What is the reason for the Volkswagen Lavida's battery running out after being parked for 3 days?

[OCali]

According to the capacity of a car battery, it is abnormal for the vehicle to run out of power after being parked for 3 days. Possible reasons include poor battery quality leading to insufficient stored power or leakage, or unswitched-off electrical appliances after the vehicle is locked. A car battery, also known as a storage battery, is a type of battery that works by converting chemical energy into electrical energy. The battery of a Volkswagen Lavida typically needs replacement every 3 to 5 years. Under normal conditions where the vehicle's alternator charges properly and there are no electrical leakages or grounding issues, the Lavida's battery can generally last for more than 3 years. The Lavida is a compact sedan under the Volkswagen brand, with body dimensions of 4670 mm in length, 1806 mm in width, and 1474 mm in height, and a wheelbase of 2688 mm. Here are some relevant details: If the battery runs out after the vehicle has been parked for 3 days, you will need to jump-start the vehicle. Drive the car to a repair shop, where the battery can be charged first. Once the battery is fully charged, use a battery tester to measure its capacity and compare it with the original battery capacity marked on the vehicle to see the difference. A significant difference indicates that the battery has aged, and insufficient capacity can cause the battery to run out after just 3 days of parking. If the capacity is sufficient, measure the vehicle's discharge current using an ammeter. Normally, for vehicles with fewer control modules, the discharge current should be between 12-20 milliamperes. For vehicles with more control modules, the discharge current should not exceed 55 milliamperes. An abnormal discharge current indicates that there is a component in the vehicle causing a discharge, leading to the battery running out after 3 days. The issue can be resolved by identifying and fixing the source of the leakage. Battery maintenance tips for the Lavida include: Avoid parking the car in open parking areas for extended periods; In winter, when the engine is harder to start, each attempt to start the car should not exceed 5 seconds, with a minimum interval of 15 seconds between attempts; Clean the battery terminals periodically.