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Impossible to say. You just use the battery and see if it will take and hold a charge.

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Q: Is a battery any good after it has been overcharged?
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What gas is produced from car batteries?

Any lead-acid battery system when overcharged will produce hydrogen gas.


Why did your battery get fat?

If you mean the battery is bulging or swelling then it may have been frozen. This will cause the electrolyte to freeze and bulge. A battery that is being or has been overcharged will also bulge or swell. A battery that is not secure and bounces around can have internal damage to the plates will can cause them to explode and bulge the battery. In any case I would immediately have your charging system tested at an auto parts store as your voltage regulator may be putting too much voltage into the battery. You should get a reading of 13.5 to 15.5 volts DC with the engine running at idle when you test at the battery posts. No matter what you find, replace this battery as it is dangerous and can explode at any time.


Have 1986 gmc 1500 pickup it wont crank starter has been changed out battery is good fuses have been checked any suggestions?

cables and or check for good ground first.


How could a car battery explode?

Auto batteries contain Sulfuric acid and all batteries produce a very small amount of hydrogen gas which is highly volatile. If the battery is overcharged it will produce more hydrogen gas than the vents on the battery can safely release. Any spark can then cause an explosion. Also connecting a jumper cable in reverse can cause the battery to explode.


Can you use a 9 volt charger for a 6 volt battery?

This is not advised! The 9-volt charger might have a current limiter so that nothing burns up, but it any case if left on it will destroy the 6 volt battery by overcharging. A 6-volt charger is not expensive.


Why wont your 1990 Honda Accord keep a charge with a good battery and alternator?

If you are 100% sure the battery and alternator are good and the battery is loosing it's charge then something is on pulling power from the battery. Can be any light or any relay on the vehicle.


How do you fix an overcharged battery?

That largely depends on what kind of battery you are talking about. However, most rechargeable batteries will likely be ruined by overcharging. If you are referring to a car battery, it cannot be repaired, except to be rebuilt. Simply put, when a battery is overcharged, the plates inside the battery lose oxides. That, and overheating, also causes the electrolyte solution to lose water/moisture. This permanently reduces capacity and leaves portions of the plates exposed to further oxidation. Then, it's all downhill from there! Spiral cell and/or gel filled batteries (such as Optima) are affected somewhat differently, but the effects of overcharging are even worse for them. If your battery has been overcharged, or you suspect any problems, have it tested. Most auto parts suppliers (AutoZone, for example) will test your battery for free. While the tester cannot show the internal condition of the battery, it does effectively reveal its overall condition by testing voltage, amperage, discharge rate, and recovery time. These factors together tell whether or not the battery needs to be charged, or simply cannot take/hold a charge anymore. **Disclaimer**: This is the general rule of thumb. There are battery re-conditioners on the market that can, in rare cases, help save a battery if the damage is caught early and minimized. However, the cost of these devices usually offsets the slim chances that it might work. Also, they're usually more expensive than simply replacing the damaged "might-be-okay" battery with a brand-new one.


Had truck checked alternator and battery are good but battery wont stay charged?

Then something is on pulling power from the battery. Any light on the vehicle or any relay that is stuck closed.


What sort of car battery are best for tropical weather conditions?

Any good battery will work well.


If a car battery needs to jump start after not using it for a while does it mean the battery is not good any more and needs to be replaced because the power in it was leaking?

Not necessarily. Any battery, even a good one, will slowly loose it's charge. Could be that something drained the battery. Clean the battery case and the posts. Slow charge the battery until it is full and then use it. You will soon know if it is good or not.


What is the best car battery for a 2006 jeep commander?

Any battery can be a good battery. The Walmart battery is an excellent battery at a good price. Know that Walmart does not manufacture batteries and it is made by one of the 4 manufactures in the U.S. The best battery would be an Optima but they are pricey.


Why does your 94 intruder keep draining the battery?

Dead cell in the battery, or something is on pulling power from the battery. Any light on the vehicle or any relay that is stuck. I am assuming you have checked the alternator and it is good.