Customer support


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.

  • CTX BATTERY SENSE: Battery Sense Software update

    12th July Issues have been reported with the latest update on our Battery sense app – our developers are currently working hard to rectify the issue. In the mean time we have taken the decision to roll back to the previous version of the app, We have been assured this will happen over the next few days - iOS first then Android to follow.

  • CONNECT CIG PLUG: Can I use your CONNECT CIG PLUG to charge the battery through the cigarette socket in my car?

    Yes, but you should check that you have voltage to the socket even if the vehicle is switched off. If, for example, you can charge a mobile phone or get a GPS to work when the car ignition is switched off, you can also charge the car battery this way.

  • INDICATOR EYELET M8, INDICATOR PANEL 3.3M, INDICATOR EYELET M6, INDICATOR CLAMP, INDICATOR CIG PLUG, INDICATOR PANEL 1.5M: I have a INDICATOR connected to the battery all the time. Is there any risk of the battery discharging?

    No, the purpose of the indicator is to allow you to quickly and easily see whether the battery must be charged, thereby reducing the risk of the battery being damaged because of being discharged. The INDICATOR uses about 1.5mA. Than gives 1,5 Ah /month. An average self-discharge for a battery is approx. 10 Ah/month.

  • INDICATOR EYELET M8, INDICATOR PANEL 3.3M, INDICATOR EYELET M6, INDICATOR CLAMP, INDICATOR CIG PLUG, CTX INDICATOR PLUG 12V, CTX INDICATOR EYELET M8, INDICATOR PANEL 1.5M: I have a INDICATOR connected to the battery in my car. The red lamp flashes even after I've fully charged the battery. Should it do this? I thought the INDICATOR would be green when the battery is fully charged?

    The CTEK INDICATOR is exactly what the name says – an indicator. It provides a snapshot of the system voltage level and works best when the battery has reached a rest level (this can take up to a few hours to reach after the battery was used). As soon as you open a car door or turn on the ignition, the battery voltage vill temporarly drop and the indicator shows yellow or even red. To make things easier, you can position the INDICATOR where you can see it without having to unlock or use any voltage in the car.


    INDICATOR always flashes. It is to save battery power, as flashing draws less current tha a steady light.