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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25 views

Is it bad to Rev the Engine on a Hybrid Kia Niro FE / What Will Happen?

I have a 2019 Hybrid Kia Niro FE and I was wondering if it is bad to rev the engine on it. Also what would happen if I did rev the engine. Would the battery be used or would the gasoline engine ...
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1answer
160 views

Is a 13.07V alternator voltage too low?

I'm having some problems with a 2006 Mini One D (1.4 l diesel engine). About a month ago the alternator warning light turned on (it only turned off over about 4000 rpm). The belt looked good, so I ...
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54 views

Don't understand battery test results

My battery tested at 660A. Its CCA rating is 760A. Its 100 deg temp here. Shouldn't a good battery read much higher than 760 CCA at this temperature? Or is the test equipment compensated for ambient ...
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113 views

New batteries keep getting drained, any ideas of cause?

hyundai coupe 2.0 2006. Battery was fine for few years until it died few months ago. Replaced battery and it died within a month. Replaced that battery with same brand and it died within 2 weeks. ...
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41 views

What is this liquid/anything to be concerned about?

As you can see there is a cable with some syrup coloured gunge or whatever on it, on close inspection it actually looks like it’s coming out of the wire. The cable itself I think goes from the fuse ...
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34 views

Help diagnosing start up/battery drain problem

Ii previously asked this question New batteries keep getting drained, any ideas of cause? Sorry was not sure how to link question. Anyway I got a multimeter and here are my findings. Firstly the ...
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5answers
78 views

Is a battery charger worth it?

I have a parasitic drain on my car battery. I have a fairly old Ford Fiesta brought from a second hand garage a year ago. It has a new battery. I went to one garage who did a diagnostic test and said ...
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1answer
21 views

Assessing battery condition on an EV

I'm considering the purchase of a used EV (electric vehicle, with no backup internal combustion engine). From what I understand, the battery condition of an EV, and therefore its maximum range ...
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1answer
9 views

2016 chevy malibu battery

I have a 2016 chevy malibu i tried to start my car last tuesday it would not start light radio everything came on. got a jump it started 6 days later same issue it says in the dash service battery ...
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2answers
60 views

Is there a way for the dealership to revive a dying battery?

Long story short, 2 years ago, my wife brought her car in for normal servicing to the dealership. They told her the battery needed to be replaced. She said she didn't want them to replace the ...
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1answer
99 views

Jaguar xk battery dying?

My car (jag xk 2006) went dead when I left it parked for 3 weeks. Understandable. I charged it and all ok. I made the same mistake a couple more times. Then one day when I was pumping up the tires at ...
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1answer
54 views

Car takes multiple attempts to start - bad battery?

It takes me 2-3 attempts to start my car the last few days. Yesterday it didn't start at all (no noise, but the lights/radio worked) and started after I got a jump and pumped the accelerator. I'm not ...
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785 views

How to tighten battery clamp?

The ground (black) terminal clamp on the battery in my 2007 Mazda-6 has become loose to the point that sometimes the start motor will drain the whole electrical system before it engages. At that ...
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1answer
211 views

Should I replace the battery terminal clamp if some material is missing?

I recently had my battery fail on me and need to get a new one. While I was removing the battery terminal clamps I noticed there was a lot of corrosion. After I cleaned off the corrosion, I also ...
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32 views

S10 won't start

I have a 2002 s10 that won't start. I had work done to repair an oil leak, drove it home, and it died. Thought it was maybe the battery, which had, in fact failed. I replaced the battery, and it ran ...
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2016 Chevy Malibu start up problems

I have a 2016 chevy Malibu with about 84,000 miles. I just bought this car from the dealership barely 2 months ago. My first issue started one morning I went out to start it and all the lights and ...
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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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1answer
45 views

Hot battery, just sitting

I pulled the battery as it was acting funny, thinking terminal resistance was the problem. Even though it showed 12.5 volts sitting there, under any load it went down to 8, so had a dead cell or two ...
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2answers
64 views

Disconnecting a battery on a modern cars causes all sorts of problems?

I have read that disconnecting a battery causes all sorts of serious problems on a modern car. https://dannysengineportal.com/car-battery/ a) Is this article only talking about when the engine is ...
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1answer
36 views

Do you need to disconnect battery on older cars when not using car for prolonged time?

I read that you should disconnect a car batteries negative cable if not using a car for extended periods as this could lead to electrical devices draining the battery especially in new cars with a lot ...
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1answer
67 views

Do I need to replace my batttery or will it recharge by driving?

My question is different. That question is asking about how long to start the car, I’m faking about how long it should stay on after it’s started because it keeps shutting down again. I put a new ...
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5answers
55 views

What can cause a complete battery drain while plugged into charger?

I own an Aston Martin Vantage V8 stationed at Mallorca, which I use when on vacation. Last year, the car had a new high quality battery replacement. The car is plugged into a charger when parked in ...
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2answers
32 views

Using li-ion battery on motorcycle with existing minimum current draw

I own a Ducati 848 motorcycle which is well known for needing battery tender. Most of the owners of such bikes (along with their bigger brothers 1098) especially since they are not riding them every ...
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3answers
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Car battery at 11.8v in the morning and 12.5v after 20 minute drive bad?

If my group 48/H6 70AH 120RC Led Acid car battery is at 11.8v in the morning and 12.5v after a 20 minute drive is it bad? My van and battery are only 10 months old but I do frequently use the battery ...
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2answers
64 views

2006 Chevy Impala dying while driving

I have a 2006 Chevy Impala LS (flex fuel) while I'm driving the dashboard sends off a warning of "reduced engine power" as my car loses power and I lose the ability to use my gas pedal. Meaning that ...
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1answer
18k 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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1answer
58 views

Little/no charging but alternator and battery test good

For the past few months, and seemingly getting progressively worse, I've had a charging problem: both battery and alternator test good (checked via charger with alternator test mode and higher-end ...
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0answers
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How do I set the upper cutoff voltage for a car alternator charging the car battery?

With sustainability in mind, and trying to do something new, I am looking forward to charge my car battery using Solar Power, without making much changes to my car's electrical system. Basically I ...
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2answers
55 views

Trying to Figure all this out before I spend a lot of money

I have a 2008 VW Jetta 2.5L Automatic , Recently the battery was dead and my car would not start. I charged it up and got it to turn over and let it run for about 15 min on its own. and everything ...
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2answers
52 views

1998 Ford Expedition: Symptoms of dead battery while jumping

I'm attempting to get my 1998 Ford Expedition 5.4L V8 to start after sitting for a few months. Initially, the battery was dead, so I put it on my charger for a while. After the battery was charged I ...
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6answers
29k views

Mustang charging system warning light on, but battery and alternator both passed testing?

I have a Mustang that the battery light stays on. I changed the battery and the alternator was checked by Autozone, they said it was good. I need help
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2answers
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When you replace a car battery, would anything in the A/C system be touched?

Last year my A/C was fixed. Then winter came. Then I had to buy a new car battery and so I went to a mechanic[1] who I paid to replace the battery with a new one. My question is: When you replace a ...
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1answer
53 views

New battery shows white signal very soon!

Bought new SF sonic flash start battery and it's just a month old. It has 3 signals..green is ok, white is needs charging and red is contact dealers. I checked for battery indicator status and it's ...
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91 views

Why does my van battery have three terminals, and how can I replace it?

The battery in our (converted) 1991 GMC G2500 Vandura has a battery with three terminals, which I believe is now dead (reads half a volt with multimeter). I'm guessing the second positive terminal is ...
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1answer
75 views

Connected battery the wrong way, what should I do?

I connected the battery the wrong way on an old Toyota MR2 turbo. The interior lights stopped working, otherwise the car starts and seem to work, exterior lights work. How do I repair the interior ...
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3answers
8k views

The battery in my portable jump starter seems to be dead - is it ruined?

My portable jump starter is this one from Cen-tech: https://www.harborfreight.com/3-in-1-portable-power-pack-with-jump-starter-62306.html I've had it for about 12 months and used it a few times ...
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4answers
17k views

Can I safely upgrade to an AGM battery?

AGM batteries are capable of being charged at a faster rate, and may draw additional amperage from the alternator if it is not regulated. Many cars that come with AGM batteries have special charge ...
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2answers
789 views

Battery issues - Honda Accord 2009

I have a brand new battery and alternator my car runs fine. When I am idling in traffic the battery light flashes on and off and on. It eventually goes out when I pick up speed. I had Honda do ...
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2answers
198 views

Opel astra H 1.6 16v 2006 battery and check engine light

I have an Astra H 2006 1.6 16V, and battery light and "check engine light" came on so I took it to the mechanic (in Sweden). They said it was an alternator problem (which I also thought to be the ...
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2answers
2k views

How can I tell if a car battery that went completely flat is permanently damaged?

I've had a lot of electrical problems with my car, and a couple of times, the car battery voltage got drained absurdly low (like below 2V) for short periods of time. I gather that fast charging ...
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2answers
378 views

Battery or what?

A few years back I picked up a 1989 Harley Davidson Sportster. I t was originally an 883, then the previous owner put in a 1200 cc motor. He threw a rod, so he said and had to have the cylinders bored ...
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3answers
6k views

Renault Modus wont start

The car is a Renault Modus 1.4 16v Dynamique 5dr 2005. The symptoms are: Car wouldn't start last week. The car cranks but does not start. Push started the car in 2nd, engine starts. Took The car ...
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0answers
15 views

Battery light is on causing problems with audio system

I have a 2004 mustang GT with the 4.6L N/A V8 and I am having some troubles. My car had some issues about a month ago. And I had to replace the intake manifold the alternator the water pump and the ...
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0answers
48 views

Is 15 Volts too high of a voltage to run on automotive electrical systems?

Is 15 Volts too high of a voltage to run on automotive electrical systems? And if so, would filtering the current thru an old style voltage regulator work to lower it to an acceptable voltage ???
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7answers
7k views

How slow ( not zero) can a car engine run without hurting engine and saving on fuel

New cars have stop-start system (even though this has been available for a long time). My question is: why are car companies emphasizing shutting the engine down at a traffic light, rather than making ...
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1answer
83 views

What is this sounds? Car won't start

I've been having trouble with this car and keeping the battery charged. It's winter and the car doesn't get driven, lately I've decided to run it a bit every night. Tonight my wife tried to start it ...
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1answer
19 views

Delco 79PG 840CCA has a date of P107R. What does that translate to in dates? [duplicate]

I can not figure the date of manufacture on this battery. Please help!!! Thank you in advance.
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2answers
1k views

Electrical problem 2001 VW Golf: intermittent battery failure?

(This is my first question here so let me know if it is off-topic or not enough info provided, or otherwise inappropriate for the forum and I will delete it) I have a 2001 VW Golf which has started ...
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0answers
28 views

Battery Corrosion Buildup on Positive Terminal

Earlier today when I went to move my car, as I attempted to crank it over all the dash lights went out and didnt return. This has happened 3 times - this being the 3rd - since I've owned the car - I'...
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0answers
37 views

Car won’t start without a jump, and then shuts off when I touch the brake

2010 Sukuki won’t start unless I jump it, and when I put my foot on the brake it shuts off and will not start again. Turn signals and lights come on and the door buzzer buzzes.