What Should Car Battery Voltage Be At Idle

The overcharge is very common where you will not get the chance of turning on the car easily. Any voltage above 12.9 volts is a good indicator that your battery has excessive voltage.

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14.4 volts is the gassing threshold.

What should car battery voltage be at idle. After rechecking 20 minutes later, i got 12.65 volts. Consider your car battery charged at 12.4 volts or higher and discharged at 12.39 volts or less. I could be wrong though, been a while.

A fully charged battery should read 12.6 volts or more with the engine off. Typically, the voltage should be around 14 volts during normal operation, so that the battery will charge. The battery voltage is a good indicator of the state of charge of the battery.

A fully charged battery should read 12.6 volts or more with the engine off. The indicated voltage is a function of the battery's state of charge and loading at the time, and what the car's electronics are doing to charge the battery. Check battery voltage and state of charge it is important that you first check the battery plus the charging system output (alternator).

When i was stopped at idle, voltage would drop to as low as 12.1 volts. With a volt meter measure the voltage drop across the 1 ohm resistor. Anything below that will let you know that your alternator needs to be replaced.

The secondary battery is connected through a battery isolator. 13.9v at battery at idle right after. I had a battery that was 10 years old that could start a v8 engine with only 11 volts.

14.9v at alternator output lug at idle 3. Completely agree that this is perfectly normal behavior. If your voltmeter is showing a voltage anywhere between 12.4 and 12.8, that means your battery is in good shape.

Put a voltage meter across the battery while running and voltage was fluctuating from 9 volts to. Click to see full answer. Went out jumped it started up but notice that the headlights and dash lights were fluctuating at idle if i wrapped it up it did smooth out somewhat.

A battery should turn over an engine with a voltage of 10.9 volts if you have amps. Measuring your car battery’s voltage can be a great way to determine how charged your battery might be. The higher voltage can lead to shock, not always but in many cases, it is found highly dangerous, and you should focus on getting it corrected.

In this case the battery charging voltage is 14.61 volts with the engine at high idle. A fully charged battery will typically display a voltmeter reading of about 12.6 to 12.8 volts. I know at idle my batteries range from about 13.8 in the jeep to 14.4 in the cayenne.

Voltage drop on car battery. When the car is at idle, the voltage reading of the battery should range between 13v and 14.6v. These will usually be described as 12 volt batteries.

Just measured on my car: This does not seem normal to me. The voltage drop reading represents the current draw.

Again, research suggest voltage should be upwards of 14.3 for most cars. At idle, most charging systems will produce 13.8 to 14.3 volts with no lights or accessories on (although some may charge at a slightly higher voltage depending on temperature, engine rpm, type of battery, and the battery's state of charge). The ideal car battery voltage with the engine running is between 13.7 and 14.7v.

I could swear i've seen my volt meter read 13.5 or so on a battery before (not connected to a car) but that was an sla battery. What is a healthy car battery voltage? Basically it is sitting idle at this point.

When regular car batteries get fully charged, its reading will be about 12.6 volts. When the vehicle is turned on the primary (la,12v,140ah) battery shows 14v across the terminals, the secondary (agm,12v,80ah) 12.8. Note that this should be the reading when it has been fully charged but not in use.

It is not a big issue until your battery gets overcharged and if try to turn on the car many times then it. With the engine off, you should get a reading of 12.6 volts. Disconnect the other battery.with the 1 ohm resistor installed enough current will flow keeping all memory circuits active.

To get a true voltage reading of the cars battery it is important to measure the voltage after the car has been sat for a period with the engine off, preferably overnight, this provides you with the “car battery open circuit voltage” or also know as the “resting voltage”. 13.6v resting battery voltage car off (overnight) 2. Ignoring it will only make it worse and a faulty alternator will slowly damage the battery.

If you can not start your car with the volts at 12.1 then you have an amp problem (possible sulfated plates) 14.8 would start to be a worry (there might be liquid or corrosion on the battery. The battery above will slightly gas, but not enough to be harmful, and the battery will get a quick full charge recovery after starting.

Each battery is separately connected to chassis ground. A fully charged car battery voltage should be 12.6v or above, this is with the engine off. Avoid short driving distances (less than 10 miles) as these drives do not fully charge your batteries.

But to make this possible, the alternator has to manage 14 volts at the battery terminals, the whole time it is being charged. If the alternator is putting out too much voltage (15+ volts), it is likely your battery acid will boil over out of the battery. As others have posted, it can go up to 15v or even a bit more.

Appreciate readings from other members if possible on what your charged battery voltage is when charged. It is also important for people to realize that cars are not meant to be kept idle. When car is running with accessories off, i am getting voltage of 13.78.

Realistically speaking, a flat battery can be charged up to 80 percent in 2 hours.

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