Question about Ctek D250SE Lithium DC/DC Converter 12V

The CTEK D250SE battery charger is designed to maintain and service batteries over an extended period of time, even during the winter.

- The device has a low back current drain of less than 1 Ah per month, which means that it draws very little energy from the battery when it is not connected to the main power supply.
- It has a maintenance charging function that ensures the battery is kept at an optimum state of charge by sending regular 3-second pulses to the battery.
- The device can also divert the charge from the car battery to the starter battery when the car battery is fully charged to ensure that both batteries remain in good condition.

Through these functions, the CTEK D250SE can effectively maintain a car battery over the winter and ensure it is ready when it is needed again.