The term "vehicle battery" refers to the 12 Volt battery in your vehicle.
If the vehicle is not used for long periods
If you do not drive your vehicle for a period of several days or weeks, the power management will gradually shut off the on-board systems one by one, or reduce the amount of current they are using. This limits the amount of power consumed and helps to ensure reliable starting even after a long period ►Link. Certain convenience features, such as interior lighting or electric seat adjustment, may not be available. These functions will be restored when you switch on the ignition and start the engine.
Even though some systems are deactivated automatically, certain electrical equipment continues to draw current even when the ignition is off. If the vehicle is left standing for long periods, this can result in total battery discharge. If the vehicle battery is allowed to discharge completely, an internal chemical reaction damages the battery irreparably. To avoid this, the vehicle battery should be recharged at least once a month ►Link. Please contact a qualified workshop if you have any questions.
Winter conditions
Cold weather is very hard on the vehicle battery. The starting capacity may be reduced as a result. For this reason, you should have the vehicle battery checked by a qualified workshop before the start of winter.