It can wear down the battery and decrease over overall life of the battery. Just charging it until it it's fully powered can help to keep the battery life as high as possible. Make sure you do not overcharge the battery and lower it's lifespan per charge.
Yes if it is a sealed battery. Even if it is not sealed it may still be good. connect it to a battery charger and see if it will take a charge.
If it still won't charge buy a new charger. If it still doesn't charge take it to your local phone store and they will fix it for you.
Defective ignition switch, loose or corroded battery cables, starter connection, bad battery cable, or the battery can be bad even though it shows a full charge.
the battery could have a dead cell, this could cause it to not charge. Have the battery tested to be sure.
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Get to a hospital ER. If it still has an electrical charge on it the battery may burn holes in your intestinal tract and may even cause death. It is very important to have it removed as soon as possible.
No, why would you even think that is possible?
Make sure you have a good connection at both posts. Poor connection can cause intermittent problems. Even if it is a new, a battery can still be faulty. It might even hold a charge for a while then fail. To be sure have the battery tested - easily done at most service locations. If the battery is good, next likely problem is the alternator. If it does not recharge the battery enough while you drive the battery will probably not have enough charge the next time you try and start.
Yes. A fully charge battery will read 12.6 volts with engine not running. A 75% charged battery will read 12.4 volts. At 50% charge, it will read 12.2 volts. At a 25% charge it will read 12 volts, but that will not be enough to even start the engine in most cases and unless the alternator is bad the battery is defective. With the engine running you should read 13.5 to 15.5 volts at the battery. Any less and the alternator is defective.
Yes, you can even charge it on the vehicle. Make sure you charge it slowly and either use an automatic shutoff charger or pay close attention the the charge. Do not overcharge. It is best to charge it slowly with a 10 amp or lower charger. Make sure the battery cables are clean and tight.
If the engine will not even crank, then suspect a defective battery or starter. Start by removing both battery cables and cleaning the cable connections and battery posts. Reconnect them and see if it starts. If not put a battery charger on the battery and fully charge it. If it will not accept a charge is is defective. It the vehicle starts then you may have a defective alternator. If the battery is good and it still will not start, suspect a bad starter. You will have to remove it and have it tested.
Your Jeep probably won't jump start because the battery is not strong enough to hold a charge anymore. You will need to replace the battery. +++ You will need to replace the battery if it won't hold a charge, but given a suitable source vehicle it should still be possible to jump start (NB 'jump' electrically, not tow-start) any car even with a fully flat battery.