CTEK ONE 40-330 Automatic 12V Battery Charger with Bluetooth

For vehicle owners who need a dependable charger that works with both traditional lead-acid and modern lithium batteries, the CTEK ONE 40-330 offers automatic 12V charging in a compact, weather-resistant unit. Connect it to your car, motorcycle, or boat battery, select the mode via the CTEK app, and let the smart multi-stage process handle the rest.

Key specifications

• Output voltage: 12 V
• Max charging current: 5 A
• Battery capacity (charge): 1.2 - 110 Ah
• Battery capacity (maintenance): 1.2 - 160 Ah
• Supported battery types: 12V Lead-Acid (WET, MF, Ca/Ca, AGM, GEL), LiFePO4
• Charger type: Automatic Multi-Stage Smart Charger
• Charging stages (Lead-Acid): 8 steps
• Charging stages (LiFePO4): 7 steps
• Input voltage: 220-240 V AC, 50-60 Hz
• IP rating: IP65
• Operating temperature: -20°C to +50°C
• Safety features: Reverse Polarity Protection, Short-Circuit Proof, Spark-Free
• Connectivity: Bluetooth (CTEK App)
• AC cable length: 1.4 m
• DC cable length: 1.5 m
• Temperature compensation: Yes
• Recondition mode: Yes (for Lead-Acid)
• Desulphation mode: Yes (for Lead-Acid)

Why choose it

The CTEK ONE adapts to your battery type automatically, preventing overcharging and extending battery life. Its IP65 rating means you can use it outdoors without worry, and Bluetooth connectivity lets you monitor charging status from your phone.

Ideal use cases

• Maintaining car batteries during winter storage
• Charging motorcycle or powersport batteries
• Reviving deeply discharged lead-acid batteries with reconditioning
• Charging LiFePO4 batteries in RVs or boats

Good to know

The charger includes reverse polarity protection and is spark-free, making it safe to connect even in confined spaces. The CTEK app provides real-time charging data and battery health insights.