How to Unlock a Car When the Battery is Dead?

1 Answers
AshleyRose
07/29/25 10:54pm
When the car battery is dead, you can use the mechanical key to unlock the car. Here are the specific reasons for a dead battery: 1. Natural discharge: Even when the car battery is not connected to any electrical components or under any load, it loses about 1% of its charge daily. This is the self-discharge rate of the car battery. The self-discharge rate is directly related to the quality of the battery. The better the battery, the purer the electrolyte, and the lower the self-discharge rate. 2. Unclosed vehicle electrical appliances: The usual cause of a dead car battery is not turning off the vehicle's electrical appliances after parking. Some cases are due to alternator or battery failure. If the vehicle is parked for a long time, it is recommended to disconnect the negative terminal of the battery to prevent it from draining completely.
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