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At what voltage can a car battery not start?

1 Answers

SaraAnn

07/30/25 4:28am

Car battery voltage below 11V cannot start the engine. Precautions for using car batteries are: 1. Avoid parking the car in an open parking lot for a long time; 2. Avoid multiple uninterrupted starts; 3. Regularly check the accessories and connection lines on the battery; 4. Do not use car electrical appliances after the engine is turned off. Regarding battery maintenance: 1. Avoid parking the car in an open parking lot for extended periods. If long-term parking is necessary, remove the battery to prevent freezing damage. 2. Car engines are harder to start in winter. Each start attempt should not exceed 5 seconds, with intervals of at least 15 seconds between attempts. If the engine fails to start after multiple attempts, check other aspects such as the circuit, ignition coil, or fuel system. Avoid multiple uninterrupted starts, as this can cause the battery to over-discharge and burn out. 3. Car batteries need regular charging. A battery left unused will gradually discharge on its own until it becomes unusable, so start the car periodically to recharge the battery. 4. Clean the battery terminals regularly and apply special grease to protect the wiring harness. Frequently inspect the battery accessories and connection lines. 5. Do not use car electrical appliances after the engine is turned off. Using the battery alone when the engine is not generating electricity can cause damage.

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