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[Common, Battery]

Battery voltage before starting

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Edit Date: Oct. 21, 2021, 10:28 a.m.

While driving, alternator charges the battery. Measure the battery voltage before starting the car. Ensure the voltage is at least 12.45V. This applies to 12V battery only.

Ensure to avoid battery electricity short.
Battery voltage before starting, None|bekomcar.com
  1. Before starting, set the digital multimeter (DMM) to 20 DCV.
  2. Connect the red probe of the DMM to the positive battery terminal and the black one to the negative terminal.
  3. Check if the measured value is 12.45V or higher. 12.45V is about 75% of a normal battery.

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Aug. 10, 2022, 5:06 p.m. - SunJoo Moon moderator  
배터리 단자 접속상태가 중요하다. 손으로 배터리 단자 코넥터를 흔들어서 흔들리면 조여주어야 한다. 위험하고 주행중 시동 꺼질수도 있다.
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