Normal Car Battery Voltage When Off

Normal Car Battery Voltage When Off. The ideal car battery voltage with the engine running is between 13.7 and 14.7v. If the battery isn’t fully charged, it will diminish to 12.4v at 75%, 12v when it’s only operating at 25%, and down to 11.9v when it’s completely discharged.

My car battery makes a bubbling noise after I turn the car from www.quora.com

Before starting up engine 8.9v: The units & the factors. When that happens, sulfation begins to diminish both capacity and performance.

Source: www.quora.com

1.124 means you have a dead battery. However, if the voltage drops to around 10.5v, the lead plates are likely almost entirely covered by lead sulfate.

Source: www.techtodayinfo.com

A fully charged car battery voltage should be 12.6v or above, this is with the engine off. With the engine off, you should get a reading of 12.6 volts.

Source: carfromjapan.com

, bs electrical engineering (1986) answered 1 year ago · author has 294 answers and 145k answer views. That is why the car manufacturers provide bigger amps in the car battery than it needs to start.

Source: www.quora.com

That is why the car manufacturers provide bigger amps in the car battery than it needs to start. When a battery is completely charged, its voltage should be at 12.6 volts or above.

Source: decanet.net

At the time of exploitation, this parameter is between 13.7 to 14.7 volts. If the battery isn’t fully charged, it will diminish to 12.4v at 75%, 12v when it’s only operating at 25%, and down to 11.9v when it’s completely discharged.

A Specific Gravity Of 1.269 Means That The Battery Is Fully Charged.

, bs electrical engineering (1986) answered 1 year ago · author has 294 answers and 145k answer views. When that happens, sulfation begins to diminish both capacity and performance. I suspect you are getting 12.7 immediately after switching off the engine and it drops to 12.1 in the same time scale.

But If The Battery Reads Over 15 Volts Or Less Than 13 Volts, Then There Might Be A Problem With The Voltage Regulator, The Wiring Or The Alternator.

A fully charged car battery voltage should be 12.6v or above, this is with the engine off. If you want to check this theory, connect your meter while the engine is still running and leave it connected, then switch off and read. Generally, a car battery pulls approximately 400 amps for small vehicles to start and more than 1000 amps for the large ones.

However, If The Voltage Drops To Around 10.5V, The Lead Plates Are Likely Almost Entirely Covered By Lead Sulfate.

However, if the cold weather charging mode is chosen, then it increases the charging voltage to 14.7 v. The normal voltage needed to start the car begins from 12.6 volts. When the engine is running, this measurement should be 13.7 to 14.7 volts.

If Measured At This Point, The Battery Reading You Will Get Will Be Anywhere Between 13.5 To 14.7 Volts.

If you don’t have a multimeter to tell you the voltage of your battery, you can do a test of your electrical system by starting the car and turning on the headlights. A car battery is considered fully discharged at 11.9v. But this rule is applicable when the engine is turned off.

With Your Black Plug Touch The Positive Terminal Of The Car Battery Itself.

It should read close to 12.6 volts when the car is off. This is known as “parasitic draw”. A good battery should be between 12.4 to 12.6v at rest, it will drop some if any accesories are on (lights, radio, phone or gps chargers, flashers, etc) if you have an automotive voltage/amperage tester available, you can do a load test on the battery (hook it up and load it by 1/2 the cca rating of the battery for 15 seconds) if it drops below 10v, it's time for a new battery.