CTEK M15 EU 40-192 Automatic Battery Charger 12V 15A for Lead-Acid and Lithium Batteries

Professional workshops and demanding vehicle owners rely on the CTEK M15 to charge and maintain large 12V lead-acid and lithium batteries. The charger delivers 15A to batteries from 28Ah to 300Ah (lead-acid) or 20Ah to 200Ah (LiFePO4), making it suitable for cars, motorhomes, boats, and agricultural machinery.

Key specifications

• Charger type: Automatic, multi-stage
• Battery compatibility: 12V lead-acid (WET, MF, Ca/Ca, AGM, GEL) and 12V lithium (LiFePO4)
• Output voltage: 12V
• Charging current: 15A
• Battery capacity range (lead-acid): 28–300Ah
• Battery capacity range (lithium): 20–200Ah
• Charging stages: 8-step (lead-acid), 7-step (lithium)
• Input voltage: 220–240V AC, 50–60Hz
• IP rating: IP44 (splash and dust proof)
• Operating temperature: -20°C to +50°C
• Safety features: Reverse polarity protection, short circuit protection, spark-free
• Special modes: RECOND (recondition), SUPPLY (power supply), LITHIUM (dedicated LiFePO4)
• Desulphation function: Yes (for lead-acid batteries)
• Temperature compensation: Yes
• Ripple: Max 4%
• Efficiency: 85%
• AC cable length: 1.5m
• DC cable length: 2.0m

Why choose it

The M15 combines high charging current with a fully automatic multi-step process that protects battery health. Dedicated modes for reconditioning deeply discharged lead-acid batteries and for charging LiFePO4 batteries make it versatile. The IP44 rating allows use in dusty or damp environments, and the spark-free design ensures safe connection even in confined spaces.

Ideal use cases

• Charging and maintaining large lead-acid batteries in cars, motorhomes, boats, and agricultural machinery
• Charging LiFePO4 lithium batteries in modern vehicles and off-grid systems
• Reconditioning sulphated lead-acid batteries to extend their service life
• Using as a stable 12V power supply for diagnostics or equipment testing

Good to know

The charger operates from a standard 220–240V mains supply and includes temperature compensation to adjust charging voltage based on ambient conditions. Cables are 1.5m (AC) and 2.0m (DC) for flexible placement.