Usually, a large number of energy consumers-air-conditioners, magnets, headlamps powered by an engine that is not running. If none of this is included, the problem should be found in the following:
-Power drain in the battery. This can happen when one of the customers is connected incorrectly-in this case, it can consume energy even when it is off. Such a system, which it is impossible to imagine on the foreign cars, unfortunately, is found in the cars of the VAZ.
-Weak battery. The old or worn battery is another obvious reason for the rapid discharge of the ACB. Typically, the life of the battery is 3-5 years, and it is better to replace it with a new life.
-The cells of the battery and the wires going to it. Over time, they can oxidiate and partly destroy.
-Defective generator. The battery can also sit because the generator does not provide it with the required charge. In that case, you should diagnose the generator.