How Long Does A Car Battery Last Without An Alternator

Not so for the BMW apparently. An alternator is a maintenance-free unit. Generally speaking, you can expect your car alternator to last anywhere between 40,000 and 100,000 miles. It can take as long to charge the last 25 percent of a battery (orange area) as the first 75 percent (yellow area). 8 V with the car off is normal. You also have to. If you are still experiencing charging system issues, then the battery is suspect. Newer chargers may beep when charging or illuminate a light when charging is complete, but many need to be manually monitored and timed. With the motor running, and the alternator putting out power, the battery doesn't have much to do. It requires a good deal of energy to crank the car’s motor, and if a battery is not replenishing its power properly due to a faulty alternator, it will become drained and ineffective. The two charge controllers that you recommend are really just replacements for the battery isolator that I was going to install, but your alternatives are definitely worth considering. The researchers say this new method will let the Flow battery last an exceptionally long time compared to the current lithium. There's a full 12volts on the battery. I had a dead battery in May, replaced it, found the new one soon dead in June, determined the alternator was the problem, replaced the voltage regulator in July, and ran fine for three weeks. 3v at idle but above that at around 2k and up it would act normal aka why pepboys thinks its good. There are only a few ways an alternator can go bad, but they tend to happen suddenly without a lot of warning. Replace the alternator but the battery - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. If a dashboard warning light for the charging system comes on, that usually means the alternator isn’t recharging the battery. I have owned this truck for 18 years, and it has always lasted 4 years on any other brand of battery. A shorted diode in the alternator can still allow a charging voltage of up to 13. A lot of them just operate the load tester and say its ***** even if it was brand new. It is an original battery and I am mechanically inclined and know the battery was never replaced with 250,000 kms on car with original exhaust also. Money well spent IMO. Let’s assume ideal conditions: no high temperatures, no excessive humidity – in short, a perfect world for your car. Alternator Frequently Asked Questions. If your car does not start by jump-starting, you may have a problem with your starter, alternator or another component of the electrical system. It will not usually last the life of your car, though. Traditional battery isolators require you to modify the electrical wiring in your outboard to get to the alternator output. How the charging system works There's a detailed 32 minute video called Alternator in the video course. Running a car without an alternator. Gold Diehard battery (3 years replacement/100 months prorated warranty) failing after 27 months. Pop the hood and check the battery, and you might think you've found the culprit. For any car owner, this is essential information that you need to know to make sure that you won't end up with a dead car battery one morning. If the alternator was ailing for a while, the battery may have been low for a long time, which also isn’t good for a battery. How to start a car with a dead battery without jumper cables Last Updated: Nov. The average longevity of an alternator is seven years, or about 150,000 miles. Battery isolators also have a built in voltage drop so now your starting battery and your trolling battery no longer get a full charge. The battery on the other hand, will happily run the car and accessories on average around 70-90 minutes without the alternator, provided you don't have headlights or anything high-drain on. An alternator cannot sustain maximum output for long periods of time, it will overheat and fail. But in fact, I found that I got only about 5 amps of battery charging when my trailer batteries were low, and less than that when the batteries were charged to above about 70% of capacity. Complete Battery and Electrical System Check. Car Battery Life and Maintenance The lead acid batteries found in the majority of cars as with all batteries, has a limited lifespan. If this belt is broken or loose, the alternator is not working and you're running entirely on the battery (which won't last long). But whenever I am in Bangalore, I use the car every day. There are a number of factors that can affect your car battery, including humidity, temperature, and other environmental factors. Discovering you have a dead battery upon turning the key in the ignition is one of the most inconvenient, yet common, occurrences for motorists. What You Can Do When Your Car Battery Won’t Hold a Charge The best way to prolong your battery and to keep it from sulfating is to prevent it from happening. Average repair cost is $200 at 33,150 miles. 5 volts with the car off and 13 volts plus when running. Do you want it charged 100% or enough to start it the next time. Loosely, Amp Hours is how long the battery will last if it. My brother, who is a fair mechanic, offered to help me (I am pushed to my limit just changing a headlight). Inverter: Most inverters have a battery type switch that can either be selected to AGM for the closest setting to lithium or have a custom voltage setting that can be programmed to optimize your lithium battery. The charging capacity of the alternator and the quality of the connections. 6V with the engine idling. This type of battery is different to a normal car starter battery. It's a fast test and more importantly an effective test to find out if the alternator is in fact bad. How Long Will Alternators Last? The average lifespan of alternators is about 100,000 miles to 150,000 miles. When the battery gets full the BMS needs to shut off the charge. A greater difference of potential (voltage) between the battery's voltage and the alternator's output voltage will provide a faster charging rate. Charging the Battery. Without the alternator, your vehicle will die quickly. You would think that replacing a battery in a car would be one of the easiest things you could possibly do. It’s difficult to predict how long your alternator will last because many factors affect the life of an alternator. Ensure the drive belt is in good condition and does not slip on the alternator pulley. It provides more than enough power to do the job and it is inexpensive. While starters do sometimes fail unexpectedly and without warning, in most cases there will be some indications of imminent failure beforehand. If it does not crank it’s the battery, if it does crank it’s a current leak (or something left on like a GPS antenna). The time it takes to charge an electric car can be as little as 30 minutes or more than 12 hours. If the battery is fully charged, then yes it will, but not for long. The knight is the only pilgrim Chaucer ridicules. All I did was fill the tank all the way, give it a good wash, and disconnect the battery. It keeps the electronics going and battery charged. This is what is known as the cycling ability in a battery. I had to towed back to my apartment, and now I need to get it into a shop, but I'd really rather avoid paying for another tow (adjunct prof, and I don't get my first paycheck of. 8 reviews of A-1 Starter & Alternator "I am so grateful for the people at this place!!! I got a fix-it ticket from state police cause my taillights were out. Some would say it should last a good 5 years while others would claim you could very well extend it up to 6 or even 7 years. You can drive a damn long time if you have a solar panel on your car roof to re-charge the battery. Keeping the engine running without a battery, or with a dead battery installed, will likely burn up the VR quickly, melt the alternator wiring and burn out more than one electrical component due to high voltage - if run for very long without a working battery. Without a functioning alternator, the vehicle quickly uses up all of the battery's capacity, leaving it drained. When your car won't start it can be hard to tell if the issue is a dead battery or a bad alternator. I end up parking my car at the airport for up to a month at a time. The best option is to use the lowest current charger until you can. had alt and battery both tested and both were bad. Once your smartphone has reached 100 percent charge, it gets 'trickle charges' to keep it at 100 percent while plugged in. Story continues below. The car won't start, but the dash lights are on. Like said above average is 5 years. Pull the battery from the car and take it to your nearest auto parts store to be tested - they can determine if the battery can still hold a charge. Battery damage begins when the internal temperature becomes too high, causing it to gas and heat up. Although some batteries last much longer, most batteries begin breaking down chemically after four years, so you could experience dimmer headlights and other negative effects before you have a dead battery in your Cherokee that you need to replace. -- Cynthia. If your car doesn’t start, check out these tips for troubleshooting a car that won’t start. That's what the alternator does - it maintains the battery's charge and it produces extra juice to power the lights, radio and all the other electrical gadgets in the car. Car battery maintenance is a year round requirement, because it is very frustrating to find in a morning that your car suddenly can't start because of the dead car battery. See how you can find the source of the problem here. 500 Payday Loan Guaranteed. I was surprised to make it home with all the electronics. If you are driving on a motorway, you should be able to charge your car battery in 30 minutes. However, in professional tests, the number of amps doesn't always correlate with stronger performance. For a battery being charged by the car's alternator it can take an hour of driving to get it fully charged. You would think that replacing a battery in a car would be one of the easiest things you could possibly do. The glow plugs like a lot of juice, and often wont work right if the voltage is low. A car battery should last 6 or 7 years even with heavy charge/discharge cycles. If you suspect your battery is extensively damaged or are unfamiliar with the ins and outs of batteries and battery chargers, your NRMA is here to help. A car battery is designed to produce a large amount of current over a very short period of time to start a vehicle. Let’s assume ideal conditions: no high temperatures, no excessive humidity – in short, a perfect world for your car. The video above shows you how to replace the battery in your 2014 Jeep Cherokee. Seven minutes is no big deal though. If your alternator is failing, there's a good chance that you'll need to replace it. Headlights would be the big draw and in an emergency night drive in remote areas you could run with just the DRL on (no marker or tail lights). I chose to pay AAA to replace the battery. You know a normal car battery wont last long even with just 2 x 55W headlights and 4 x 5W park/tail lights- 130W total. 9 volts, then the battery cable is bad. The battery rapidly drains when the car sits for a couple of days. As long as the automotive electronics system is functioning properly, there should be no problem. So, without. When a car alternator is going bad, drivers will notice a reduced capacity for electrical use, often resulting in things like dim headlights. The alternator is a key component in running the electrical systems in your car. There are a number of factors affecting an alternator's ability to charge a battery, such as how much current from the alternator is diverted to the battery to charge it, how long the current is available, and the temperature. Pull the battery from the car and take it to your nearest auto parts store to be tested - they can determine if the battery can still hold a charge. So just charge the battery enough to start the car, go for a drive and the battery will probably be full in the time it takes to get to Teimo's and back. When you're buying a new car, it's hard to know exactly how long it'll last. An alternator typically lasts for 8-12 years, so it isn't something that has to be replaced as often as other parts like the battery. What's inside the battery makes a difference, not just what the rating says on the label. You can also measure the Open Circuit Voltage across the battery terminals with a digital voltmeter. It will not usually last the life of your car, though. A dead battery is your initial sign that something could be wrong with the alternator. The engine RPM won't really matter as anything from just above idle will have the alternator at full output. 0L Ford Explorer, Aerostar, or Ranger or 4. All batteries need to be maintained. My Toyota won't idle after changing the battery? battery is. Your vehicle’s alternator can keep a healthy battery charged, but it was never designed to completely recharge a dead car battery if the unit in question reads below 12 volts. do i need a new battery if my alternator started to fail and teh battery died? If the battery is dead then it can't start and can't charge the battery if it's not started. Typically you get BATTERY/ALTERNATOR VISIT WORKSHOP warning when the electrical system voltage in the car is below 12. A month later the new battery died. Cars parked too long can develop problems. Aside from a dead car battery, there are other signs of a bad alternator that aren’t as, well, extreme. If your car does not start by jump-starting, you may have a problem with your starter, alternator or another component of the electrical system. Avoid unnecessary sparks near the battery. Discovering that you have a flat car battery is perhaps one of the most frustrating experiences in life, as it never comes at a convenient time. When does a car battery need to be replaced? The main function of a car battery is to start your car. If you leave your door open and the inside lights stay on all night you could drain the battery down till the car won't start. A 12 Volt car battery can be safely used for this purpose, whether installed in a car or not. Their batteries are designed to make it only to the amount of warranty, and that's it. ARB Car Fridge Review - The ARB Series of car fridge will keep your stuff cold while you're out and about. functions temporarily. Without a functioning alternator, the vehicle quickly uses up all of the battery's capacity, leaving it drained. When your car won't start it can be hard to tell if the issue is a dead battery or a bad alternator. You have to have the car running to give things just an even chance. If the alternator was ailing for a while, the battery may have been low for a long time, which also isn't good for a battery. Some would say it should last a good 5 years while others would claim you could very well extend it up to 6 or even 7 years. It keeps the battery continuously charged and the car’s electrical and computer systems up and running. Now a battery's amp-hour capacity diminishes as the amperage draw increases, so you're looking at more realistically between 4 and 7 hours. Without your alternator, your battery would drain in a few minutes and your car would stop. It depends a lot on how much load you place on the battery, but by the time your headlights dim, you generally don’t have long; maybe two minutes tops. Battery Run Time: How Long Does A Trolling Motor Battery Last? By Richard C. 1v when it is turned on? You really need to know how much current it is drawing from the battery to work out how long the battery should last with it on. 2 volt output terminal. The problem comes when you try to restart the car. 96 Grand Prix SE (project car). When is it Time for a New Alternator? You may not know exactly what your alternator does or how it works, but you should keep in mind how vital of a component it is within your vehicle. A car battery is rechargeable. Share like your battery terminals or alternator. I had to towed back to my apartment, and now I need to get it into a shop, but I'd really rather avoid paying for another tow (adjunct prof, and I don't get my first paycheck of. But how much does it actually cost to fix an alternator? And for that matter, what is an alternator and what does it do? Keep reading to find out. RV and Marine Battery Charging Basics Posted on May 18, 2015 by Roads Less Traveled RV and marine batteries can be charged using many different kinds of charging systems, and understanding the way these chargers work can make a huge difference in whether or not you get the most out of them. Honestly, I could do this again. How long does a car last after it receives a jump-start because the battery is too discharged to start the car? It's a question often asked and we've read some absolutely terrible advice, such as driving a car for 10-15 minutes, which is not a good idea. A marine starting battery for example may have a cranking amp rating of 650 amps, but a reserve of only 85 minutes in which you can use accessories (depends on drain) before the battery is drained of the power needed to do the job, starting an engine. By turning a magnetic armature inside a wire field it will produce AC (alternating current) voltage. If this is the case, call for professional help. To do that you will need a boost or step up converter. Holden customer service said the battery Holden Cruze 2014: How long should the battery last?. Without battery power, your car, as you've probably noticed, won't start. If your car does not start by jump-starting, you may have a problem with your starter, alternator or another component of the electrical system. An alternator is a maintenance-free unit. While starters do sometimes fail unexpectedly and without warning, in most cases there will be some indications of imminent failure beforehand. The alternator is in parallel with both the battery and also system loads. there is not any fixing this. 15-30 minutes no accessories. PG&E has confirmed that the power has started going off in the East Bay, South Bay, and Santa Cruz county. Stage, when the hydrometer does not rise from your last reading the batteries are fully charged. This only discharges the battery by about 1-3%, which is then topped off typically by you vehicles alternator. Also if you do replace it make sure you get it registered to the vehicle. You also have to. sat up without being cranked or driven for about six months. A dead battery is your initial sign that something could be wrong with the alternator. I have a 2017 hyundai santa fe. I'll show you how to test yours without removing it from the vehicle and alternator replacement it if it's bad. 20-30 miles maybe. Several factors determine how long your battery will last, for example weather conditions, vehicle type and driving habits. Took it to a local car dealer who determined the battery was bad. My headlight cover had come off and was hanging by the wires. If you have the patience you culd disconnect one side of the battery after coming in. Once it can't be recharged, it's dead. What is a one wire alternator? How much amperage do I need? Amperage Load Calculator. Several factors determine how long your battery will last, for example weather conditions, vehicle type and driving habits. Alternator replacement can be done at a car dealership, an independent repair shop, or car-repair chains like Pep Boys or Sears. A car alternator draws power from and returns power to the car battery when the vehicle is running. 6l V8, and I'm wondering if anyone have some sort of estimate of how long time I need to keep my engine running, to charge the same amount of power that the starter took to start the engine. I used an amp meter to check drains on. make sure all the lights and accessories are off. See how you can find the source of the problem here. It worked fine after using jumper cables to start it and driving it to charge it up again. This map gives an indication of how long a car battery should last in different climates. When your car battery dies and you get a boost how long do you have to drive around. I had to have a friend jump me 3 times to get me to the garage, at night. If I drive 150 miles without lights, radio, or a/c, do you think I can make it? I might pick up a new battery at the Auto store just in case. I let my car sit for four months last summer. If your car will not start and you think you have a bad battery, alternator or starter, have your car inspected by a professional mechanic. Also if you do replace it make sure you get it registered to the vehicle. Also, if the battery itself is bad, an alternator in working order won't be able to charge it. The alternator, which is located on the engine, provides power to the battery and continuously charges the battery and the car's electrical systems and computers. Car Battery Drains Overnight. It’s a never-ending circle of dependence. Then I started it and went to work. An alternator cannot sustain maximum output for long periods of time, it will overheat and fail. A car battery is designed to produce a large amount of current over a very short period of time to start a vehicle. Significant high voltage transients can result from the car's charging system, particularly when subjected to intermittent high current loads. 5 volts to the battery which then sends out a stable amount of electricity to feed everything, I think unhooking a battery would "hopefully" blow out a fuse for the computer and all the electronics, if not it would fry alot of stuff by force feeding it high unregulated voltage. Do Big Stereos Need Extra Batteries? Customers often ask us if they need to add an extra battery or two when installing a large car audio system that includes multiple amps, speakers, and subwoofers? Deciding to add an extra battery is dictated by the system and how it will be used, and an alternator upgrade may be a more important consideration. If this belt is broken or loose, the alternator is not working and you're running entirely on the battery (which won't last long). How Long Does a Car Battery Last without Driving A new, charged car battery in good order should keep a high level of charge during two weeks without being charged from the generator. 1 volts, so no it is not a problem with the alternator. The battery is large and if in good condition will run the ECU a long time. If a bad battery is the culprit, your mechanic will help you. Alternator replacement can be done at a car dealership, an independent repair shop, or car-repair chains like Pep Boys or Sears. There are a number of factors that can affect your car battery, including humidity, temperature, and other environmental factors. However, even if you have a dead battery because of the alternator, you can still jump-start the car using the following method. Such like a car battery will get completely discharged during the period from 2 to 3 months. 2 volts, then start your car and rev the engine to 2,000 RPM. Generators I told her that you can start a car by jumping it but if there is no battery it will not run since the alternator requires a battery in order to produce electricity. A fresh battery and a malfunctioning alternator, however, will quickly leave you stranded again. It depends a lot on how much load you place on the battery, but by the time your headlights dim, you generally don’t have long; maybe two minutes tops. If your alternator fails, your battery will lose its charge since the alternator won’t be able to keep it charged up. You can test the battery with a voltmeter, and most auto stores have the facilities to check a suspect battery, usually free of charge. Your vehicle’s alternator can keep a healthy battery charged, but it was never designed to completely recharge a dead car battery if the unit in question reads below 12 volts. Inside an alternator the belt-driven rotor becomes an electromagnet when current is fed to it. Over the years, car manufacturers have learned how to minimize the possibility of a dead battery: by getting headlights to turn off by themselves, for example. The starting mechanical/electrical logic here is to prevent you from starting your car with shorted out alternator that is either seized up from a heavy, internal arc that caused the 120A ALT fuse to pop. Predictive battery failure analysis for the Prius Hybrid. If it does, the battery is undercharged and you were just seeing a surface charge that can't supply starter current at the proper voltage. Pop the hood and check the battery, and you might think you've found the culprit. It turns over, but won't spin. The engine had long previous. Today’s car batteries have the ability to store energy for long periods of time, often for many weeks, before they go flat. But, if it delivers less than 13 volts, the alternator will fail to keep the battery recharged. How long does a GoPro battery last? From 1. But starting the car and running the electronics inside the vehicle can deplete the battery. The good news is that 70 miles is more than enough to charge up the battery. A starter battery is designed to use a lot of power for a short period of time (starting a car). Basic Charging Methods. When your car is running the alternator helps to power the different electrical systems in your car and keep your battery charged. The last time my alternator went out my car made it about 30 minutes before it died, and every progressive jump only lasted 5ish minutes. She and her husband got into their car with their dogs and left until the fire, apparently started by a vape pen, was extinguished. If you are buying batteries that aren't lasting at LEAST five years, you need to get your batteries somewhere else. Does A Car Battery Charge At Idle, Or Does The Engine Need To Be At Higher RPMs Finally got my range rover started, left it idling for about 40 minutes, drove it around for about 15, and tried to start it — barely started. Car Battery Testing & Voltage It's important to test your battery and electrical system regularly, not just when it's starting to show signs of weakness. The charging capacity of the alternator and the quality of the connections. I chose to pay AAA to replace the battery. A series of diodes (6) convert AC to DC voltage which is needed for the car electrical system and the battery. 1v when it is turned on? You really need to know how much current it is drawing from the battery to work out how long the battery should last with it on. You need at least 12. It's difficult to predict how long your alternator will last because many factors affect the life of an alternator. There are a lot of electrical accessories and systems in your car, beyond just lights and stereo. The battery is still important since alternators require battery voltage to work properly, but the alternator is supposed to do the heavy lifting whenever the engine is running. Likewise, there are things you should never do to your car or. If you fully charged your battery in a battery charger each night, you could run your car fine without an alternator. This hour of work will save you about $100 in labor, and. An alternator charges a vehicle's battery. For one thing, the alternator’s rotor spins on a needle bearing, and this is a component that can break due to wear, or a buildup of dirt. Battery Chargers from Amazon. When your car won’t start, here are some ways to tell if you have a dead car battery or a bad alternator. IF: your under-rated battery is holding a charge and otherwise good and fully charged up and you disable as much electric load as possible, you should make it no problem. Use caution, however, as a dying battery can only receive a charge for so long and may go completely dead at a later point despite the best efforts of the alternator. Well it's relative really. So when estimating how long your car battery life will last, consider the climate you will do most of your driving in. no other labelling found so far. 500 Payday Loan Guaranteed. A greater difference of potential (voltage) between the battery's voltage and the alternator's output voltage will provide a faster charging rate. I will say this thoughI upgraded my system from an older powerdrive to a Terrova that is considerably bigger and has ipilot. But Sears says battery is fine (load tested after I had jumped it and ran it two hours) but Sears does not and cannot test cells. First, make sure that small children are in a safe area away from the engine while you are establishing how to jump a dead car battery. second way to do it is hook 10 gage directly to battery, then fuse near battery, 10. As good as an alternator is at replenishing your car battery; it can only recharge it to the point that it has a decent amount of life left in it and is able to accept a charge. Will the battery last that. Supposedly according to the owner of a. Today, most cars have a single maintenance-free 12-volt acid battery (in the photo). While this is the only solution for those people, there is another way you can save money and get a 100% functional battery. The alternator can put out all the amps it wants but its main function is to provide enough power to keep the engine running. If this is the first time that it has been discharged, you should be able to fully charge the battery and continue using it, but every time it is discharged below that threshold of 10. How Does It Work? An alternator works on the principle of electromagnetism. Alternator wasn't charging at all. What does Mercedes Benz warning light low battery conv. sooner or later its superb to get a leak fastened long till now this occurs. So how long does a car battery last? The ‘Normal’ Lifespan of Your Car’s Battery. Therefore if your battery is more than 4 years old and car battery voltage drops quickly, it is possible it has reached the peak of its useful service life and requires replacement especially if it does not hold a charge but. The voltage shouldn't drop below 12 V if you turn on the headlights. It should sound like a regular electric motor, no gravelly or strange noises. This is the EASIEST on car test for testing a BAD ALTERNATOR! If you've been wondering how to test the alternator on your car, this is the test to do. If it runs for hours after jumping, it's prolly the battery. I've seen some scoots come with batteries that can't seem to last more than a few months and I've even seen some very cheap Chinese scooters shipped with Yuasa (and other) batteries that hold up very well. Our intent with this post is to help you avoid some of the most common mistakes that people make when buying remote car starters. Alternator & Battery Basics What's that funny squealing noise that I hear for a few seconds after I start my car in the morning and why do I care? It's like this: The starter motor and alternator are electrical mirror images of each other. How does one tell the difference between a bad battery and a bad alternator? My car will not crank, but has some power (the dome lights, panel lights and power locks work). How I can drive car without alternator. I've fitted a new battery and new alternator but my car still dies. Re: How long will it run with a bad alternator I have run hours and hours off of just the battery after losing the alternator (bearings - what a racket it made) in a car. So just charge the battery enough to start the car, go for a drive and the battery will probably be full in the time it takes to get to Teimo's and back. Without the alternator, your vehicle will die quickly. I was surprised to make it home with all the electronics. Not so for the BMW apparently. Some would say it should last a good 5 years while others would claim you could very well extend it up to 6 or even 7 years. However, installing a used battery may buy you enough time to sell or trade your car for something else before the battery fails again. If you can, call out your breakdown provider. the alternator was charging at or below 9 volts. Generators I told her that you can start a car by jumping it but if there is no battery it will not run since the alternator requires a battery in order to produce electricity. 1v when it is turned on? You really need to know how much current it is drawing from the battery to work out how long the battery should last with it on. Although some batteries last much longer, most batteries begin breaking down chemically after four years, so you could experience dimmer headlights and other negative effects before you have a dead battery in your Cherokee that you need to replace. So how long does it take to replace an alternator? This is a common question with an easy answer. How long does a car last after it receives a jump-start because the battery is too discharged to start the car? It's a question often asked and we've read some absolutely terrible advice, such as driving a car for 10-15 minutes, which is not a good idea. As you may recall from last month's article on the function of generators in your classic car, there is no means of internally controlling the output of one. Country Boy · 5 years ago. 25 miles should be fine. How long should an alternator last? Alternators are generally trouble free - they can often last for the life of the car, and issues are especially rare on vehicles under 5 years old. see if your. All I know is that the engine battery gets through a winter without use much better if I give it an hour on the alternator every month. There are a number of factors that can affect your car battery, including humidity, temperature, and other environmental factors. I find that the electronics on my car draws down the battery in about three weeks. Alternator & Battery Basics What's that funny squealing noise that I hear for a few seconds after I start my car in the morning and why do I care? It's like this: The starter motor and alternator are electrical mirror images of each other. Say you find yourself in the middle of nowhere with a dead battery and no way to roll-start your vehicle. I need to drive 150 miles (hwy) on a full battery without an alternator. When the battery runs out of charge the car will no longer start, and there's not much you can do other than repair the alternator or have it replaced. The researchers say this new method will let the Flow battery last an exceptionally long time compared to the current lithium. The last thing you want is a 60 pound battery flinging acid all over the insides of your vehicle! Auxiliary batteries used in high-power applications should be SLI (Starting, Lights, Ignition) types, like the Optima RedTop ® shown at left, or the Exide Orbital ® shown at right. Take a moment to read the manual of your car. Thanks for your help. So what happens if your battery goes dead all the time, but the alternator seems good? Measuring electrical system leakage current. Do you think my car will make it without shutting down? Am I better off to just have it towed?" Driving a car with a shorted battery for any length of time, in some charging systems, can damage the alternator beyond function/repair. how long should a new battery last? Your battery needs to be able to handle the electronic demands of your vehicle, which are constantly increasing as technology continues to evolve. You have to have the car running to give things just an even chance. The alternator is in parallel with both the battery and also system loads. The reverse of that is that a partial charge will bring the voltage up dramatically, so that you may be able to start the car without waiting for full charge. Although some batteries last much longer, most batteries begin breaking down chemically after four years, so you could experience dimmer headlights and other negative effects before you have a dead battery in your Cherokee that you need to replace. A car's alternator is not designed to fully restore a depleted battery, but rather to. Even a good battery, because that's not what they are meant to do. How long can a car sit before the battery dies By Richard C. The best option is to use the lowest current charger until you can. why two? first attempt was with a kid that obviously hadn't used the machine much, if ever at. The simplest solution, of course, is to use the car's own existing circuitry to charge the car battery. Some would say it should last a good 5 years while others would claim you could very well extend it up to 6 or even 7 years. The alternator, which is located on the engine, provides power to the battery and continuously charges the battery and the car’s electrical systems and computers. What is the minimal voltage required for a motherboard's date/time function to work correctly? Life of battery (down to 0V):. The basic function of the alternator is to recharge the battery starter. When the alternator can not produce enough electricity to keep the electrical systems running and the battery will have to be used to take up the slack. I have a 2005 525i E60 BMW and in my research for replacing the battery I came across a tonne of conflicting information.