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Volts.

12.6 volts = Full Charge

12.4 volts = 75% Charge

12.2 volts = 50% Charge

12.2 volts = 25% Charge

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Q: Do you check a battery's charge using volts or amps?
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How many volts in a battery at different percentages of charge?

Actually A "12" volt battery produces 12 to 14 volts at almost any charge %, even though your guage showes the charge in volts, Its actually amperes that get reduced in batterys.,,,,,,,, 80% should be sufficient charge to start A vehicle that is in good condition.


What solar wattage do you need to charge a 12 volt car battery?

12 Volts x .83 Amps = ROUGHLY 10 WATTS. (automotive batterys are actually 12.6 volts and are charged at 13.5-13.8 volts). Any wattage will charge it, the question of how fast is determined by the total wattage you're supplying. It will damage the battery if you're overcharging it, and it will not work if you are using the battery while you're charging it. Using it on and off intermittenly will keep the battery charge and will work I:E: using it for a 12 volt cigarette lighter and you smoke a pack a day. ;)


If you have 2 12 volt batterys connected to a series how many volts would you have?

You will have 24 volts DC.


How can you check your car battery with a voltmeter?

With the engine off check the voltage at the battery. A fully charged battery will read 12.6 volts. At 75% charge it will read 12.4 volts, 12.2 at 50% charge, and 12.0 volts at 25% charge. Now start the engine and check the voltage at the battery. It should read 13.5 to 15.5 volts if the alternator is working properly.


Can you put THREE 12v batterys in series?

Sure you can and you will end up with 36 volts. Connect them in Parallel and you will have 12 volts.


How do you check a 12 volt battery for adequate cranking capability?

A fully charged 12 volt battery with engine not running, ignition off will read 12.6 volts at 100% charge. 12.4 volts at 75% charge. 12.2 volts at 50% charge. 12.0 volts at 25% charge.


How do you make 2 12 volt batterys 24 volts?

Connect them in series and you will have 24 volts but you will have the same A/H as one of the batteries. Volts double but A/H stay the same.


What are typical voltages for half charged batteries?

12.6 volts = 100% Charge 12.4 volts = 75% 12.2 volts = 50% 12.0 volts = 00%


How much voltage does an automobile battery supply?

100% charge = 12.6 volts 75% charge = 12.4 volts 50% charge = 12.2 volts 25% charge = 12.0 volts


How do you perform a voltmeter test of a battery to determine its state of charge?

You will need a digital voltmeter. Set the voltmeter to 20 volts DC. Check it with the probes. 1. 12.68 Volts = 100% Charge 2. 12.45 Volts = 75% 3. 12.24 Volts = 50% 4. 12.06 Volts = 25% 5. 11.89 Volts = 0%


Battery will not charge on your 1986 v65 magna?

First, make sure the battery is good. Check the water level, then check the voltage. Must have more than 12 volts on the meter. If not, charge and check again. This will ensure that the battery does hold a charge. If all is good, then, with the engine running, check the voltage at idle, should have around 13 + volts, and at 2000 rpm, should have around 14 volts. If not, 2 things, the voltage reg. or the stator will have to be replaced.


How can tell your battery need changing?

Your question needs clarification. Car battery, Cell phone battery, camera battery, etc. Question was posted in car batteries category. You can check it with a digital volt meter car not running. Set the meter to 20 volts DC. Here is what you will see. 12.6 volts = 100% charge 12.4 volts = 75% charge 12.2 volts = 50% charge 12.0 volts = 25% charge