Questions tagged [battery]

A rechargeable device most often made of lead plates covered in an electrolyte and protected by a plastic shell which supplies consistent electrical energy to a motor vehicle. Often referred to as an SLI battery (starting, lighting, ignition). Powers starter motor, lights, and ignition systems of a motor vehicle.

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1answer
26k views

How to diagnose low alternator output

My car (a 1991 Citroen BX 1.4) has been giving me alternator problems since I got it, the alternator failure came on every now and then and dimmed or disappeared when I revved the engine, my first ...
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59 views

Car that I drive regularly has flat battery, bad alternator?

A car that I pretty regularly drive everyday has just had it's battery run flat. I had just got back from a 30 minute drive and 10 minutes later tried to turn it on and it just kept cranking like a ...
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19k views

Does intermittent starting difficulty indicate alternator or starter?

Tl;dr: Car is having trouble starting, and I'm wondering how to determine if it's the alternator or the starter. I don't experience the longer turn over times of a typical starter malfunction, but I ...
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1answer
35 views

Can an OBD2 tester do a battery load test?

This Autophix device device was suggested by a review as the best of five battery testers. The text implied that includes testing cranking amps. But it can only connect to the computer—has no way to ...
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23 views

Why wont my car start

96 Chevy astro van My blower motor resistor shorted out and I replaced it. a test says my battery and alternator are good. I can still jump start my car. but it wont start otherwise. if i jump the car ...
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1answer
44 views

Left car battery “tipped” for a few months--is it safe to use?

A few months ago, I bought a new car battery and stored it sideways (silly me!) There's been a fair amount of leakage, which I've cleaned up. Is the car battery safe to use in a car? Is there some way ...
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1answer
38 views

Troubleshooting of Battery vs Alternator

it's been a while! Hope everyone is well. This might be kind of a dumb question but here we go: My car's battery light turned on a few days ago, then suddenly went off one day when I rode the car to a ...
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1answer
92 views

Car battery Confusion

The Battery provided to me in with the car is 60 Din (Ref C20 Capacity AH : 60, Charging Current A : 4) I’m looking to change my battery as its old and giving issues. The one which I want to go for ...
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4answers
58k views

how fast does the alternator charge the battery?

It would appear that the common word of wisdom is that car alternators provide 50A of output. I actually looked at the supposed specs for my 2008 Jetta 2.5L on the internet -- a compact car -- and it ...
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4answers
57k views

What are the risks of jump-starting a modern car?

I'm aware of the general risks, i.e. igniting hydrogen gas with a spark, and accidentally hooking up the leads backwards. But I have been reading conflicting information about whether one should even ...
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3answers
72 views

Fuel pump problem

My daughter's car, a Honda Jazz, have not been used for more than 3 weeks. We replaced a new battery as the engine failed to start. Even with new battery, the engine still failed to crank. We took it ...
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1answer
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What is surface charge and how does it affect battery testing?

I've read in numerous places that "surface charge" can give false positives when testing a battery, and you need to remove the said surface charge to get an accurate result. I've also read various ...
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1answer
79 views

Motorcycle Battery overheating, diagnosing the cause

After trying to start the bike for about 30 seconds to no avail, I found that the screws attached to the battery had become hot to the touch. Taking the battery out and testing it with a voltmeter ...
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2answers
168 views

New battery dead after 48 hours

My 3 yr old battery went dead and would not jump off. Replaced it. After 48 hours it was dead. Jumped it off. Held charge another 10 hrs. Dead again. Took to a shop. They replaced the negative cable ...
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1answer
74 views

2011 Honda Civic: new battery, alarm will not stop

2011 Honda Civic. Car was sitting for multiple months. Car battery was dead once tried to use of course, alarm was set when car battery died. New car battery purchased due to battery being bad. After ...
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1answer
37 views

What causes car battery to hold only 5v?

One of my cars was parked for a few months and it couldn't start after that. I could jump start the car and gave it some good drives (2hrs in total) to recharge the battery. However, that didn't help ...
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3answers
53k views

Why should I connect the red/positive terminal first when jump starting?

So, it's fairly popular consensus online that it's red/positive clips to the positive/red posts, then the black/negative clip to the frame One site mentions sparks, but you'll still get a spark when ...
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4answers
23k views

Jump starting a dead battery: Connect black wire to negative pole of battery or grounded metal?

Most of the advice I've seen for jump starting cars instructs to connect the black wire to a bare piece of metal on the car with the dead battery. However, I've always just hooked up both poles to the ...
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58 views

Replacing car battery, as soon as the terminals connected locks click on and off

I just replaced the car battery in a 12 year old Ford Focus, on reconnecting the terminals. The door locks continuously click on and off. Any ideas on the cause or suggestions for a fix ?
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1answer
43 views

Installed new battery not start [duplicate]

My Honda CR-V never have been any wrong or issues before. One week of extremely cold weather my battery died and I changed it with new one but no start, no light, no click at all. What shall I do ...
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3answers
6k views

How should I prevent my battery going flat when I leave my car alone for a month?

I will be leaving my Focus alone for around a month in (scottish) winter weather. Ordinarily I would make sure to take the vehicle out at least once a week to prevent the battery going flat in the ...
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1answer
642 views

Battery voltage confusion?

My car battery 45ah before engine start gives 12.6 Vol which means it is fully charged. Now, engine crank and the multimeter reading shows 14.4 v and continue to stay which simply implies that ...
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269 views

Is it necessary to clean underhood relay and fuse box from dusts?

A little history: My Chevrolet Aveo 2007 got into a strange state where it cranked, but did not start. It also had P0340 (Camshaft Position Sensor Code). Since, I did not see stable 12V on the Pink ...
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1answer
43 views

Parking brake left on

So I went to move my car this morning around two blocks from my house. My parking brake was on and I didn’t know. When I parked I realized it was on the whole time. It was driven for 2 block going 5 ...
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2answers
60 views

Will wrapping car battery with insulator help?

I always park my 2010 Honda CRV outside overnight. My place doesn't get freezing cold (usually around 40 degrees F) and it does get windy. Will wrapping my car battery with an insulator help extend ...
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2answers
3k views

Charging battery with battery charger vs jump starting and running the car

Got a 1998 Toyota Camry that has an empty battery and am wondering what the best course of action is. I have a battery charger that I am thinking of using but it's currently inconvenient to do. My ...
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1answer
70 views

What does the 'battery' light on the dashboard actually mean?

I know that when the battery symbol lights up on the dashboard it indicates a problem with the electrical system, which is commonly either an ageing battery or a broken alternator, but for the ...
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37 views

Ticking sound when stopping (for example at a traffic light or stop sign) and driving off again

I took my Hyundai accent in for a battery change the guy was quite rough when he was putting the battery in, so far so that he was weighing down on the air filter cover and trying to push the air ...
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0answers
95 views

BMW E46 320D Battery Replacement

My 5 year old battery is dying, and I'm looking for a replacement. When this one was fitted, the car wasn't mine yet. There's also no label on the top with some details. Therefore, I wanted to know ...
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0answers
45 views

Car not starting after week of sitting in cold temperatures

Three weeks ago I bought an '03 Honda Civic. It's been running well so far, but I let it sit outside without using it for a week and a half in 10 to -10 F temperatures. After this, the car wouldn't ...
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1answer
45 views

Should I replace wiring harness? If yes, how to do it?

My Hyundai Tucson 2013's fog light is not working. Also a bulb in cabin which is supposed to stay steady is blinking. I suspect this could be because of the voltage drops and electrical faults. I ...
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3answers
897 views

Cars With 2 Batteries?

Our 2008 Chrysler 300c has 2 batteries instead of the usual one. This is common on boats and RVs but not on cars. It has a large battery in the back far away from the starter motor and a smaller ...
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0answers
25 views

Car battery charger voltage

i have a car battery(74ah) 750a that i hooked up to a cheap 12v 4a car charger without any smart functions. At what voltage should i disconnect the charger when measured with a multimeter? Now it ...
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2answers
193 views

Can a defective starter stop my car?

Just before christmas my car died while my girlfriend was on her way to work. She told me that when the car stopped it went completely silent (no engine/lights/music). Since she drove for about 15km (...
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1answer
56 views

Car not starting, battery reading 12.5V

car wont start, had the same problem a couple months ago, but then it suddenly started. Came out this morning, car didnt start, almost got it starting but the starter motor didnt get enough juice I ...
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0answers
18 views

Motorcycle turns but won't start

I have a Suzuki Bandit 1250s. It was standing for about a year, after which I decided to ride it again. But it started giving a problem where it won't start when hot. The engine will turn like it has ...
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1answer
36 views

power drain and sometimes will not jump

Mercury Grand Marqui 2000. Had issue last winter with needing to be jumped on very cold days. Was fine in summer. This winter the problem returned so I bought a new battery. Still, when car sits for ...
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1answer
30 views

Mercedes-Benz battery charge warning light

I have a Mercedes-Benz model 2004 with V-6 petrol engine E320. On the dash-board a battery mark you can watch always unless you push the botton on steering wheel will disappear. And battery still ok , ...
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3answers
83 views

Do I need to change car-battery or retry jumping?

I didn't drive my car for months. Jump-started it once for a minor drive, but then didn't drive it again for a few weeks. All of this happened during cold winter. Now I jumped it again, with the ...
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0answers
13 views

What year was my ac delco 34ps manufactured [duplicate]

What year was my ac delco battery 34ps made bar code is 808709410638.
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2answers
14k views

Does a corroded starter drain battery?

I know a "bad" starter can drain battery, but am unsure what constitutes "bad enough" to allow a starter to drain the battery. Suppose a hypothetical coolant leak has corroded one's starter. Would ...
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0answers
30 views

AGM Dual Battery - Connecting only the negative terminal in parallel - battery leakage

I recently attempted to replace the starting battery (Battery #1) in a temporary dual parallel AGM battery setup. I had removed the starting battery and in the interim was relying on the deep cycle ...
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1answer
49 views

Lexus IS250 2008 won't start

Today, I tried to sell my Lexus IS250 2008. I turned the car on and drove to meet the guy. When I got there I let car on idling because I wanted it to warm up (heating was on, seat heating was on, etc....
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5answers
689 views

Why did a failed jumpstart work?

Sorry if this question is long, I am trying to include all the details in case that helps. My 2008 Honda Civic would not start after I had changed the brakes (left the trunk open and a door cracked so ...
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5answers
88 views

How many amps should my aux battery be charging at

I’m going to be installing a 2nd battery for all my lights and stuff, I want to be sure I’m not overvolting my battery. How many amps should my aux battery be charging at.
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8answers
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Will fitting a physically bigger battery reduce the working life of the alternator?

I have fitted a much larger 12v battery to a car. I modified the clamp and battery tray to make it fit securely, it's almost twice the size of the original and has a much higher CCA rating. It works ...
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3answers
806 views

Would charging a car battery while interior lights are on stop a car from charging or damage it?

Could charging a fairly modern car with lights on (or any other electronics on) damage it? My car battery drained to a voltage of 5.5V (very low I know) because I left the interior light on for 2 days....
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2answers
41 views

Trying to find an answer for my 92 Dakota not turning over

I've changed the neutral safety switch and checked the wiring from the battery to the starter and the it still nothing but i can start it off the solenoid and it runs like a charm any suggestions
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3answers
50 views

If a jump start didn’t work, will a booster work?

Car has been idle for several weeks and came to find it wasn’t starting up. Battery is 1.5 years old and first time it’s died on me. Tried to jump start it by commecting leads for some 15 minutes but ...
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2answers
83 views

Can you attach multimeter to battery terminals while car running/charging?

I cannot remember how but recently I blew the fuse on my multimeter. All I remember was the car was running when it happened. Can I attach the multimeter to battery terminals to check voltage while it ...

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