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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15 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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Led strip flickering?

Connected a pair of led strips 12 v from car 12 v battery. It starts flickering when engine running, and gradually goes to constant brightness as rpm goes high. However, the light stays constant or ...
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Car is dead, but battery is (apparently) fully charged?

My car seems to be completely dead (no dash/radio/lights/ignition/key remote lock) but after testing with a battery charged apparently the battery is completely full. I've tested while connecting to ...
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Why does my car shut off when put in reverse

I have a 2014 Hyundai Elantra, that i have owned for a little over a year now. It has been very well maintained in the time that i have had it. The other day after i finished pumping my gas, i got ...
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What causes batteries to explode [duplicate]

I have a 2014 Hyundai Elantra, that i have owned for a little over a year now. It has been very well maintained in the time that i have had it. The other day after i finished pumping my gas, i got ...
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4k views

Why put copper in between battery contacts and clamps?

We have bought a used Toyota Yaris. Yesterday I allowed my kids to play in the car, and they discharged the battery... So I went to take it out to charge it up and I found pieces of a copper and ...
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66 views

Why starter needs two positive connections

So from schematics or youtube it is clear that car electric starter is connected to battery positive terminal with two connections: one is always connected to battery (B wire) and one going through ...
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3answers
328 views

What's the difference between 2 A and 10 A charging options?

My battery charger has a 2 A and 10 A option. What's the difference? If 10 A is more and faster, why not just put the 10 A option?
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47 views

Modifying air conditioner to run without key inserted? (fan only, not temperature regulation)

In our Volkswagen Touran, I have already modified the fuse box in a way that the auxiliary 12V power outlets always deliver power, without ignition enabled, by connecting two piggyback fuse holders ...
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Activa 4G Exide Maintenance Free Battery Issue

Battery is fully charged but not taking self start properly.. Service centre or Local battery seller suggested to replace with a new battery although horn and indication lights are working fine and ...
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19 views

Alternator sudden voltage drop after engine running for 2 minutes

My battery lamp in the gauge cluster turns on after the car have been running for approx 2-3 minutes. I have measured the voltage and when I start the engine and when it's running for the first 2-3 ...
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3answers
56 views

Can I keep a second car starter battery around as a backup?

I replaced my <1 year old car battery with a new one during troubleshooting, but the actual problem I had was the alternator. So now I have 1 new car battery and 1 used but good battery (and I can’...
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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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Can I use a battery isolator and have a lithium battery and lead acid battery charge off of the same alternator?

The lead acid battery is for a high current application (650 amp @ 3 min max) and the lithium is a house battery. The lithium is a 12.8v nominal. It charges to 14.6v then the BMS cuts off incoming ...
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Alternator dying so junk car?

The alternator store rounded the bolt on my alternator so I can’t get it off my 2004 g35x. I changed the belts (there are two one for ac and one for alternator) since I did that the car has a voltage ...
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21 views

Smoke from one of the acid holes of the battery

I have a car that I don't drive frequently, so once or twice times per week I turn on the car, but sometimes I can't turn on the car so, the battery is discharged because of the time not being turned ...
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2answers
34 views

Hybrid battery not charging fully

I have Toyota Estima 2.4 petrol/electric hybrid 2010 (UK 60 reg) that I bought about 4 months ago. So far I had no problems with anything until a couple of days ago the HV battery stopped charging ...
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Car seems it won't start but eventually does

My car is an Opel Corsa B. Recently, it started having trouble to start. When I turn on the key, the car behaves like the battery is empty (slow cranking -low choking sound- of the engine and the ...
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2011 Chevy Cobalt. starting problem

How do i tell when battery is charged. It reads 7.4 % right now on battery charger. My 2o11 chevy cobalt got the keys locked inside and drained battery after i got the keys out of the car . I tried to ...
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1answer
28 views

2002 Mercury Mountaineer V8 4.6 2W Drive

While driving on freeway going 75 MPH using cruise control, my engine stops running. I still have lights and power but no power steering or power brakes because engine was off. I put it in neutral and ...
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52 views

How can a battery indicator be on when the alternator is providing adequate voltage?

I'm under the impression that the battery light indicates that charge is flowing "out of" the battery. Normally the battery is being continuously overcharged by a couple volts, meaning that electrons ...
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48 views

What happen if I connect car battery wrongly?

I have a Renault Clio car. I replaced my car battery with a new one. I tried to start the car but it's not worked. After it makes a smoke from the engine side. Finally I see I had connected the ...
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1998 Volvo S70 horn alarm after reconnecting recharged battery

1998 Volvo S70 sits a lot. I had recharged the battery disconnected from the vehicle as the charger initially indicated a "fault". Upon reconnecting the battery the vehicle horn alarmed ...
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Exide battery date code [duplicate]

I have an Exide battery with this code stamped on the battery top edge,5LC06E2. Is this the date code .If so when was the battery manufactured
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4answers
58 views

Bad battery, or something more?

I have a 2005 Ford Freestyle, I’ve been doing a lot of front end work on it and had the radio on In it one day for a substantial amount of time, maybe 6 hours. Needless to say it died and later that ...
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1answer
16 views

2003 Mazda Tribute lost power

I have a 2003 Mazda Tribute with the V6. The battery light will occasionally come on, sometimes it just flashes, other it stays on. I had the battery and alternator checked at two different auto parts ...
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38 views

Charging two 12V batteries wired in series by two car alternators

I have a spare engine sitting around and i've been planning on building a 220V generator from it. I'll be using an old UPS device which uses two 12V batteries wired in series to make 24V and connect ...
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1answer
332 views

Battery dead, 3hrs later fine as usual.Why?

After letting my car sit for 10 days, it seemed the battery was almost empty. It did crank, but you could count every... sin...gle... comppp...ression. The lights got dim with each try, and the clock ...
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1answer
24 views

Why is my car battery charger not powering on?

I've had my car battery charger for about six months and, just recently, it won't power on. When I connect it to the battery and the mains, the orange light comes on but there is no low humming noise ...
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2answers
28 views

Drain battery time?

I'm gonna install a camera system in my car and it takes 12v/2a. (12v/1a times 2... it has 2 devices that run 1a each) How long would that take to drain the battery if the car is powered off? I was ...
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Mazda 6 TS 2006 petrol rev problem

First ever post on here and I’m not very car savvy at all so please forgive the lack of proper terminology, a bit of background first; I bought this car in October of last year and it was going okay I ...
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1answer
36 views

Will a battery designed for northern climates perform poorly in hot weather?

I need a new battery and was recommended this battery. The product page says the following: Designed specifically for Northern climates Pretty much the only place this battery won't fit in is ...
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1answer
17 views

hyundai coupe 2005 replaced battery and horn, indicators and wipers on constant. will not start

Car wont start after battery replacement. Horn blowing constantly. Also indicators and wipers are on constantly.
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126 views

Acceptable battery voltage drop overnight

This is a follow up to this question that I asked previously. Since asking that question, I have kept my same commute, but have been driving consistently 30+ miles on the weekend. In addition, I have ...
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39 views

Can a battery charger damage your car?

I have a 2013 Mercedes SLK that would not start one day due to a dead battery. I called Mercedes Roadside Rescue, they came out and gave me a jump with a battery charger. Right after that I got an ...
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1answer
25 views

Grounding auxiliary battery & load

I’m planning to add extra deep cycle battery to my RV. It will be charged by the alternator safely by an isolator. I’ll use national parks’s power outlets to charge it. My main concern is the ...
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12 views

Battery drain suspected from door locking system

I have a Mitsubishi L300 van 2005 and one of the doors is not closing properly, hence the light of "opened door" is constantly on. This drains my battery in two days, which I suspect that is way too ...
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Battery issues?

I have installed remote central locking unit and autoclose windows module successfully after close consultation for your advise..... Now, I bought new battery 45ah rating (just 3 months old) having ...
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2answers
81 views

ABS and Brake light fault after battery disconnected

I bought a new battery that ran flat after two weeks. Took it back to the garage and they disconnected negative from my battery whilst the engine was running to check my alternator but now I have ...
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1answer
40 views

Smoke at post when jumping also is sparking at post when hooking up a short

Trying to jump truck. Battery post started smoking. Is that because cables were rusty and if you see spark on post when hooking up is that for sure a short?
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99 views

Minimum driving miles to keep battery charged (Honda Civic 2015)

I have a 2015 Honda Civic and I got a new battery for it about six months ago. Recently the car hasn't been starting and required jumps every morning to run. I took it to the dealership and they let ...
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1answer
41 views

Deionized water for batteries and radiators

Confused! Auto parts stores sell deionized water for auto use only; claiming they are prepared solely for this use. Not for human consumption. What do they do differently after making DI water? Are ...
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93 views

Honda Fit GP5 Hybrid battery not charging

Last two days in my Honda Fit GP5 (2014, hybrid, 1490cc) I noticed engine isn't stop when car is in parking mode and hybrid battery meter doesn't get over 3/6 even though engine was on for half an ...
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19 views

Battery replacement

I have a 2014 Mercedes Benz 4 matic. I swapped the battery in the front and my car started fine and I also swapped the auxiliary battery in the back and now the car won't do anything. It won't start. ...
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64 views

What does this clicking noise mean when trying to (unsuccessfully) start my 2004 Lincoln Town Car?

I'm hoping someone can help me diagnose this car problem (car won't start). I made a short video here so you can hear the noise it makes when trying to start: [video removed] Short summary of the ...
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2answers
53 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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2answers
47 views

Battery only charges with parallel load - why? recoverable, or replace?

As a followup to Little/no charging but alternator and battery test good, the battery is only charging when the charger has a significant load in parallel with it (e.g. turning the key to the on ...
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1answer
16 views

Battery terminal corrosion?

I was preparing my motorbike for storage. When I was pulling the battery I noticed the terminal covered with what looks like corrosion or grease. Can anyone chime in? This is brand new battery with ...
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1answer
43 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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1answer
38 views

Battery only charged with higher than 14.7v

My battery is 12V 8AH. 2 weeks ago tomorrow of good start engine I tried to start engine but my motorcycle was scrambling to start and I found that my battery may be damaged. Maybe it is useful to ...