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How long do you need to keep booster cables on until battery is charged?
Wiki User
∙ 14y ago
As long as you are running the car you can take them off immediately after the car has started. The alternator in the engine will then charge the battery as you drive, the motor being on. Drive it around the block a few times, or for 10-20 minutes and you should be good, unless it's really cold where you live then drive it a while longer.
If this is a perpetual problem you may need a new battery, I always go to 'autozone', they will check the battery, while in the car, for free as well as the alternator output. They even put a new battery in for me, for free, after I had purchased it of course.
Wiki User
∙ 14y ago
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The car batterie is dead when a gave the car a boost the car started but when you take of th booster cable it staled?
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What do you charge a lawn mower battery?
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Your ground post on the jumper cables is not fully connected to the body of the car. You may have to let the cables stay connected to both cars until the battery charges up. This may take up to 10 minutes depending on how low your battery is.
