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The meter on your battery charger will be in the green

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Q: When a battery is hooked up to a battery charger how do you know when a 12v battery is fully charged?
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What keeps a battery charger from over charging a battery pack?

Most good battery chargers are automatic and will stop charging when the battery is fully charged. But if the charger is a manual charger it can overcharge the battery. With this type charger it is up to you to remove the charger when the battery is fully charged. Normally this is based on the amount of time the charger takes to charge the battery pack. Operators manual will list the time.


What reading on a battery charger will indicate the battery is charged fully?

If the charger has a ammeter on it then it should show close to zero which means the battery is no longer pulling any current from the charger which would mean the battery is fully charged. If it has only a voltmeter then it should show 12.5-13.5 vdc


Can you overcharge a car battery?

You bet you can. That is why it is always advisable to use an automatic charger that shuts off when the battery is fully charged. If you do not have one then charge it for a couple of hours and then remove the charger and check the voltage at the battery. A fully charged battery will read 12.6 volts. 12.4 at 75% charge, 12.2 at 50% charge, and 12 Volts at 25%. If it is not fully charged then put the charger back on a little longer.


How many hours does a lawn mower battery have to be on a float charger?

A battery float charger is intended only to keep a fully charged battery from losing its charge. It will NOT work to charge a battery that is discharged or damaged. Check the voltage of the battery to be charged. Do not use charger if the battery voltage is less than 9.6 volts.


How long will a 10amp charger charge a 12V battery?

Till the battery is fully charged. -Could be 4-12 hours.


Can a 12 volt maintenance free car battery be overcharged using a 10 amp charger?

Yes, if the charger does not automatically shut down when the battery is fully charged.


What should battery charger needle read?

That depends on the battery, and the charger. my charger has different settings for higher amps to give a faster charge or jump. A fully charged battery will show 12.6 volts. The charger will read it's maximum amperage if the battery is totally discharged. A fully charged battery will read 12.6 volts with a digital DC volt meter. If it reads 12 volts it has less than 25% charge.


How Long Should You Charge a Motorcycle 6 Volt Battery?

Depends how flat it is and the capacity of the charger and also capacity of the battery. A 6 volt battery fully charged should read about 6.5 to 7 volts when fully charged.


Can you leave a trickle charger on a car battery for 5 months?

Yes, that is the purpose of a trickle charger. Just make sure it is an automatic charger that comes on when needed and then stops charging when the battery is fully charged. You can leave it on a battery for years if need be.


How do you charge a 3DS with no charger?

Other than using a charger to charge the 3DS, the only other option is to replace the 3DS battery with a fully charged one.


How long do you charge a 7.2v battery?

About 4-5 hours. You can purchase a smart charger that has a light that turns green when the battery is fully charged as well.


Can you ruin a car battery by over charging?

Most definitely you can ruin it. Always charge an auto battery with an automatic charger that shuts down when the battery if fully charged.