The CTEK PRO25S is a professional-grade 25A 12V battery charger, maintainer, and power supply built for the workshop. Its fast, fully automatic 8-step charging cycle handles lead-acid batteries from 40 to 500Ah and LiFePO4 lithium from 30 to 450Ah, supporting WET, MF, Ca/Ca, AGM, EFB, GEL, and LiFePO4 types, charging lead-acid at 14.4/15.8/13.6V and lithium at 13.8/14.4/13.3V. A dedicated power supply mode delivers up to 25A at 13.6V for code reading, circuit testing, and fault finding without draining the battery, and the charger adds a RECOND mode for deeply discharged lead-acid batteries, a lithium wake-up mode, automatic parallel load compensation, and temperature compensation from -20 to +50C. It is rated IP44.
- Type: professional 25A charger, maintainer, and power supply
- Fully automatic 8-step charging
- Charges lead-acid 40-500Ah and LiFePO4 30-450Ah
- Battery types: WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO4
- Power supply mode: up to 25A at 13.6V for diagnostics
- RECOND mode, lithium wake-up, automatic parallel load compensation
- Temperature compensation -20 to +50C, IP44
- Part number: CTEK40-328
FAQ
What is the CTEK PRO25S for?
It is a professional 25A 12V charger, maintainer, and power supply for busy workshops, charging lead-acid 40-500Ah and LiFePO4 30-450Ah.
Can it act as a power supply?
Yes. Its power supply mode delivers up to 25A at 13.6V for code reading, circuit testing, and fault finding without draining the battery.
Does it charge lithium batteries?
Yes. It has selectable lithium and lead-acid modes, including a lithium wake-up mode for batteries in undervoltage protection.
Does it compensate for temperature?
Yes. It uses temperature compensation from -20 to +50C and is rated IP44.
