An automotive battery is a type of rechargeable battery that supplies electric energy to an automobile. Usually this refers to an SLI battery (starting, lighting, ignition) to power the starter motor, the lights, and the ignition system of a vehicle’s engine.

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Mk5 Golf TDI with battery drain and brake lights coming on on their own

I have a 05 Mk5 Golf TDI. I have to jump it in the mornings as its battery is dead, but it will last all day if I'm driving it. It will start straight up if I stop for a hour or more, but if left over ...
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2answers
40 views

Is it always the side battery cells that need topup?

Adding distilled water to my car battery, I've noticed only the side cells very short of reaching the meniscus. The most positive cell, facing the front of my '08 Jetta 2.5L (which has empty space, ...
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30 views

Car with floor-integrated battery pack

IS there any electric car with a floor-integrated battery pack other than the Tesla cars?
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1answer
70 views

Alternator draining battery

My alternator has been draining my battery in my Datsun 240z since I swapped the engine (VQ35). It takes around 4 days to drain the battery to the point I can't start it. It charges it fine when the ...
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1answer
42 views

Alternator/Battery power question

Good Afternoon, I have a 2014 Ford Focus SE that i use as my Work Vehicle. I work in Emergency Roadside Assistance. I have to run a laptop In the car in order to direct calls to other employees and ...
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1answer
16 views

2000 Jeep Cherokee 2WD battery light comes on

Hello I recently purchased a 2000 jeep cherokee, and I live in syracuse NY so the winters are pretty cold, so when I start it in the morning when its cold out, the serpentine belt and tensioner need ...
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1answer
21 views

Lexus IS200 malfunctions after wrong polarity battery installed

Yesterday I was sold a wrong battery for my Lexus IS200 (switched polarity) and I inadvertently connected it to the car. When I hooked up the wrong battery I noticed immediately that something was ...
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1answer
109 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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1answer
491 views

Mercedes ML 430 will not start. No click, no electrical lights nothing.

After taking a nap in the parking lot at my job, the driver's seat (power seating) -- the passenger seat did work-- I had laid back could not be readjusted. After work I went home (3am closing shift). ...
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153 views

Jumping car battery

Donor cables hooked up correctly receiving car cables reversed. Didn't start, smoked. Mechanice shop portable jumper then used receiving car again had cables reversed. Again smoked, didn't start. ...
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37 views

Can a bad battery damage voltage regulator?

I have a '91 Ford Sierra Saphire 2.0 OHC (pinto). Have been struggling with having no charge for weeks now. I've tried two different alternators, had one of them completely rebuilt by a professional, ...
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42 views

Honda Civic 2012 the car wouldnot open with clicker or with master key

After coming from vacation (11 days) my Honda would not open with key had to call CAA they open the door and gave a boost I am driving but the alarm light does not flush what my next step should be ...
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74 views

battery tender keeps charging

Results for: so I have a motorcycle and use the Optimate1 battery tender. One day while using the tender I left and came back 6 hours later to find the Optimate still charging my battery. The battery ...
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Hyundai Accent Diesel 2002 alternator works on day but not when headlights are on

I have purchased Hyundai Accent diesel 2002 four cylinder from my savings .. its start every morning but not at night when the car's headlights are on. I couldn't start it after one or two attempt . ...
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42 views

Nissan Altima Alternator/Battery Problems

I own a 2005 Nissan Altima which has been having alternator/battery problems for past 1 year. My car has 112,000 miles on it. My car battery was past warranty so I had the battery replaced about a ...
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0answers
17 views

negative surface charge?

At about 20°C, there has been a situation that the OEM battery in my '08 Jetta was not capable of starting the car at all (virtually no movement of the starter at all), after being used for at ...
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0answers
32 views

Nuts for 2008 VW Jetta SE 2.5L battery terminal bolts: 1/4" or M6?

I want to use an external charger to charge the battery in my US-market 2008 Jetta 2.5L SE with an OEM battery. I need to figure out which nuts to get to fit the existing battery terminal bolt, in ...
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0answers
7 views

Why has my battery gauge on my '94 Ford Thunderbird stopped working?

Today the battery gauge stopped working and the needle rests just before the 0. The car itself cranks, starts, and sounds like it always has. However, there used to be this intermittent buzzing noise ...
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0answers
18 views

2008 Dodge Avenger with new battery

I put in a new battery and two weeks later the car wouldn't start ...yet with a jump start it turns on. Why on cold nights the next morning the car needs a jump?
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100 views

Battery dead on 2012 Honda Civic

I have a 2012 Honda Civic. This morning the battery was dead. I had it jumped and it came on. I took it to AutoZone to have the battery checked; they couldn't check it because the machine said turn ...