The CTEK US 0.8 is a fully automatic 6-step battery charger and maintainer for small 12V lead-acid batteries, delivering 0.8A at 14.4 volts. It charges batteries from 1.2 to 32Ah and maintains batteries up to 100Ah, which makes it ideal for motorcycles, jet skis, snowmobiles, ATVs, and lawnmowers, as well as long-term maintenance of a standard car battery. Its compact output includes patented desulphation and a patented maintenance charge that keeps a battery topped up without overcharging, and it is designed to protect sensitive vehicle electronics. The charger is non-sparking, reverse-polarity protected, short-circuit proof, and rated IP65. CTEK backs it with a 5-year warranty.
- Type: fully automatic 6-step charger and maintainer
- Output: 0.8A at 14.4V, 12V
- Charges: 1.2-32Ah; maintains up to 100Ah
- Battery types: WET, MF, Ca/Ca, AGM, GEL
- Patented desulphation and maintenance charge
- Designed to protect vehicle electronics
- Non-sparking, reverse-polarity protected, short-circuit proof, IP65
- Warranty: 5 years
- Part number: CTEK56-865
FAQ
What is the CTEK US 0.8 best for?
Small 12V batteries from 1.2 to 32Ah, such as motorcycles, jet skis, snowmobiles, ATVs, and lawnmowers. It also maintains a standard car battery, up to 100Ah.
How many charging steps does it use?
It uses a fully automatic 6-step charging and maintenance process with patented desulphation.
Can I leave it connected over winter?
Yes. Its patented maintenance charge keeps the battery topped up without overcharging, so it is safe for long-term storage.
Is it safe for vehicle electronics?
Yes. It is designed to protect vehicle electronics and is non-sparking, reverse-polarity protected, and short-circuit proof.

