CTEK CS One (Gen 2) Adaptive Battery Charger - 12 V - 8 A

CTEK CS ONE Gen 2 – Intelligent Battery Charger with App Control

The CTEK CS ONE Gen 2 is an advanced battery charger that makes charging and maintaining 12V batteries both easier and smarter. With CTEK’s APTO™ technology, the charger automatically detects the battery’s type, size, and condition, then adjusts the charging process to the battery’s needs. This means you don’t have to select a charging program or settings yourself when charging the battery.

One of the major advantages of the CTEK CS ONE Gen 2 is its polarity-reversible clamps. They can be connected to either battery terminal without the risk of reverse polarity, making the battery charger extremely user-friendly. It supports a wide range of 12 V batteries, including traditional lead-acid batteries, AGM, EFB, GEL, Ca/Ca, and LiFePO₄, and can be used with batteries with a capacity ranging from 3 to 180 Ah.

The Gen 2 version features both Wi-Fi and Bluetooth, allowing the CTEK App to provide additional functions and charging information. Through the app, you gain access to features such as RECOND, WAKE UP, and SUPPLY, as well as detailed charging history, charging monitoring, and the option to set reminders. For example, WAKE UP can be used for deeply discharged lead-acid batteries or lithium batteries with undervoltage protection, while the SUPPLY function can support the vehicle’s electrical system during service or battery replacement.

The CTEK CS ONE Gen 2 also functions as a smart maintenance charger and can therefore be left connected for extended periods. Automatic temperature compensation helps adapt the charging process to the ambient conditions, making it suitable for both daily battery care and long-term maintenance. With IP65 protection and a 5-year warranty, you get a modern 12 V battery charger that combines simple operation with advanced battery care.

Key Specifications

Input voltage: 220–240 V AC, 50–60 Hz, 1.2 A
Output: 12 V, 8.0 A
Battery capacity: 3–180 Ah
Start voltage: 1.8 V
Wi-Fi: 2.4 GHz
Bluetooth: Bluetooth LE 5.1
Protection class: IP65
Dimensions: 235 x 88 x 52 mm
Net weight: 0.675 kg
Cable length: 1.4 m
Warranty: 5 years