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You either have a defective battery or something is on and drawing power from the battery. Look at dome lights, trunk light, under hood light, brake lights, glove box light, see if anything is on. If the battery if over 3 years old or has be discharged more than once, suspect the battery. I used to have this problem with an '89 Thunderbird. It turned out to be a bad ground. On my car, it was the bolt that holds the little wire that connects the frame of the car to the negative battery terminal was rusted and corroded. A simple cleaning fixed it.

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Q: Why does the battery discharge in a few hours and then after a booster start is back OK with 13 volts?
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Related questions

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A battery booster is an emergency device for automobiles that can be used to jump start a car when the battery has died or has insufficient power to start the engine. A battery booster hooks into a car engine with cables that are similar to standard jumper cables. The unit contains its own battery that provides a charge when needed. In most instances, the batter booster is rechargeable so it can be used over and over again as needed.


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Booster batteries are the batteries that you use when you want to jump start a car. Regular alkaline batteries are the kind that you put in a flashlight or your TV remote. The alkaline battery is way cheaper than a booster battery.


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sure connect the positive terminal directly to the booster battery and the negative battery terminal to the body


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A cable booster also known as a jumper cable is used to connect with a discharged battery to a power source to jump start the vehicle. This is used when your vehicle can't start up.


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1990 f250 drains battery after a couple of days but would always start with jumper cables Last time I jumped it died after removing jumper cables Now won't start What happened?

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Why won't my 2007 Chrysler pacifica won't start its cold out and the lights was left on all night?

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Would a bad alternator on a 1999 Grand Cherokee Jeep Limited keep discharging a brand new battery?

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