Up to 5 year warranty
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CS ONE (Gen 2) is our most versatile charger, compatible with virtually all 12V batteries across cars, motorcycles, boats, campers, and more. It automatically adapts for optimal safety and performance—making it the safest choice when you’re unsure.
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The CTEK PRO 1240 is a high-output, fully autonomous 12V battery charger designed for professional use. Featuring MODESHIFT™ technology, it automatically detects battery size, chemistry, and condition to deliver optimal charging or power supply—no buttons or settings required. Encased in an IP64-rated rugged housing, it is built to resist dust, moisture, and harsh conditions. The fanless cooling system ensures quiet and efficient operation, ideal for showrooms and high-demand areas. Seamlessly switching between charge and supply modes, the PRO 1240 is perfect for diagnostics, programming, and flashing tasks.
;*;MODESHIFT™ auto-selects battery type, size and charge mode;*;Zero setup – just connect and charge or supply power;*;IP64-rated flat design for under-vehicle or bench use;*;Fanless cooling for quiet, efficient operation;*;Auto-switch between charge and power supply;*;Ideal for diagnostics, flashing and programming;*;Anderson, RJ45 and RS485 connectivity options;*;Built for showrooms, workshops and garages;*;StartFragmentSafe for all 12V lead-acid and lithium batteries and battery systemsEndFragment;*;Swedish quality – trusted by leading OEMs worldwide
| Input | 220–240 VAC, 50–60 Hz, 7.0 A |
|---|---|
| Output | 14.4 V,40 A |
| Battery types | 12 V:,WET,can be customized for AGM,GEL,LiFePO₄ |
| Battery chemistry | Lead acid,Lithium-ion |
| Start voltage | 0.5 V |
| Battery voltage | 12 V |
| Battery capacity | 80–1100 Ah |
| Degree of protection | IP64 |
| Dimensions | 293 mm x 236 mm x 80 mm mm |
| Warranty | 2 years |
| Warranty information | CTEK issues a limited warranty to the original purchaser of the product. Depending on the product, the limited warranty period will vary. The limited warranty is not transferable. The warranty applies to manufacturing faults and material defects. The warranty is void if the product has been handled carelessly or repaired by anyone other than CTEK or its authorized representatives. CTEK makes no warranty other than this limited warranty and is not liable for any other costs other than those mentioned above, i.e. no consequential damages. Moreover, CTEK is not obligated to any other warranty other than this warranty. |
Fully automatic/autonomous operation (with MODESHIFT™ Technology)
Showroom & Workshop Ready
Silent Fanless Cooling
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Robust, reliable, and fully autonomous – the CTEK PRO 1240 delivers unrivaled battery charging for workshops, showrooms, and garages.
Specifications
Battery Voltage
12 V
Battery Capacity
80–1100 Ah
Battery Chemistry
Lead acid,Lithium-ion
Battery types
12 V:,WET,can be customized for AGM,GEL,LiFePO₄
Warranty
2 years
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