CTEK CS ONE (Gen 2) Battery Charger

The CTEK CS ONE (Gen 2) Battery Charger is used for charging, maintaining and restoring 12V vehicle batteries, including lithium (LiFePO), AGM, EFB, and standard lead-acid types. It s built around APTO adaptive charging technology, which automatically assesses your battery s chemistry, size, and state of health, then applies the correct charging programme without any input from you, reducing the risk of user error and improving charging efficiency.Explore the key technical features and the benefits they provide:APTO Adaptive Charging Technology: This feature automatically detects the battery type, condition, and capacity, then delivers a customised charge cycle based on that data, which helps prevent overcharging or undercharging.Polarity Free Clamps: These clamps eliminate the risk of reverse polarity connection by allowing you to attach them to either terminal without concern, making setup faster and reducing errors during connection which improves safety and ease of use in all charging situations.Wi-Fi and Bluetooth Connectivity: Integrated wireless communication connects to the CTEK App via Bluetooth LE 5.1 and Wi-Fi (2.4 GHz), allowing you to access advanced functions like WAKE UP, RECOND, SUPPLY modes, and charge session tracking so you can fine-tune charging behaviour and monitor battery health in real time from your smartphone.Automatic Temperature Compensation: Built-in sensors adjust the charge voltage automatically based on the ambient temperature from -30°C to +50°C, protecting the battery from damage during extreme conditions.Maintenance Charging Functionality: Designed for long term use with a back current drain of less than 1.5 Ah/month, it can remain connected indefinitely without overcharging, helping to preserve battery condition and extend lifespan.RECOND Programme: This dedicated function restores and reconditions deeply discharged lead acid batteries by applying a controlled overcharge phase, helping to recover lost capacity and improve overall battery performance.WAKE UP Mode: Automatically activates and begins charging lithium batteries with undervoltage protection or lead-acid batteries that have been deeply discharged, removing the need for manual intervention when a battery appears dead .SUPPLY Mode: Maintains a stable 12V output to support the battery during service work or battery changes, helping you avoid memory loss or reprogramming requirements by keeping the vehicle s systems powered during battery disconnection.Custom Notifications and Charging Reminders: Through the app, you can set reminders for routine charging and receive automatic alerts on charge status, errors, or updates, making it easier to stay on top of battery care without constant checking.Low Ripple Charging Output: With less than 4% current and voltage ripple, the charger protects sensitive vehicle electronics during charging, reducing the risk of electrical issues and component wear during routine use.Compact and Durable Design: Housed in an IP65-rated enclosure with a 2-metre detachable output cable and natural convection cooling, it offers durability in demanding conditions and ease of use around vehicles and workspaces.The CS ONE (Gen 2) helps you carry out safe, adaptive charging for a wide range of batteries, with no need for manual settings or specialised knowledge. Whether you re maintaining seasonal vehicles, supporting service work, or improving long-term battery reliability, it offers a practical and automated solution that reduces hassle and minimises battery-related problems. It s a smart addition to your workshop or garage setup, giving you a high level of control and dependable results in routine maintenance and more involved battery management tasks.The CS ONE features a 5 year manufacturers warranty.CTEK CS ONE Product Information Sheet