Owners of modern cars were reminded that simply disconnecting the battery can completely block the car's electronics and require complex recovery through a branded service. This threat was reported by the "Behind the Wheel" publication.
In cars of the 1990s, disconnecting the battery was routine - at most, the clock would be reset. In modern cars, a power interruption is perceived as an unauthorized intervention, which causes the on-board systems to reset settings and may go into protective lock.
European, American, Japanese, Korean and Chinese premium models are especially sensitive: the computer is sometimes blocked so much that recovery is only possible through branded services with connection to the manufacturers' servers. For a number of brands, such connections are no longer available, and owners are forced to turn to Russian programmers.
Before disconnecting the battery, experts advise connecting a temporary source to the on-board network - at least an assembly of three lithium-ion 18650 elements. This will save power and avoid loss of settings.
For details of the behavior of a particular model, it is recommended to contact specialized forums.
