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SVT Shelby GT500
Dead battery after 3 weeks of no driving
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<blockquote data-quote="OptimaJim" data-source="post: 9217696" data-attributes="member: 96558"><p>Dshavers, an underdrive pulley can reduce the effectiveness of your alternator while your engine is running, may not allow your battery to maintain a charge under certain driving conditions or may even prevent your battery from ever getting fully charged. </p><p></p><p>Voltage measurements of the battery while the engine is running is the output of your alternator and should be approximately 13.7-14.7 volts. If you don’t have a multimeter, you can test this by starting the car and turning on the headlights. If they are dim, it indicates the lights are running off the battery and that little or no juice is being produced by the alternator. If the lights get brighter as you rev the engine, it means the alternator is producing some current, but may not be producing enough at idle to keep the battery properly charged. If the lights have normal brightness and don't change intensity as the engine is revved, your charging system is probably functioning normally. </p><p></p><p>I have not made measurements for the tracking system you have, but I do know that some alarms and tracking systems will completely discharge a battery within a few weeks.</p><p></p><p>I agree with everyone who recommends checking your key-off load and buying a battery tender/maintainer, especially with the way you have your car set up. They are a great investment, which will help extend the life of any battery. </p><p></p><p></p><p>I hope you get your situation resolved soon!</p><p></p><p>Jim McIlvaine</p><p>eCare Manager, OPTIMA Batteries, Inc.</p><p><a href="http://www.facebook.com/optimabatteries" target="_blank">Optima Batteries | Facebook</a></p></blockquote><p></p>
[QUOTE="OptimaJim, post: 9217696, member: 96558"] Dshavers, an underdrive pulley can reduce the effectiveness of your alternator while your engine is running, may not allow your battery to maintain a charge under certain driving conditions or may even prevent your battery from ever getting fully charged. Voltage measurements of the battery while the engine is running is the output of your alternator and should be approximately 13.7-14.7 volts. If you don’t have a multimeter, you can test this by starting the car and turning on the headlights. If they are dim, it indicates the lights are running off the battery and that little or no juice is being produced by the alternator. If the lights get brighter as you rev the engine, it means the alternator is producing some current, but may not be producing enough at idle to keep the battery properly charged. If the lights have normal brightness and don't change intensity as the engine is revved, your charging system is probably functioning normally. I have not made measurements for the tracking system you have, but I do know that some alarms and tracking systems will completely discharge a battery within a few weeks. I agree with everyone who recommends checking your key-off load and buying a battery tender/maintainer, especially with the way you have your car set up. They are a great investment, which will help extend the life of any battery. I hope you get your situation resolved soon! Jim McIlvaine eCare Manager, OPTIMA Batteries, Inc. [url=http://www.facebook.com/optimabatteries]Optima Batteries | Facebook[/url] [/QUOTE]
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SVT Shelby GT500
Dead battery after 3 weeks of no driving
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