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You will read many opinions about maintaining the charge of the 12V battery. I offer mine: After much research and after confirming that the large drive battery does not tend the 12V battery when the car is turned off, I purchased a trickle charger for the 12V battery and connect it to the car...

These are the facts I have learned about the 12-volt battery: The 12-volt battery is lithium-ion. It does not interface with the larger battery that drives the car; in other words, the larger battery does not charge the 12-volt battery under any circumstances. The 12-volt battery loses 1 1/2...

Pertaining to your pen, you wrote, "Interestingly, you can't use it for writing. There's no ink in it." There probably is ink in the pen. Did you check its battery? If it is low, I recommend a CTEK PEN US Battery Tender.

Thank you, everyone, for the information about using a CTEK MSX 50 to maintain the 12-volt battery in my Taycan 4S. This is what I now understand: A CTEK MSX 5.0 battery tender is not suitable for the 12-volt ion battery in the Taycan. A CTEK Lithium US battery tender must be used. The...

I plugged a CTEK MXS 5.0 battery tender into the 12 volt outlet in the console of my 2021 Taycan 4S. The power lamp on the CTEK indicated that it was not connected and therefore not charging. I then plugged the CTEK into the 12 volt outlet in the trunk of the car. Again, the power lamp on...