How Long Does A Car Battery Last Without An Alternator







The knight is the only pilgrim Chaucer ridicules. So how long does a car battery last? The ‘Normal’ Lifespan of Your Car’s Battery. If you can, call out your breakdown provider. 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. The engine RPM won't really matter as anything from just above idle will have the alternator at full output. Car enthusiasts and experts have greatly varying opinions as to the actual lifespan of an average car battery. And if discharged, it will sulphate and that'll be the end of it. If the starter is good, the last likely culprit is a bad alternator. 0L Mercury Mountaineer isn't hard. Car batteries range from 40AH to 110AH, and alternators range from 45 amps to 200 amps. When you have a dead battery, a battery charger can be a lifesaver. 2003 Nissan Murano will do 2 hours on new battery, without charging. I nervously popped the hood, put the new battery nearby, go the wrenches out and found the size ahead of time. You will hear a clicking noise while attempting to start the car, and the engine will have difficulty turning over. Depending on how bad it is, you cannot drive very long with a bad alternator. Particularly on smaller motors whose alternators charge slowly. But how long can an alternator last from the time when the car is new? What factors contribute to this auto part's longevity? Luckily, there are many ways to learn more about this problem and other car part information. Vape juice can stay good for a long time!. Car batteries range from 40AH to 110AH, and alternators range from 45 amps to 200 amps. When we removed the battery from the car, I. A single automotive 12 volt battery can’t power a 12 volt heater for very long without being drained completely. 1 Amps current, or that it lowers the battery voltage by 0. We test about 150 car batteries year in and year out, generally 15 models every six months. To run a fridge, use a deep cycle battery. You would think that replacing a battery in a car would be one of the easiest things you could possibly do. honda civic hybrid battery. I chose the one you see pictured below. If you have a solar panel as we have, this should be able to provide this small leakage current as long as the days are not overcast as they have been of late. Once the engine is running, the alternator is what supplies electricity to the car's electrical systems. If your alternator is failing, there's a good chance that you'll need to replace it. second way to do it is hook 10 gage directly to battery, then fuse near battery, 10. Story continues below. A battery that’s kept clean lasts longer than a cruddy one. How long will battery last without alternator? This is the third month of my alternator and battery woes with the SDL. In this environment, a simple, internally-regulated alternator is usually more than sufficient to get the job done. Re: Alternator belt breakscar will go how far on battery? It depends on the vehicle I guess. Typically you get BATTERY/ALTERNATOR VISIT WORKSHOP warning when the electrical system voltage in the car is below 12. Story continues below. When your car won’t start, here are some ways to tell if you have a dead car battery or a bad alternator. If you're based in NSW or ACT, NRMA offers car battery replacement services in both states. I now use a photocell charger that I place on the dashboard. A typical electric car (60kWh battery) takes just under 8 hours to charge from empty-to-full with a 7kW charging point. How often should I replace my car battery? On average, car batteries last for three years with normal care and maintenance. If this happens, charge the battery out of the car to confirm it is still good. 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. But how long can an alternator last from the time when the car is new? What factors contribute to this auto part's longevity? Luckily, there are many ways to learn more about this problem and other car part information. "It's a hard-working part," says Jeff Gunning, service manager with highly rated Addison Auto Repair & Body Shop in Denver. 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. A dead battery is installed in a vehicle and re-charged using the alternator. In some cars, it can last for up to 10-15 years without any repairs. I've had starters, alternators, and batteries all test good, yet fail in service. Do I need a high amp voltage regulator when using a high output alternator? I need more power at Idle, what alternator do I use?. Does it fit into the trunk Unsecured Personal Loans Today of the car? In support of 9% follow through and Small Loan No Credit Check complete the actual planned. Charging a battery too frequently will result in a shorter life span for the battery. Their batteries are designed to make it only to the amount of warranty, and that's it. How Alternators Work. AutoZone also offers overnight battery charging for 6 or 12-volt lawn and garden, motorcycle and marine batteries. Usually, the problem falls into one of two categories: a dead car battery or a loose battery connection. I'll show you how to test yours without removing it from the vehicle and alternator replacement it if it's bad. You could also just charge the battery fully, then try to crank the engine for 10 seconds or so, without starting the engine, and monitoring the battery terminals (NOT the connections) with a digital voltmeter. 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. Other causes for a car failing to start are a bad starter or relay. Find out which inverter you need. How I can drive car without alternator. Failure to do so may significantly shorten the battery's life (this does not apply to Li-Ion batteries, which do not require conditioning). Make sure your battery lives through the winter with these tips. Without cell coverage, she had not received any warnings. My headlight cover had come off and was hanging by the wires. The alternator is a key component in your car's electrical system, turning the energy from the crankshaft into useful electricity to power your vehicle's electrical systems and to help the battery recharge. Car Battery Life and Maintenance The lead acid batteries found in the majority of cars as with all batteries, has a limited lifespan. 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. If the motor has not been run for a while, it always a good idea to put it on a charger before you take it out. The maximum charge voltage output of the Battery Tender ® Plus battery charger is in the same range and less than 15 volts. Newer cars are much more reliant on the battery/charging system, and many won't even stay running with a dead battery. 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. need help identifying to get started for parts. 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. When your car won't start, here are some ways to tell if you have a dead car battery or a bad alternator. AutoZone also offers overnight battery charging for 6 or 12-volt lawn and garden, motorcycle and marine batteries. Alternator: Most factory alternators will sufficiently charge our lithium batteries and do not require any changes. honda civic hybrid battery. functions temporarily. When does a car battery need to be replaced? The main function of a car battery is to start your car. When your car battery dies and you get a boost how long do you have to drive around. • Fluid leaks in the alternator or a tight belt can also cause damage to the alternator bearings, causing premature wearing. It can take as long to charge the last 25 percent of a battery (orange area) as the first 75 percent (yellow area). The electrical system of a motorcycle can be thought of in very simple terms. A lead acid battery discharges over time. Basically you should be thinking about how big a battery can you fit, and less about how small and cheap a battery you can get away with, now I know money does not grow on trees, however the larger the battery the less percentage wise you will be draining it each day, and the longer it will last for you, both in power usage (battery capacity. So how long does it take to replace an alternator? This is a common question with an easy answer. If charging system is not working properly, yes your air will not work up to par as it is disigned to do this to not drain battery completely. if your alternator is dead, your battery won't charge and your car will prolly die in short order. 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. honda civic hybrid battery The battery part number is on a decal on the battery box. ) some folks have to upgrade. It turns over, but won't spin. A battery's life is influenced by your climate. As long as the bottle is sealed with the cap firmly in place and the bottle is properly stored. You might notice that the battery cranks the engine over more slowly at times. Keep extra posts on hand so you can replace them instead of buying a new battery. Great little car. I want to get a new battery anyways since its over 8 years old. 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). If you’re unsure of what to do, contact your local Meineke Car Care Center for advice. This only discharges the battery by about 1-3%, which is then topped off typically by you vehicles alternator. She said the alt light did not go on during the trip, it was daytime, so no lights. 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. The flow of electricity from the battery to the engine and from the alternator to the battery are nearly equal. The alternator's job is to recharge the battery while you're driving once the battery has started the car. How to Calculate How Long a Battery Will Last. The life of your car battery depends on how long it can hold its charge, and is capable of being recharged. 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. Then there’s getting a battery that’s right for your car. Another Response Edit Watch your volt meter on your dash. It's difficult to predict how long your alternator will last because many factors affect the life of an alternator. You can also measure the Open Circuit Voltage across the battery terminals with a digital voltmeter. How long will diesel car battery last with no alternator. Factors like weather, battery type, age and use can affect if your battery lasts a good amount of time, or a long time. How long can you drive a car with a broken alternator with a freshly charged battery? [more inside] I picked up a POS car a month or so ago because my previous car got destroyed in a freak snow/hail/rain storm/flood (in L. I've had to do similar on a trip with my old suburban pulling a trailer back from Canada. About as long as having 10 x 100W driving lights on. Its superb to swap the engine. The charging capacity of the alternator and the quality of the connections. So I would ask how much power might a typical alternator be permitted to put into a car battery? I have a 1. My experience is that a standard sealed lead acid battery can be charged from flat so long as you don't try and start the car when the battery is in a flat state. If you fully charged your battery in a battery charger each night, you could run your car fine without an alternator. Battery charging can be a way to increase the longevity and performance of your car battery however, this is only true if the battery charger being used is compatible with the battery type. Depends what accessories you have on during your last drive. The simplest solution, of course, is to use the car's own existing circuitry to charge the car battery. If you are still experiencing charging system issues, then the battery is suspect. All you need to know how to do in order to replace a battery is know what the color red is and know how to use a ratchet. if your alternator is dead, your battery won't charge and your car will prolly die in short order. How long time does it take to charge a dead car battery? Charging a dead car battery takes between 4 to 24 hours for a full charge, depending on how many Amperes your car battery is charging with and the size of your battery. If history is any indicator, Tesla is unlikely to provide more than 2 weeks notice of the change to minimize any unnecessary impacts to sales of existing vehicles. It is always best to charge a dead battery with a battery charger prior to putting an alternator into operation. GENERAL THEORY. This hour of work will save you about $100 in labor, and. 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 can also charge your batteries outside of your car and leave the BC15BD plugged in to a power source for continuous charging power. What's inside the battery makes a difference, not just what the rating says on the label. However, it is important for you to be able to understand how long you can expect your car radio battery to last. There are a few variable involved. Then, another time I threw the alternator belt on a different car ('79 280-ZX). to your average car battery as a forklift service. This is unlike the sort you get in cameras, etc - older NiCads especially- , which don't like being recharged when not fully discharged. 5L V6 has the battery indicator on the dash and the charging failed. Theoretically, on an older car, you can drive forever once the engine is running, you'll just be without any electrical amenities in the vehicle. Your car’s alternator is a workhorse What does an alternator do? When your engine is running, the alternator charges the battery and supplies power for the vehicle’s electrical systems. Age matters. So my dad brings his car around to jump start mine and he's convinced that it's just the long period of not being used that caused the battery to lose its charge. What is a one wire alternator? How much amperage do I need? Amperage Load Calculator. Without the alternator, your vehicle will die quickly. The alternator runs 13. Several factors determine how long your battery will last, for example weather conditions, vehicle type and driving habits. We recommend changing the battery in Jeeps every 4 years. Without your alternator, your battery would drain in a few minutes and your car would stop. Car Battery Drains Overnight. Because an alternator that IS charging the battery will produce 13 (up to 14. Before you consider replacing the alternator, make sure the battery isn’t the problem. 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. When does a car battery need to be replaced? The main function of a car battery is to start your car. If this happens, charge the battery out of the car to confirm it is still good. How long does this battery last without losing its charge?. When an alternator is going bad, the battery drains quickly. Batteries list their reserve capacity, which describes the approximate time for which they can run without recharging, on the label or in the user's manual. I let my car sit for four months last summer. But, if it delivers less than 13 volts, the alternator will fail to keep the battery recharged. Read the article to find out what size inverter you need, what appliances you can run and how long your battery will last. First Time Installing Second Battery - i have a new optima red top 34/78 and I just bought an Xs power D 3400. The diodes in the voltage regulator can also fail, and engine heat puts strain on the alternator. The mower battery will either have a cable end, like a car, or most will have a bolt that goes through the cable end and terminal to hold the cable on. Most will do this for free and it will tell you what state your battery is in. Test your alternator using an alternator/battery tester or voltmeter. functions temporarily. The best option is to use the lowest current charger until you can. We’ve come across many cases that are due to the ignition system, a defective speed system, an overheated engine, a bad MAP sensor (that thingy that reads the air and fuel ratio). second way to do it is hook 10 gage directly to battery, then fuse near battery, 10. I now use a photocell charger that I place on the dashboard. A battery has a fairly high amount of reserve capacity and is designed to handle a situation like an alternator failure—if it is in fairly new condition. The alternator can put out all the amps it wants but its main function is to provide enough power to keep the engine running. Battery tenders are mostly used on recreational vehicles like boats, motor homes, 4 wheelers, motorcycles, etc. Another terminal "turns the alternator on", or provides a sensing voltage for the regulator: it generally gets 12 volts from the "ignition switch on" circuit. When picking up the car, it won't start (sat on the lot too long and had a dead battery) Salesman jump starts car and says you live a long ways off, the alternator will charge the battery. Supposedly according to the owner of a. Went to mechanic and they wanted too much so I went back to auto place and bought a remanufactured (OEM Denso was $300 and out of stock) for $115 and a new Serpentine belt. GENERAL THEORY. Each of these windings and/or diodes can fail, one set at a time. Dead battery or murdered battery, Automotive, 17 replies 2001 saturn not fully cranking, Retired Brands, 2 replies 99 Corolla battery voltage is 14. A dead battery is your initial sign that something could be wrong with the alternator. If your alternator is failing, there's a good chance that you'll need to replace it. To discharge, simply run the device under the battery's power until it shuts down or until you get a low battery warning. 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. If an alternator goes bad, it certainly can kill a battery. Depending on how bad it is, you cannot drive very long with a bad alternator. A car has managed to drive 1,100 miles on a single battery charge. Can A Toyota Prius Battery Last 250,000 miles? Have you ever wondered how long a Toyota Prius battery will last? We can help. How quickly can RACV Batteries replace my battery? RACV Batteries will attend your vehicle, test and if necessary undertake a battery replacement and have you back on the road, usually within the hour. A fully charged battery won't last 20 minutes with no alternator at night with the lights on. The knight is the only pilgrim Chaucer does not mock. Basically you should be thinking about how big a battery can you fit, and less about how small and cheap a battery you can get away with, now I know money does not grow on trees, however the larger the battery the less percentage wise you will be draining it each day, and the longer it will last for you, both in power usage (battery capacity. This hour of work will save you about $100 in labor, and. The engine had long previous. Following the figure is a description of the various components that make up an alternator, and a description of how each operates to keep the battery charged in your car. Using a car battery to run a fridge will reduce the life of the battery and it will eventually fail. How long can you drive a car with a broken alternator with a freshly charged battery? [more inside] I picked up a POS car a month or so ago because my previous car got destroyed in a freak snow/hail/rain storm/flood (in L. Avoid unnecessary sparks near the battery. 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. A car battery is designed to produce a large amount of current over a very short period of time to start a vehicle. Intoxalock devices have the simplest blow patterns and are accurate and reliable. You may be able to drive the car a short distance, if you can keep any unnecessary electrical systems turned off. I find that the electronics on my car draws down the battery in about three weeks. I have a scorpio car model 2005. You may not have heard of him yet, but you probably heard about the electric car company Tesla. 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. 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. But eventually every battery reaches the end of its life span and will need to be replaced. The battery rapidly drains when the car sits for a couple of days. If you plan on keeping your car for longer than a few years, you can expect to replace your alternator. All you need to know how to do in order to replace a battery is know what the color red is and know how to use a ratchet. A dead battery, one that won't stay charged, or headlamps and interior lights that appear dim can indicate that your alternator is possibly bad. There's a full 12volts on the battery. The battery rapidly drains when the car sits for a couple of days. If an alternator goes bad, it certainly can kill a battery. Let's take a look at how that powerful little box works: A chemical reaction puts your car in action: Your battery converts chemical energy into the electrical energy necessary to power your car, delivering voltage to the starter. Battery Chargers from Amazon. Avoid unnecessary sparks near the battery. But whenever I am in Bangalore, I use the car every day. To do that you will need a boost or step up converter. If it's not your alternator, and it's not your battery, then you need to begin the possibly long and painful process of troubleshooting your electronics. Fortunately installing a replacement alternator is not difficult. 20-30 miles maybe. Having gone through a number of batteries, I have found that it's attempting to start a car from a flat battery that damages it and results in the battery not being able to hold a charge. Edit Article. The basic function of the alternator is to recharge the battery starter. Loose cable or bad alternator or dirty. A month later the new battery died. 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. no other labelling found so far. Alternator wasn't charging at all. starting a car with no alternator? I wouldn't have thought the car would last too long without the alternator returning the charge to the battery to power these. honda civic hybrid battery The battery part number is on a decal on the battery box. 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. Can I make it? My alternator died on my new 928S and I'm stuck here in Austin. Every few days I need to jump it. The engine RPM won't really matter as anything from just above idle will have the alternator at full output. If this is not the case take care of the battery and alternator problem before going any further. ARB Car Fridge Review - The ARB Series of car fridge will keep your stuff cold while you're out and about. Loosely, Amp Hours is how long the battery will last if it. An automobile alternator is essentially an AC generator. 9 volts, then the battery cable is bad. Time for a Change. What does Mercedes Benz warning light low battery conv. 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. Depending on how bad it is, you cannot drive very long with a bad alternator. Alternator: Most factory alternators will sufficiently charge our lithium batteries and do not require any changes. I end up parking my car at the airport for up to a month at a time. An alternator charges a vehicle's battery. A starter battery is designed to use a lot of power for a short period of time (starting a car). My wife drives a Honda Accord. Namely the size of the battery and its general health. Once a car battery has been drained below a state of full discharge, the damage has been done. Car radio power is something not that many people think about. For more information, see this post. Starting batteries occupy the opposite end of the spectrum, being designed to provide quick bursts of energy, such as a car would use while starting. Your car battery is charged by your alternator. But these clues won't last long, because a partially charged battery usually has enough power to operate things like headlights and power windows, but will fail the next time you try to start the vehicle. I have been using a deep cycle battery in my SUV for far longer than this thread has been around. Predictive battery failure analysis for the Prius Hybrid. Theoretically, on an older car, you can drive forever once the engine is running, you'll just be without any electrical amenities in the vehicle. Driving a car will fully recharge a battery. Read on to learn some ways to determine where the cause of your problems lies. The isolator goes between the alternator and battery, keeps battery in vehicle from ever being discharged by camper, fuse goes in line to camper near isolator, 10 gauge goes back to 7 pin connector. Oh, and we flattened the battery any number of times while we were away, didn’t seem to affect it’s performance hugely. Without your alternator, your battery would drain in a few minutes and your car would stop. The engine had long previous. If your car continues to run with only the positive terminal connected, your battery is bad and won't hold a charge. Can a car, once started, drive without its battery? you're fine as long as the car is running (the alternator provides all the current necessary) but you're screwed once you stop, cuz you need. 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. had alt and battery both tested and both were bad. Fun fact, acording to that skill set, a dolphin can change your car battery. Without knowing some of the other answers to those questions above it's really tough to say how long a battery should last. to your average car battery as a forklift service. Several factors determine how long your battery will last, for example weather conditions, vehicle type and driving habits. Car battery life expectancy is dependent on a variety of factors although a typical lifespan is around 4 – 6 years. October 1, 2016. How long can a car sit before the battery dies By Richard C. Attempting to acheive 3,000 watts output from an inverter without the installing multiple batteries and a 250 AMP alternator will result in damage to your vehicles charging system. How to start a car with a dead battery without jumper cables Last Updated: Nov. 9 volts, then the battery cable is bad. My 98 draws 3. If it does not spin or sounds really bad, have it rebuilt. A series of diodes (6) convert AC to DC voltage which is needed for the car electrical system and the battery. A car with a fully charged battery and a bad alternator will run until the battery is drained and then quit. But the big battery is still going fine. I replaced the alternator and battery each more than once to no avail. Even with the best care, car batteries won’t last forever. When you have batteries set up in both car, you don't have to start your car in order to charge the battery but sometime you do when the battery is very low or it needs a lot of power!. You can drive a damn long time if you have a solar panel on your car roof to re-charge the battery. Basically you should be thinking about how big a battery can you fit, and less about how small and cheap a battery you can get away with, now I know money does not grow on trees, however the larger the battery the less percentage wise you will be draining it each day, and the longer it will last for you, both in power usage (battery capacity. A bad alternator will not properly charge the battery. Most batteries last about two to four years in hot climates and four to six years in cooler climates. Battery Chargers from Amazon. Generally speaking, you can expect your car alternator to last anywhere between 40,000 and 100,000 miles. coming from the alternator. or you can buy a $30 battery tender and leave it connected to the battery every night and it will probably be able to keep the battery fresh enough for every day. jumped it off. An alternator cannot sustain maximum output for long periods of time, it will overheat and fail. Whenever the engine in a car or truck is running, the alternator charges the battery and also supplies power to the electrical system. I do not recommend buying car batteries from AAA. A battery that’s kept clean lasts longer than a cruddy one. When a car alternator is going bad, drivers will notice a reduced capacity for electrical use, often resulting in things like dim headlights. Car Battery Tester - How to Test a Car Battery. Can A Bad Alternator Ruin A Battery? A bad alternator will lead to a dead (discharged) battery, causing a car not to start or run. This is almost 5 Amps per 24 hour period - the answer is to turn the supply unit off if you have no EHU available and you are not using the motorhome. If the battery is frozen, do not attempt to jump start the engine or recharge the battery. If two systems fail, then it puts out only 1/3 of its rated capacity. Cars parked too long can develop problems. The alternator cannot bring a very weak or dead battery back to life. (Page 1 of 4). Checking Alternator Voltage Output with a Multimeter. 3 litre 1988 Mazda 323 with a battery of about 45 Amp-Hours capacity. functions temporarily. Failure to do so may significantly shorten the battery's life (this does not apply to Li-Ion batteries, which do not require conditioning). To discharge, simply run the device under the battery's power until it shuts down or until you get a low battery warning. 8° C) without first removing the negative battery lead to protect the vehicle's electronics or electrical system. The magneto circuit was strictly AC, with no battery included. 15 minutes later it died. Batteries have a limited life-span of around 3-4 years. I'm not really looking for exact figures here, but more if it's 5 minutes, or an hour. My battery also conk out last week, when I forgot to off headlight. 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. A good alternator may indeed keep the engine running, but it was never a good test. Your car battery is charged by your alternator. Make sure your battery lives through the winter with these tips. Battery Cables and Clamps: Look for cables long enough to reach from the charger to your car's battery. Trailer Breakaway Kit Battery Charger 20011 Operating Temps, Current Draw, Type of Charging; I spoke with a technical adviser at Hopkins, the maker of this charger and he said the safe operating temperatures for this Trailer Breakaway Kit Battery Charger, part # 20011, is between -20 degrees and 140 degrees Fahrenheit. 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. You might notice that the battery cranks the engine over more slowly at times. The correct fully charged specific gravity of your 6-volt deep cycle battery is: 1. But an alternator does not need power from the battery to charge the battery. Although it is possible to recharge a battery without the alternator, the battery will probably not be powerful enough to make it far without the. How Does It Work? An alternator works on the principle of electromagnetism. Share like your battery terminals or alternator. How long does a car batter last for without a alternator?An acid battery is supposed to be charged continually and it would not live long if it. What does Mercedes Benz warning light low battery conv. What Is an Alternator? When you go to start your car, your battery provides some of the initial power necessary to get your engine running. Not so for the BMW apparently. If your alternator fails, your battery will lose its charge since the alternator won’t be able to keep it charged up. my understanding is without a battery [dead or alive] to complete the circuit the engine won't run - I'd do a proper static and load test of the battery before pulling the alt, although it may well be a bad alt.