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.
For customer support topics press the arrow above.
No - CTEK recommend the correct charge mode be used at all times.
The D250SE has a wiring harness with a black and a red wire, the black wire must be connected to battery positive (12V) to change the charging algorithm for Lithium (12V LiFePO₄) batteries.
Yes it works both with lead-acid and lithium (12V LiFePO₄) batteries.
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.
If you can't change the charging mode by pressing the mode button regardless of which battery you are trying to charge, the charger is probably faulty. If you still have the warranty, I recommend you go to your dealer with the charger, the receipt and a completed warranty claim form.
TIME TO GO has a different display. Instead of the various charging steps, you see a display that counts down the time left until the battery can be used.
Yes, you can, if you have a 12 V lead-acid battery. Note that TIME TO GO is optimized for batteries of 20 Ah upwards, so if your battery has a lower capacity than 20 Ah you should use a different charger, such as an MXS 3.8.
I1225 is equipped with M10 ring terminals instead of clamps.
Yes, it will charge all types of LFP / LiFePO4 Lithium Batteries when the Lithium programme is selected.
Double tap, scroll and/or pinch zoom in both graphs.