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Jeep Wrangler JK
JK General Discussion
Dead battery then wacko stuff happened
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<blockquote data-quote="Linton E" data-source="post: 448758" data-attributes="member: 22019"><p><h2>Avoiding voltage spikes</h2><p>When you connect jumper cables from a running vehicle to a dead battery, the alternator in the running vehicle instantly puts out maximum charging voltage. That can create a voltage spike of up to 15.5 volts in both vehicles. And it’s that voltage spike that can fry computers and digital devices.</p><p></p><p>One way to eliminate the voltage spike is to leave the engine off in the donor car. That will prevent frying computers in the donor car. But if the car won’t start right up, don’t grind away to the point that you end up with dead batteries in both cars!</p><p></p><p>Jump-starting with a jumper pack (also called a booster pack or a juice pack) is a better alternative. The battery inside the jumper pack provides the boost to the dead battery at a safe voltage. When used properly, it’s the safest way to protect the electronics in the dead vehicle while providing enough boost to get the engine running.</p></blockquote><p></p>
[QUOTE="Linton E, post: 448758, member: 22019"] [HEADING=1]Avoiding voltage spikes[/HEADING] When you connect jumper cables from a running vehicle to a dead battery, the alternator in the running vehicle instantly puts out maximum charging voltage. That can create a voltage spike of up to 15.5 volts in both vehicles. And it’s that voltage spike that can fry computers and digital devices. One way to eliminate the voltage spike is to leave the engine off in the donor car. That will prevent frying computers in the donor car. But if the car won’t start right up, don’t grind away to the point that you end up with dead batteries in both cars! Jump-starting with a jumper pack (also called a booster pack or a juice pack) is a better alternative. The battery inside the jumper pack provides the boost to the dead battery at a safe voltage. When used properly, it’s the safest way to protect the electronics in the dead vehicle while providing enough boost to get the engine running. [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
Dead battery then wacko stuff happened
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