Does the powerbank charge as soon as you plug it in or is there a switch?
I would like to use it as a buffer for the cool box in the car. Because when the engine is not running, the 12v socket does not supply any power.

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The power bank starts charging as soon as a device is connected. There is no separate switch to activate or deactivate charging. If you want to use the power bank as a buffer for the cool box in the car, it might be useful to only connect it when the engine is running to avoid unnecessary discharge.

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Question about Digitec Powerbank

Does the powerbank charge as soon as you plug it in or is there a switch? I would like to use it as a buffer for the cool box in the car. Because when the engine is not running, the 12v socket does not supply any power.