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Q: Battery charger reads 0 on amp meter as soon as it is plugged in does that mean battery is fully charged?
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When a battery is hooked up to a battery charger how do you know when a 12v battery is fully charged?

The meter on your battery charger will be in the green


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 often should you charge golf cart batteries?

Keep plugged into charger whenever not in use, until fully charged.


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.


Why won't my laptop turn on when it is plugged into the charger Like when it is fully charged it won't turn on with it being unplugged If it does turn onit shows a black screen and then turns off?

You may need to replace the battery, charging port, or your charger. It may not be charging correctly.


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.


Does the RV 2011 Jayco Melbourne 29D need to be plugged into AC to open the main slides if the battery is fully charged?

No --the slides will open with fully charged batteries.


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.