The CTEK CS ONE Gen 2 is an 8A smart 12V charger and maintainer designed to be as simple as possible to use. Its polarity-free clamps connect to either terminal without worrying about positive and negative, and its APTO adaptive charging technology automatically detects the battery and adapts the charge to any 12V lead-acid or LiFePO4 lithium type, including WET, Ca/Ca, AGM, GEL, and EFB. Built-in Wi-Fi and Bluetooth connect to the CTEK app for remote monitoring, charge history, and control, and the charger includes RECOND, WAKE UP, and SUPPLY programs along with temperature compensation. It can be left safely connected for long-term maintenance charging. CTEK backs it with a 5-year warranty.
- Type: 8A smart 12V charger and maintainer
- Polarity-free clamps connect to either terminal
- APTO adaptive charging auto-detects and adapts to any 12V battery
- Battery types: WET, Ca/Ca, AGM, GEL, EFB, and LiFePO4
- Wi-Fi and Bluetooth app control, monitoring, and charge history
- RECOND, WAKE UP, and SUPPLY programs; temperature compensation
- Safe for long-term maintenance charging
- Warranty: 5 years
- Part number: CTEK40-704
FAQ
What makes the CS ONE Gen 2 easy to use?
Its polarity-free clamps connect to either terminal, and APTO adaptive charging automatically detects the battery and sets the right charge.
What batteries does it support?
Any 12V lead-acid or LiFePO4 lithium battery, including WET, Ca/Ca, AGM, GEL, and EFB types.
Does it have an app?
Yes. Built-in Wi-Fi and Bluetooth connect to the CTEK app for remote monitoring, control, and charge history.
Can I leave it connected long term?
Yes. It is safe for long-term maintenance charging and includes RECOND, WAKE UP, and SUPPLY programs.
