Ford F-150 Lightning battery completely dead and unable to charge at dealer for three days on Ford F-150 Lightning

Some Ford F-150 Lightning owners report experiencing issues with a completely dead 12-volt battery, which can lead to random software and electrical problems. These issues arise because the 12-volt battery, located in the frunk, is essential for powering the truck's electronics and computer systems. When the 12-volt battery is dead, it prevents the contacts from closing and recharging it from the high-voltage battery, resulting in dashboard errors, software glitches, and failed over-the-air updates. Owners are advised to return the vehicle to the dealer and may need to use a loaner F-150 while the problem is being resolved. Additionally, some owners express concerns about potential issues with the DC-DC converter if a non-OEM battery is used, particularly in a new vehicle like the Ford F-150 Lightning. It is crucial for owners to ensure the 12-volt battery is functioning properly and that any related charging system issues are addressed promptly to avoid further complications.