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Regular Price: $314.99 - Instant discount: $15.00 = $299.99
The CTEK CS ONE (Gen 2) NA is an intelligent 12V battery charger designed for enthusiasts and vehicle owners who want simple, automatic battery maintenance without having to manually select the battery type or charging program.
Featuring CTEK's APTO™ adaptive charging technology, the CS ONE automatically identifies the connected 12V battery and adapts the charging process to its condition and requirements. Its polarity-free clamps make connection simple and safe because they can be connected to either charging point.
The Gen 2 model adds Wi-Fi and Bluetooth connectivity, allowing the CTEK App to provide additional charging controls, battery insights, charging history, notifications, and advanced functions.
| Specification | Details |
|---|---|
| Brand | CTEK |
| Model | CS ONE (Gen 2) NA |
| Part Number | 40-704 |
| Charger Type | Intelligent 12V Battery Charger |
| Input | 110–120 VAC, 60 Hz, 1.8A |
| Output | 12V, 8.0A |
| Battery Voltage | 12V |
| Battery Capacity | 3–180Ah |
| Battery Chemistry | Lead Acid / Lithium-Ion |
| Compatible Batteries | WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO₄ |
| Minimum Start Voltage | 1.8V |
| Connectivity | Wi-Fi 2.4GHz / Bluetooth LE 5.1 |
| App | CTEK App – Android & iOS |
| Protection Rating | IP65 |
| Cooling | Natural Convection |
| Temperature Range | -22°F to +122°F (-30°C to +50°C) |
| Temperature Compensation | Built In |
| Ripple | Less Than 4% |
| Back Current Drain | Less Than 1.5Ah/Month |
| Warranty | 5 Years |
The CS ONE's APTO™ technology takes the guesswork out of battery charging. Instead of requiring the user to manually select a charging program, the charger automatically determines the appropriate charging strategy for the connected 12V battery.
This makes the CS ONE particularly convenient for enthusiasts who maintain multiple vehicles with different battery types.
The CS ONE features CTEK's polarity-free charging clamps. The clamps can be connected to either charging point without having to determine which clamp goes where first, simplifying the connection process.
The Gen 2 CS ONE connects to the CTEK App through Wi-Fi and Bluetooth. The app provides access to additional functions and charging information, including:
WAKE UP: Helps recover deeply discharged lead-acid batteries and lithium batteries that have entered under-voltage protection.
RECOND: Provides a dedicated reconditioning program for compatible lead-acid batteries.
SUPPLY: Provides a stable power source to help maintain vehicle electrical power during service work or battery replacement/removal.
The CS ONE can remain safely connected to a battery for extended maintenance charging. This makes it useful for vehicles that are stored seasonally, garage-kept performance cars, collector vehicles, motorcycles, or any vehicle that isn't driven regularly.
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