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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31k views

Battery acid clean up

I was carrying a battery in the floorboard of the backseat area of the car. I was going to return it to be disposed in a week. In the meantime, it tipped over and a good amount of the battery acid ...
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35 views

everything electrical works until i start my 2003 mercedes C 320

Everything works fine with the key in acc. position, but when I start it every thing stops working. No lights, no radio, no heater, no nothing. Any thoughts?
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Battery voltage drops to 0 when high load and then recovers

Morning. I took the car to the mechanic for a bearing change and to change the airbag clockspring. The mechanic told me he would see if the car has any electrical problems before changing the ...
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AC Delco | Should this be worrying me? The battery is just 9 months old

Should this be worrying me? The battery is just 9 months old.
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How to charge a 2nd car battery from the car?

I'm going on a camping road trip and need to power my CPAP. Instead of running one long cable from the car, which has its own issues, (dead battery/car, shorts, tripping) I want to get a 2nd car ...
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11 views

AM6 charging problem

I have an Aprilia MX50 (2004) and -although the engine runs perfectly- the charging voltage is low (around 4-6 V and it should be 13-14 V). I tried with another generator (the flywheel was still the ...
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3answers
55 views

Maintenance - Battery charging under abnormal low-usage conditions

Background Due to the recent coronavirus lockdown, my car hasn't been getting the mileage it's been used to. For reference, it's a 2007 Mercedes E280, with the 3.0L 6-cylinder turbo-diesel & 7-...
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Car goes silent when I turn the ignition key

I have a 1970 Chevelle. The last few times I have tried to crank the car, I had to jump it off. I charged the battery and this time when I turned the key, the dash lights came on then as I continued ...
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34 views

Total Electrical failure Mondeo 1.8tdci 2008

While charging a flat battery all on the Mondeo all of the electrics failed (lights, dash, not starting, Windows, ect) when I installed a new battery on the Mondeo still nothing. Any ideas on what ...
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1answer
33 views

12V AGM battery charging voltage

I have the following 12V car battery: Varta Silver Dynamic AGM 595901085 (12V/95Ah/850A), and the following car: Jaguar S-Type 2.7D. In the technical cars manual it says this: So in cold winter ...
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76 views

Is there a way to reliably test voltage of a 12V battery when it's not disconnected (i.e., partly loaded)?

I'm having an issue where a fully charged battery doesn't necessarily report the proper voltage when checked from the socket within the car, because in order to have the socket activated, the car has ...
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What happens if I disconnect the battery while the car is running?

There are some comments on the question Are there any modern diesel engines that require electricity to continue running? suggesting that disconnecting the battery while the car is running can damage ...
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129 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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Car Battery Charging Current & Car Battery Confusion

Confusion Regarding Car Battery and Charging Amps What is charging current in Car Battery : If both the battery’s have Ref Capacity - 68, But 1st Battery has a Charging current of 4A and the 2nd ...
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67 views

New ish battery, new alternator, battery light stays on (dim)

Battery was replaced 7-8 months ago (Interstate batteries brand) Got new alternator today after car died When picked up, battery light was faintly glowing Mechanic said everything was fine and it's ...
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Welding on car - damage to ECU, battery, alternator?

I had to weld nuts to the outside of rounded-out allen type bolts when removing 15-year-old rear brake calipers and carriers this weekend. As I was laying under the car welding (probably running ...
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1answer
51 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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862 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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1answer
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3.8l v6 Mustang 2004, randomly won't start but disconnecting and reconnecting the battery works

This problem has occurred 3 times now, so it is a running trend. Every time it occurs, it goes like this: I get in the car, insert the key, push in the clutch, and turn the key all the way to start. ...
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51k views

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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2answers
43 views

When jumpstarting a car from another car can one connect the chassis of one car to the chassis of the other car? [duplicate]

When jump starting a car A using a car B, can one connect the chassis of both cars together instead of connecting the negative battery terminal of car B to the chassis of car A. In theory this seems ...
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1answer
34 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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39 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
321 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
102 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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1answer
51 views

Brand new lead acid car battery reads only 12.33v. Is it faulty?

Yesterday I purchased a brand new, maintenance-free, 12 volt lead acid car battery. Specs: 47Ah and 450CCA. Before I install it in my car, I measured the voltage with a catIII digital multimeter. It ...
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1answer
67 views

Using a device with external power and receive data from the CAN bus

I want to keep a device in always on situation in the car. I do not want the device to drain the car battery. The car is used at least once in two days and the current consumption of my device is ...
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2answers
48 views

if my alternator was tested and functioning properly why does my battery and brake light keep coming on in a 08 Nissan Altima 3.5

started my 08 Altima and put it in gear and it didn't have the power to go anywhere and then the car just died. bought a new battery and everything worked fine. now my battery and brake light on the ...
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1answer
48 views

S10 won't crank

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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1answer
23 views

93 Seca 2 Wont start without a jump, battery good?

So i have taken the battery out and had it tested at autozone and they said the battery was fine. the solonoid is fine because if i hit the starter the motor starts to act like it wants to turn but ...
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1answer
14 views

2011 Lexus RX replace with smaller-than-OEM-dimension battery

My vehicle is 2011 Lexus RX, and I replaced the new battery at https://www.amazon.com/gp/product/B000MS9VZK/ref=ppx_yo_dt_b_asin_title_o05_s01?ie=UTF8&psc=1. The new battery dimension is smaller ...
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1answer
41 views

Electrical problems after jumping 2008 chevy silverado

After jumping truck, my stabilitrack light stays on, service brakes light stays on, and my radio does not power off when key is turned off (or when I open door). Not sure where to start to locate the ...
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47 views

Battery backup for radio

Hello all looking for some advice on a stereo I am building for my house. I have a car stereo, amplifiers and speakers, all powered by a 12 volt power supply. Everything works great, except I loose ...
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2answers
109 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
112 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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2answers
72 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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3answers
43 views

jump start car with battery disconnected [duplicate]

so this car won't start from a jump starter pack. I also tried leaving the pack in place for an hour to charge up the battery for longer before starting. I am thinking of disconnecting one cable from ...
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1answer
739 views

Battery Positive Post Meltdown

On a series of 6 inline 8 volt batteries, what causes the meltdown of the positive post on one of the batteries? Within the last two years we have had to replace 4 batteries in our golf cart. Thanks
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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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1answer
73 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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2answers
27 views

12v car battery isolator switch keeps blowing

I've got an Audi TT MK2 2.0 TFSI which I'm preparing for track use. I want to fit a battery isolator switch as it will be sat not being used for long periods of time plus I think it's sensible for ...
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3answers
57k views

Getting information from manufacturing code on Exide car battery

If you can help me decode the following manufacturing code on EXIDE EA640 battery, especially which production plant has made it what was the date of manufacturing Code: 3EC28K5 Perhaps 28K means ...
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1answer
19 views

Upgrading Honda Accord Group 51 battery to a larger one

Ive a 2010 Honda Accord. The manual recommends a small group 51 battery (that's OEM as well) providing 500 CCA. Various websites say to upgrade to a Group 35 or 36 providing 650 CCA. In Chicago, ...
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1answer
45 views

Why does my truck turn off

Hi I have a 2000 F250 truck and I am experiencing difficulties keeping it started . So my question is when i jump it, it's fine as it's in park but when I go to put it in gear it shuts off? Or when I ...
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2answers
1k 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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0answers
26 views

Replacing Chevy Cobalt battery

I have a 2008 Chevy Cobalt, battery in the trunk. The battery was replaced with one without a hose. Do I still need to attach a hose and where?
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2answers
311 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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3answers
57 views

Portable car battery booster pack - choosing peak A vs Ah

After adventures with dead battery, jump starts, and headaches, I just replaced my car battery (it was only 6 yrs old.. :( ). I am considering a portable booster pack to keep in the car, and had a ...
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1answer
37 views

powered window and back windscreen wiper anomaly

At first i thought it was random, then i realised that there is clearly a pattern: I start the car then i check and both the wiper and the window works as expected. 20-30-40 minutes down the road i ...
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What's the lowest voltage I should accept on a brand new 12 volt AGM motorcycle battery

I recently purchased a brand new 12 volt AGM motorcycle battery. When I got it home I measured it with my volt meter and it read 11.81 volts. I took the battery back to the bike shop and tried to ...

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