Since the battery was already 4 years old, that was the first thing we thought of and immediately replaced it. Disconnecting or replacing a battery on a computer-equipped vehicle may cause starting, driveability and a number of other problems, including loss of air conditioning, power accessory functions (door windows, seats, sunroof), false warning lights, even damage to certain electronic modules!. When you car battery discharges soon after shutting down the engine, it's commonly caused by one of three things: Your battery may have reached the end of its service life (often 4 or 5 years). Use a voltmeter to check your charging system properly. Car batteries aren't as trouble-free as some other parts of your car. remove one fuse at a time. Many new car batteries are of the sealed 'maintenance' free variety. Then disconnect all the cables from the battery, and let it sit overnight. The car drain the battery. All electrical draws on the battery will cease and your battery will be protected. If the battery is failing, you typically get several other warnings as well. If you have it in storage disconnected from the car, a charge every month or two will help keep the self discharge from draining the battery. a short while would charge it enough to last a day or two to allow it to start the car again. Apple will, instead, recycle and replace them for $49 for each new bud, and $49 for the charging case. Even new batteries can slowly drain because of self-discharge. Your accessories are constantly using your car’s battery, so if you are not charging the battery by not starting your car, your battery will likely die. 5 volt potential or higher will result in a battery discharge. Battery disconnect switches can help preserve battery life and prevent theft or tampering. I'm guessing that the battery should be disconnected to avoid draining it. Can an alternator draw voltage from battery if engine is off? Something is drawing power from battery when everything is off and engine not running. Even though it has positive ground when I hook up the charger do I still put the red on positive and black on negative. of sparks, something is draining the battery. 6v, next day load test for another 20 min, standing voltage is at ~12. A car battery can run down for any of several reasons: You accidentally left the lights on or some other accessory that pulls power from the battery even when the ignition key is off. My possible thoughts. placed VOM between positive cable and battery. note: when I first installed the new battery, after idling the car for 20 min or so (as battery had been disconnected for ~2 years) the standing voltage was about 12. 5V with the car unlocked, door open. Schrodingers. My battery died after coming back from long vacation + cold weather. Such like a car battery will get completely discharged during the period from 2 to 3 months. We have found in a AllStays. We have had the battery go dead four times. The car will just die on me while driving and the battery just drains to about 8 volts. Battery will die for no apparent reasons if left un-driven for a few hours or days. A friend of mine told me that I should always disconnect the positive terminal of the battery first to keep the electricity from spilling out of the battery. Doing so would prevent the battery from being drained and from having an untimely death. Another easy solution to prevent any 12V battery drain because of a 12V power source required by a brake system is to use a portable 12V battery booster unit can be gotten from anywhere in several sizes, just set on towed floor, charge back up when on shore power. The Kensington Windshield/Vent Car Mount with Sound Amplified Cradle for iPhone acoustically increases speaker volume without additional battery drain to the iPhone, allowing drivers to easily navigate while keeping their eyes on the road. In fact, your old battery probably did not need to be replaced, just charged which plugging in to an outlet at home could take care of. Great little car. Check your smoke alarms monthly to ensure that they are in working order. Do this, get a battery charger for your car, charge the battery, and when it's done measure/record the voltage when the battery is disconnected from the car and connected to the car. I did not drive it for ten days. It’s worth it. Although travel trailers do not use a battery for powering an engine, the trailer uses a battery, or set of batteries, for powering auxiliary power, like lighting and appliances. Every few months I go out, hook up the battery, start it and drive it a few feet to keep things lubed. The contact mentioned that the battery had to be disconnected in order to stop the failure. If you only plan to leave your car in storage for a short period, all you need to do is to disconnect the battery. Disconnecting a battery while the engine is running can destroy the electronic components, e. When I take it down to the woods by the river, which can be almost daily, I make about a 2 mile run round trip. A voltage drain will cause a reading on the meter. A problem in an electrical system is affecting battery power. Jump started it and it was fine. Charging your phone while on the road could drain your car’s battery, too. That is why if your car battery won't hold a charge it is a major issue because your car won't start and you will have to jump it all the time. My wife drives a Honda Accord. the charging system can act like one problem but it be another, i though my battery was the problem but it was the alt, and i've also had the opposite. Hi, I've heard that problems arise with my car (BMW) when the battery is disconnected ie. Disconnected the radio and it will start after not being driven for over a week now. I have assumed the car battery voltage is 12V and the welder voltage is 100V. Then try a start. But then, dependent on make/model, you could have problems with the radio code and the key fob recognition. So my problem is back. There’s nothing worse than going out to your car, especially when you’re in a rush to get somewhere, and finding out that your car battery is dead. That will also put an extra load on the charging system. Car batteries aren't as trouble-free as some other parts of your car. Tannon Weber wrote: Disconnect the negative cable from the battery and bridge the gap with a multimeter, looking at. This happened every once in a while, but seemed to be happening more frequently. One or more on-board solid state control modules, such as the PCM, may at some time, exhibit a failure mode that causes a high parasitic drain on the vehicle's battery. My wife drives a Honda Accord. Keeping The Lights On. Three weeks later the new. If battery voltage drains below 11. Is your battery fully charged for winter? Let one of our techs check! If you have car battery drain on the brain, it's time for a free battery check. This is the last option. Another easy solution to prevent any 12V battery drain because of a 12V power source required by a brake system is to use a portable 12V battery booster unit can be gotten from anywhere in several sizes, just set on towed floor, charge back up when on shore power. Want to learn why your car battery keeps draining? Read on and find out how to check it and what you can do to prevent this from happening. Every few months I go out, hook up the battery, start it and drive it a few feet to keep things lubed. What else could be wrong with my car besides the battery? Thanks in advance, Kurt. It's worth it. The first time, Ford service sent a technician to jump-start the car. No juice to drive fuel pump and spark the plugs. I just disconnect my battery if its standing for more than 4 weeks to stop the alarm draining it. Car will not start normally either first thing in the morning or during day. It may help to isolate what is giving you the problem. If you are disconnecting the battery, there would be no drain on it. I found my short so I no longer need it. Achuba, who also narrated how he was treated by the Police when his impeachment was announced on Friday, said, “I was in my official residence on Friday, all of a sudden, my power was disconnected. Don't connect the battery cables, just use your meter. Advance took the battery and are hooking it to a charger for a few hours. electrical probs - new battery drains overnight, help needed: 1. This taps into the running light circuit (brown wire) of the 4-way you have on your vehicle for tow bar wiring. , that operate continuously after the engine is stopped and the ignition key has been switched off. The fact that disconnecting the battery doesn't seem to stop the drain makes me question if that is in fact the problem. So I bought a new battery, and put it in since I knew it was old and most likely bad. If we do not disconnect it after every use while it is parked, by the time we try to turn the car on again, it will not start, you either have to charge the battery or jump start it. My first trip i had a tent opening attached to the hatch for 4 days. The Cause of Samsung Galaxy/ Android Slow Charging Battery Drain issue While Android Marshmallow comes with a smooth and easy navigation user interface. If just leaving the car at idle (on days you start it) for 10 minutes I'm not sure how much the alternator charges the battery at low engine RPM (idle). If the drain is not caused by a vehicle lamp, remove the fuses from the interior fuse junction panel, one at a time, until the cause of the drain is located. Hyundai Sonata Battery Drain Mystery. See the latest posts to this auto repair information blog. We have had the battery go dead four times. 5 volts on a 12 volt system that is a problem. If the battery would typical go dead if left for a week, leave the battery disconnected for a week and see if it will start when reconnected if so the battery is good. Built for 6-36V systems, this switch makes it easy to switch off your car’s battery and protect your car from excessive battery drain, and fire. In this scenario it won’t operate until you input a special code. I'd also like to keep my radio presets as it's a huge hassle to recode everything. 6-amp drain on the battery. An average car battery has a capacity of around 48 amp hours which means that, fully charged, it. Car Battery Drains While Disconnected | Car Battery Drains While Disconnected | Battery Reconditioning guide showing you how to fix your battery instead of replacing it. WHY A CAR BATTERY RUNS DOWN. 40a would drain battery in 4 days, but when I left my dome light on (about 1. My battery died after coming back from long vacation + cold weather. 5 volts, the battery will drain quickly. In a DSM, this is the fuse that controls the footlights that go on when you open your car door. The first time, Ford service sent a technician to jump-start the car. Disconnect the Battery. Things to think about if you’re ‘laying up’ a classic car: Spraying unpainted metal parts with WD40 will reduce corrosion. They work by cutting off the connection between your battery and the accessories that can drain it. While it may be difficult to identify the specific system or device that is bringing about battery drain, the best thing to do is to troubleshoot the system. For example, if you have a theft deterrent radio and you disconnect the battery, it might stop working. So I have been using the car with no radio for the past couple of weeks and all good. I spent a good part of Sunday afternoon trying to track down a parasitic key-off battery drain on my car. Stock BMW batteries typically last around 4 to 6 years. Pulled each fuse and switch device in both fuse boxes and continuity continuesIs it a fault in the starter? Bob. He disconnected the nav to test it for a couple of days, and sure enough, no more battery drain. But here I'll concentrate on areas of the topic that seem to be totally overlooked or else badly misunderstood. If its not going to be used for some time, just disconnect the battery. Do not ever disconnect the battery ground strap from the battery while the car is running. Leaving the rear hatch open seems to drain the battery. Your car may not start if you do not use it for a while, too. LotFancy 6V 12V 24V Side Post Car Battery Disconnect Switch for Auto Truck Vehicle Rv Boat Marine, Car Battery Terminal Link Switch, Battery Cutoff Shut Off Kill Switch Auto Parts Fix Battery Drain. You Will Need. Top 5 Causes of a Car Battery Draining. Love it when a plan comes together. While the issue of an inverter draining a car battery is fairly complex, the general rule of thumb is that the inverter won't drain a battery when the vehicle is running, and especially not when it's driving around. Note! To save power the LCD backlight goes off after a while. A good battery should be able to sustain this for several weeks. The third time, the car was towed and the battery replaced again. I wanted to find out for sure, that when I told her to disconnect the negative cable, that no current could leak out of some shorted component on the car. You understand the problem. If you find your battery going flat after only a day or two, and you know that it's not the battery's fault, chances are you have a parasitic electrical leak/drain that's stealing your amps. But that part was disconnecting the battery while driving since the headlights would flicker at idle. Although travel trailers do not use a battery for powering an engine, the trailer uses a battery, or set of batteries, for powering auxiliary power, like lighting and appliances. If the battery and charging system are okay and the battery keeps running down, check for a voltage drain somewhere in the electrical system. When the battery is disconnected, any fire or rough metal that melts or cuts the. I would ensure its charged before I do though. Great if you have a small electric leak draining your battery, or if you want to store your vehicle for a while. When you car battery discharges soon after shutting down the engine, it's commonly caused by one of three things: Your battery may have reached the end of its service life (often 4 or 5 years). My own testing has shown me that, generally, instantly after cranking the car. The car will be in a garage. Use a 12V test light, Attach the clip from the test light to the battery post and touch the probe of the light to each wire, when the light lights you have found your draw. Often this happens immediately after hitting a bump in the road or after installing a new battery. Or you can pull the negative cable, pull the positive cable, put a ampmeter between the positive cable and the positive post, and put the negative cable back. During your vehicle's lifespan, you may need to disconnect the engine battery for a variety of reasons ranging from simple car maintenance to full engine repairs. A problem in an electrical system is affecting battery power. Batteries will lose some voltage while in storage for extended periods of time, but will typically have enough power to start your vehicle. Is your battery fully charged for winter? Let one of our techs check! If you have car battery drain on the brain, it's time for a free battery check. a short while would charge it enough to last a day or two to allow it to start the car again. Thinking I might disconnect the battery to stop battery drain and the alarm going off (not that it has) by accident. She hasn't driven it in that time. I presume you have measured the current drain in a battery lead with everything switched off when you get the 130mA. The battery acts as an electrical capacitor and filter on the entire electrical system, and the car's electrical components expect it to be there, even if it doesn't hold a charge. COM — If the battery warning light (a light in the shape of a battery symbol) on the dashboard comes on while you’re driving, that means the charging system isn’t working, but the fault. I'm guessing that the battery should be disconnected to avoid draining it. Start by connecting a digital multimeter to the negative battery terminal of your vehicle. A simple test to help you find why your car battery is always dead in the morning. While this is one option to retrieve. Battery Drain with Disconnect We had a second battery installed at the dealer because we will be doing a fair amount of dry camping. Should I disconnect my battery to charge it? Honest John advises on the best way to care for a car battery (especially on my Morris Marina), I always disconnected the battery because it was. The only downside is that I lose the radio stations. We will need to disconnect the battery so having this code handy will allow you to gain control of your GPS and/or radio after you reconnect. If you're amp is connected straight to the battery, it will continue to drain it even after the car has been turned off. Oh and someone did put a battery saver device in it. People often think that a dead battery should be discarded and pay huge bucks to buy a brand new one. It would be a good idea to remove the car battery while you are away. I have got a major parasitic battery drain problem of around 9. If you disconnect the battery, there's no need to start the car. How to Stop Car Battery Drains dim753 ( 58 ) in life • 2 years ago The car battery is so dead that the dome light barely makes enough illumination to help you find the key slot, not that turning the key generates anything more than a muted click under hood. Battery draining when plowing. Significant high voltage transients can result from the car's charging system, particularly when subjected to intermittent high current loads. If the voltage is still in the proper range, chances are the battery is still good. placed VOM between positive cable and battery. This is really freakin annoying. Once it disconnect from power, it will cut the power from the yellow wire, only keep the yellow wire's power for small memory IC for keeping setting data. If your battery was running fine the last time you drove and now won't start the car, one of the following problems may be to blame. The EGR valve cleared itself after a 200 mile trip. 7 volts when engine is off, it automatically DISCONNECTS the load. EASILY Identify Vehicle Battery Draining Problems. When I take it down to the woods by the river, which can be almost daily, I make about a 2 mile run round trip. Don't connect the battery cables, just use your meter. Ok MY battery is draining while sitting will not start after a few days. Read on, and learn about the 6 most common reasons that may suck the juice of your car battery. Sidetracked - fix locks, alarm, etc: Started checking fuses and found #8 inside car blew. You will then know if its the car or the battery. This time I took it to my independent BMW mechanic and, after testing the entire electrical system, he found my nav unit was faulty, that it was constantly draining the battery. how the hell do you think the battery runs the car. A good battery should be able to sustain this for several weeks. A battery with a battery disconnect switch (green knob) installed, and the meter connected across the disconnect switch, between the battery negative terminal and ground. disconnected and recharged battery. A large gauge wire from the positive terminal on the battery is going to be going to the starter. Fearing something might happen with all the darn computer parts on my car I hooked it back up not wanting to leave it off for too long. However, it’s possible there is a drain on that battery caused by the tow wiring. Either device will enable you to fully disconnect the truck battery while towing. takes about 3 seconds to do so. Don't connect the battery cables, just use your meter. If you only plan to leave your car in storage for a short period, all you need to do is to disconnect the battery. No issues, other than battery dying if we let it sit for several days without driving it. Took to ford and they disconnected the battery, ran tests and found it was the shaker. 12 volt battery for the Toyota Camry Hybrid 2007 to 2016 Picture of the the Optima Battery installed in a Camry Hybrid Conclusion: We are recommending a Prius size battery for the Camry Hybrid (but not the same battery) because the electrical demands are very similar and hundreds of customers went this route and have been satisfied. The battery is not being recharged while the vehicle is being driven (you have a charging problem). Car manuals do tell you to disconnect the battery before charging. it's also a safety feature,if you ever think you have an electrical fire, pop the hood and in three seconds the battery. Get someone to start the car every two weeks and drive it for about 15 minutes, if possible. Some circuits may require diodes to prohibit current draining or bleeding while towing. If you already have the text you want to show up on a web page written in short document, then you can certainly copy it into the pages by starting the document and selecting the text and copying 200 Loans For Government Employees this to the clipboard by pressing Ctrl-C. My laptop has an option to turn off the battery charger while remaining plugged in (and operating). Now, connect your ammeter with its in-line fuse across each side of the closed battery disconnect switch as shown in figure 5. With that, we urge VE Commodore customers that have been affected by the battery drain issue to contact their Holden dealership and arrange for the aforementioned works to be undertaken to ensure. negative) battery terminal. may want to check output. English If the phone is turned off when the charger is connected to the phone only the battery charge indicator will be shown on the display. A fully charged battery won't freeze until -76°F, while a fully discharged battery could start freezing around 32°F. Batteries lose charge over time and replacing them can be expensive. Disconnect the negative battery cable from the battery. I dont have this issue if car is parked at home (covered parking). If the battery is still strong, its the battery, which will take a charge, but won't hold it. Achuba, who also narrated how he was treated by the Police when his impeachment was announced on Friday, said, “I was in my official residence on Friday, all of a sudden, my power was disconnected. 7 volts when engine is off, it automatically DISCONNECTS the load. At 8PM last night it was at 262 miles -- this morning at 11am, it's at 243. Don't disconnect your XJ8 battery if you can help it. The installation of the new battery should be as quick as possible. Now the car is fine as long as you drive it at least once a week or run it for 10 mins after sitting for 5 days. Philippjordan and everyone else. Do not wiggle the cable clamps while the battery is recharging, because a spark might occur and this might cause an explosion. If you have it in storage disconnected from the car, a charge every month or two will help keep the self discharge from draining the battery. Alternater charges battery while driving but does not power the car if the battery is disconnected. A bad battery cannot be fully charged so will drain much faster than a good one. My issue is that with the battery located in the boot, I'm not sure what the best way is to do this, because if I'm going to have to start pulling fuses, it'll be a lot of running around. You cannot stop the drain except by disconnecting the neg terminal on the battery, and that means the PCM relearning the idle and trans shift schedule and you resetting the radio and EATC controls. Will playing the stereo radio in car drain the battery? Battery life in hours when runing a 22 in tv with out being charged? Listening to your stereo can drain your car battery. 5 as I left the multimeter connected. the charging system can act like one problem but it be another, i though my battery was the problem but it was the alt, and i've also had the opposite. Place the leads on the battery terminals, turn on accessories (ie. It's in the car. Sellers sometimes show incorrect stock as well as will in some cases let consumers purchase a product that is already out of stock; this is a specific issue on Black Friday, provided the speed of deals. It seems that many here charge the battery while it us still hooked up to the car. The next step is removing the battery. Not only can you watch the music video itself but you can also take in a one-minute clip of it on Apple’s YouTube channel. Meter read 11. the bolt carries the current when it's screwed in. Most common reason for battery drain? I've been having trouble with battery drain. I presume you have measured the current drain in a battery lead with everything switched off when you get the 130mA. The battery will not present too many challenges in most cases, especially if it's only 3-4 years. However, it's very bad practice & can be dangerous, assuming the car is negative earth/ground. There's always some current drain to the alarm circuit and the ECU. TravelBuzz - On Vacation -- Disconnect Car Battery? - How long does one have to be away in deciding to disconnect the car battery to keep it from running down? What is the prevailing thinking on this subject?. So the battery on my car would drain after only around a day or two if the car hadn't been driven. The "RV Battery Monitor" uses a ESP-01 and a ADS1115-4-Channel-16-Bit-I2C to read the voltage of up to 4 batteries. The accessory socket is located in the space formerly occupied by a car's cigarette lighter. In fact, your old battery probably did not need to be replaced, just charged which plugging in to an outlet at home could take care of. We bought a battery quic. However, it can be a defective battery and not hold a charge, having been charged, and left overnite without either post hooked up. com RV that this isn't always complete because something like the steps or a cab stereo may be wired to the chassis or engine battery. My wife drives a Honda Accord. We will need to disconnect the battery so having this code handy will allow you to gain control of your GPS and/or radio after you reconnect. This happened every once in a while, but seemed to be happening more frequently. 30pm and my battery was on about 70%. battery drains overnight. The best way to maintain a battery on extended holidays is to use a maintenance charger. The fact that disconnecting the battery doesn't seem to stop the drain makes me question if that is in fact the problem. Battery Drains While Surface Book is OFF and CLOSED I shut down my computer after using with 100% battery, close the lid, put it in my bag. A simple test to help you find why your car battery is always dead in the morning. Mystery fault causes battery to drain At just over a year old, a reader's Ford Focus refuses to start on a number of occasions after its battery drains. I have also tried having the type cover connected or disconnected when my device is turned off but the battery drain remains. For some apps, you can turn on Background restriction. I checked the battery itself at auto zone and the battery is good, also I had the alternator checked and it was at 30amps in neutral, is 30amps ok? The car has an aftermarket JVC radio with a sound system. 0 2018 Dead Battery. Start pulling and reinserting fuses while a buddy watches the. Disconnecting the battery terminals while the engine is running can. unscrew it and your ground is positivly disconnected. We couldn't even get the car to jump start so it was towed to a mechanic. Car Battery Do's and Don'ts. However, it can be a defective battery and not hold a charge, having been charged, and left overnite without either post hooked up. When I take it down to the woods by the river, which can be almost daily, I make about a 2 mile run round trip. Is your battery fully charged for winter? Let one of our techs check! If you have car battery drain on the brain, it’s time for a free battery check. While your fan is still running, disconnect the connector that has the yellow. If you have a preference that is non-negotiable like smoking cigarettes, keeping pets, or kids, you have to tell about this in the beginning just. If your car radio or alarm system needs a code to reactivate it after cutting battery power, make sure you know the code to turn it back on. Although be careful not to drain your car battery - so it is only really advisable to do this while the car is being driven. To my surprise the battery is always draining 1. The battery in a lawn mower has one main purpose: it provides the power necessary to. Here is is what I have done to ID the problem: 1. the bolt carries the current when it's screwed in. Three weeks later the new. Dead batteries - there might be hope! Don't give up! This will cause a battery drain by remaining in the "closed" position, causing the circuit to be completed no. Some people do it every 4-5 years, but your car battery might be good to go even after 7 years. For any longer, I would just disconnect the battery to be extra safe. If you want to attempt to diagnose it yourself, first perform a load test on the battery just to be sure that the battery is not an issue. No juice to drive fuel pump and spark the plugs. A marine (boat) battery must be removed and charged on shore. Battery Charger: Battery chargers plug into a normal 110 volt household outlet, and they charge your car battery while it is not connected to your car. Thinking I might disconnect the battery to stop battery drain and the alarm going off (not that it has) by accident. The next step is removing the battery. If you let your vehicle sit on the street or in a garage for an extended period, you may return to a dead battery or worse problems. With the wiring disconnected from the battery it read 10. If you have a spare quarter-million dollars—and who doesn't—then we have just the toy for you: the E. The lights were not left switched or left on overnight. Sellers sometimes show incorrect stock as well as will in some cases let consumers purchase a product that is already out of stock; this is a specific issue on Black Friday, provided the speed of deals. Don't disconnect your XJ8 battery if you can help it. When my RV is boondocked and we go away for the day I sometimes find the battery is dead when we return. Re: MUX/T TOW fuse draining battery **the short answer in this case was the key switches on the drivers and front passenger doors** but read on for a complete version. While this is one option to retrieve. In winter, in the cold, many people choose to use public transport instead of using the car or use a taxi service. I bought a $125 battery for it, and here I am two days later battery light on earlier today and car dies while driving tonight. It is typically recommended to disconnect the negative terminal because it is a somewhat safer procedure: If your wrench should accidentally contact the car chassis while doing so, it is no big deal, as the negative terminal is connected to the chassis, anyway. If the battery is going dead in two days, your are pulling at least an amp. I initially though it was a short. I checked the voltage while the car was. If it seems like your battery keeps dying while you're actually driving your car, the root problem probably isn't the battery. Pulled fuses while voltmeter on battery terminals - No significant differents. Check the voltage again in the morning. Read on, and learn about the 6 most common reasons that may suck the juice of your car battery. However, I do not think it is a good idea for the car engine to be running when doing so. Car Battery Goes Dead After a Few Days: This is my 2012 Hyundai Sonata. How can I stop it drawing power when it's turned off?. A in friend of mine simply installed a switch in the line, so that he can cut the power when he turns the truck off. Remove the battery, being careful not to let the positive terminal touch any metal part of the car. I now use an Optima battery tender on my yellow top while always connected to my Dsm and absolutely love it! I hope you resolve the problems your having!. If you want to attempt to diagnose it yourself, first perform a load test on the battery just to be sure that the battery is not an issue. The problem recurred several times. A marine (boat) battery must be removed and charged on shore. If the BATTERY DISCONNECT is off, the batteries are still connected and draining. Sellers sometimes show incorrect stock as well as will in some cases let consumers purchase a product that is already out of stock; this is a specific issue on Black Friday, provided the speed of deals. An average car battery has a capacity of around 48 amp hours which means that, fully charged, it. Some manufacturers use a separate lead from the batteries to the LP leak detector which bypasses the disconnect so that can draw the batteries down as well. My 2001 Buick lesabre the battery will drain down over night I've disconnected the alternator wires and plug I've pulled all the fuses one at a time and I still have a 12 volt drain on the battery I do have a sercurty light on but the car runs any ideals what the problem is ??. Made Easy Free Download PDF The Best Battery Desulfator Learn How To Free A Step-By-Step Guide Battery Reconditioning, Battery Desulfator. 5 volt potential or higher will result in a battery discharge. This video will show you how to do it quickly and safely, ensuring your continued auto maintenance safety. Re: Battery Drains While Boat Sits Disconnect all the wires off of the negitave battery cable. Car want start unless boosted, alternator good and battery good, while boosted the car crank in the key off position. The alternator may have loose belts or worn-out tensioners that keep it from working properly. How to Disconnect a Car Battery. We have found in a AllStays. The battery rapidly drains when the car sits for a couple of days. Under "Battery usage since full charge," see a list of apps with the percentage of your battery used.