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Assuming we're talking about the `usual' 12 volt car battery' the resting voltage should be around 11 to 11.5 volts. Under charge it's as high as 15 volts as supplied from the alternator,and most cars won't start if the voltage is under 10.5 to 11.5 volts. The term `12 volt battery' is what's referred to as, `nominal' or `in name only' as a general reference and not meant to be an accurate description.
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∙ 15y ago
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Is a car battery AC or DC volts?
dc - the voltage is a constant 12 volts nominally in a normal car battery.
How can you convert your syphon pump that runs on a 12v car battery to run on normal household batteries?
I have no idea what a normal household battery is. Generally you would have to match the current and voltage of the car battery and then you have the issue of how long the battery can sustain the current, or ampere hours.
What causes voltage on 1999 Saturn sl2 to go from 12.2V to 14V at random times?
The cause is the voltage regulator within the alternator (working normal). When the voltage higher it is charging the battery like after you start your car or have the headlights and wipers on. The voltage regulator keeps your battery charged up. In order to charge the battery, voltage must be higher than battery voltage.
Why would a car battery bubble?
Minor bubbling is normal when battery is charging. Excessive may be due to the battery being overcharged--perhaps a bad voltage regulator.
How do you measure the voltage on a car alternator?
get a multi meter that reads dc voltage & touch the black (negative -) wire to the negative battery post & the red (positive +) wire to the positive battery post with car running. car off is battery voltage, car on is alternator voltage.
Can a car recharge its own battery if the battery goes completely dead?
A car cannot recharge its own battery if the battery is completely dead, because you need excitation voltage in the rotor to develop a voltage in the stator. Besides, you need voltage to run the ignition/computer system, and you need voltage to start the engine. That said, most batteries are not completely dead. If you can jump start the car, and assuming there is no electrical problem anywhere, you can run the engine and charge the battery. Problem is that most car batteries are not designed for deep discharge, and the probability that damage was done is greater than normal. Also, if the battery is very deeply discharged, you probably ought to charge it with an external charger (with the battery disconnected from the car) until its voltage is somewhat normal and its electrolyte is within limits for specific gravity.
How far should the voltage on a car battery drop when cranking the car?
when cranking the engine the battery voltage should not fall below 9.6volts if so replace battery
What is a normal inverter battery voltage?
12 volt of an ordinary inverter battery
Can you jump start a Honda ATV from car battery?
Yes, if your car battery is the same voltage as the ATV battery.
How is it possible to have a high current with a low voltage such as in a car battery if current equals Voltage divided by Reistance then shouldn't a low voltage produce a low current?
It's all relative. A battery has internal resistance. Batteries are not "ideal" voltage sources. If there is a "heavy" load on the battery (low resistance), the voltage you measure on the outside of the battery will be lower. A car battery is normally thought of as a 12 volt battery. When there is no load (disconnected) you can often measure in excess of 13 volts if it's fully charged. During normal cranking of the engine, the voltage can drop below 11 volts.
Is a car battery a voltage source?
yes
Does a car battery have smaller or larger voltage than a flashlight battery has?
Larger.
