    See answer

    It measures State of health of the battery, and can also test starter motor and alternator function.

  • PRO BATTERY TESTER: What batteries can be tested with a PRO BATTERY TESTER?
    See answer

    You can test 12V lead/acid starter batteries between 100 and 900 CCA.

  • PRO60: Are the clamps better on this one than the 70/50?
    See answer

    The clamps are the same as the 70/50.

  • PRO60: Why does it have different charging modes available when it has adaptive charging?
    See answer

    The PRO60 can assess the battery size not the technology.

  • CTX BATTERY SENSE: Why doesn't the panel with a figure disappear from the Battery Sense icon?
    See answer

    The panel (iPhone) shows how many senders have yellow or red status or haven't been updated in the last seven days. The panel will disappear when the app has updated and/or the state of charge has changed to green.

  • CTX BATTERY SENSE: Why can't I find the app on App Store? I have an iPhone
    See answer

    If you have an iPhone that doesn't support iOS 7 or higher, the app won't be shown on App Store.

  • Can I use a SMARTPASS without a D250S DUAL?

    Yes you can. If you do not need a charging function to the service battery, SMARTPASS can be a good solution to provide the service battery with current, especially if you use the service battery while charging (fridge, microwave oven etc.).

  • D250SA: Can I use D250SA for lithium batteries?

    No, it works only with lead acid batteries.

  • D250SE: Can I use D250SE for lithium batteries?

    Yes it works both with lead-acid and lithium (12V LiFePO₄) batteries.

  • SMARTPASS 120: Can the starter battery and the service battery be different types of battery?

    Yes, (lead acid)

  • SMARTPASS 120S: Can the starter battery and the service battery be different types of battery?

    Yes.

  • CTEK MONITOR
    Can the CTEK MONITOR monitor my engine starting battery as well as my service battery?

    No, it cannot. The service battery is in continuous use, and so needs continuous monitoring. The starter battery, however, is subject only to periodic heavy loads followed by float charging, and so does not need to be monitored.

  • CTEK MONITOR
    Do I need to disconnect my CTEK MONITOR when I leave the vehicle for long periods?

    No. The CTEK MONITOR is designed to be permanently connected to the battery. It is independently fused, and draws only 1.5mA from the battery. At such a low current, it would take several years to discharge a typical fully-charged service battery.

  • CTEK MONITOR
    I have a 500W appliance. How do I know what current it will draw?

    Divide the power rating by the nominal supply voltage to find the current. So, for example, your 500W appliance will draw 500W/12V Amps from a nominal 12V battery: i.e. about 42Amps

  • CTEK MONITOR
    I have another voltmeter on my vehicle which shows a different value to the CTEK MONITOR indication.

    The CTEK MONITOR very accurately measures the voltage directly across the battery terminals. Other voltmeters may read differently owing to volt drops in the wiring.

  • CTEK MONITOR
    My battery is made up of a bank of several batteries. Is that a problem?

    Not as long as the combination produces a nominal 12 volts, and all the current drawn from the bank passes through the shunt.