Rep: 13
1
How to connect a external battery charger to charge the battery in the car?
Will'i disconnect the terminals or not.Is any problems whit electrical system disconnecting the terminals?
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Rep: 782k
1,1k
893
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@gabriele you cannot charge a battery from a battery. Use your working battery to start the vehicle as described by George Abraham. Keep the discharged battery connected to the vehicle while using the working battery to boost the vehicle. Then run the vehicle for a while to ensure the old battery works. This will only work if your battery is just discharged. If it does no longer hold a charge you will have to replace it.
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Hi,
If I can also add, get the alternator output checked (or place a voltmeter across the battery terminals with the engine running - be careful when you do this the engine is running) and ensure that the reading is between 13.8 - 14.2V DC. It may be that the alternator is not charging the battery correctly (<13.8V)and that it is slowly discharging and that the battery warning light is not coming on for some reason. Just a thought.
Rep: 21,8k
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Very simple. Just get your jumper cables, connect your - (negitive) to your other -, then connect your + (positive) to your +. Start your car, let it run for a while, turn the car off, disconnect the battery, then turn the car back on to charge the battery more.
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