If you drive the car every day you should not have a problem. If you let the car sit for a couple of weeks without being driven you will have a problem. There are computers in the car that are never turned off that will eventually discharge the battery. The only way to completely turn the car off is to disconnect the 12 volt battery.
I'll be leaving my car outside for 18 days from the last full charge of the 12V battery. I really don't want to incur any damage to my 6-month old 12V battery.
The manual says:
"If storing your vehicle for more than 30 days without recharging the battery, we recommend that you disconnect the battery cables to maintain battery charge for quick starting.
Note: It is necessary to reset memory features if you disconnect the battery cables."
If I disconnect the battery cables, I'm wondering:
1. Is Ford's "30 days" too long, such that my 12V battery will flake and be damaged? It seems Ford under-engineered the 12V battery management, so I'm not sure I should trust their estimate here. Any opinions of whether I should instead disconnect the battery cables for the 18-day duration?
2. Will the memory features that are reset include the odometers/trip meters?
3. Do I need to disconnect both cables like they say?
4. The manual states further:
"Disconnect the 12V battery. If your 12V battery is located in the luggage compartment, do not fully shut the luggage compartment after disconnecting the 12V battery. Only leave the luggage compartment open if your vehicle is stored in a locked location."
What is this about, and should I open the trunk pass-through to achieve some additional venting? Or even slightly crack open a window too?
Edited by jj2me, 15 April 2018 - 08:03 AM.