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
15k views

Riding mower won't start with new battery

I bought an old riding lawn mower (B&S 12HP). To start it, I had to jump it from a car. The battery also looked old, so I replaced it with a new one. When I tried to start it with the new ...
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4answers
55 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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12 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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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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3answers
46 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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2answers
113 views

2004 Volvo S60 starting issue

I am interested in buying a 2004 Volvo S60. The guy selling the car says: "It won't start. When you try to start it. its as if the battery was bad, but it's not" Does anyone know what that means? ...
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1answer
14 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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1answer
117 views

Why drill a hole in the base of a 12V battery?

I attempted to do some regular battery maintenance on a recently acquired vehicle. The cells were all low on fluid so I added some distilled water to each cell. However, one of the cells was obviously ...
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3answers
3k views

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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0answers
21 views

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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1answer
34 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
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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3answers
2k views

Honda City 2009 : It would not start Start

My honda city 2009 AT would not start. The gauges would light up. The power windows,radio and AC worked. I was able to turn the key but when I try to start it, it will just give a sound like it is ...
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3answers
76 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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1answer
20 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
35 views

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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2answers
26 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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3answers
19k views

When should I disconnect the battery to stay safe during repairs?

I am planning to do some car fixes and want to know what precautions I must follow in order to make it safely. Specifically, I'd like to know is for what kind of work, the battery should be unplugged. ...
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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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6answers
65k views

Can I jumpstart a non-hybrid car from a hybrid or full electric car?

This morning I had starter battery troubles with my 2001 VW Eurovan. As it happened, my father-in-law arrived just at the right time in his fancy new Toyota Camry hybrid. So we opened the hoods, dug ...
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1answer
44 views

Dead battery or?

Jump started dead battery, took car out for test drive and to charge up battery, lost power without any warnings while driving, no lights came on just total power loss. Had to jump start car again ...
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2answers
18 views

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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3answers
4k views

My motorcycle wont start unless jumped.

I have a 2009 Hyosung 250 and I've had this problem for as long as I've had the bike and through numerous batteries. I just purchased a new battery a few days ago and it checks out good puts out 12V. ...
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1answer
134 views

Can an 18V-5W Solar Panel Provide an Equalizing Charge for a Battery?

I recently finished a project in which I installed an additional cigarette lighter port on my car that was always on (the existing one was only on when engine was running), and connected a small solar ...
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1answer
26 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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1answer
23 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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3answers
7k views

Why do some cars have battery under the trunk?

My 2016 Toyota RAV4 hybrid has a strange location for the 12V battery. Usually, the battery is installed under the hood. Well, in this case, the battery is installed under the trunk. This is true ...
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2answers
48 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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1answer
41 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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1answer
30 views

Isolator or Separator for my Hitachi alternator

I am looking to charge an auxiliary battery for my motorhome, but am not sure if I can use an isolator given the alternator. It is a Hitachi LR160-78B 60a alternator in a 1985 Nissan 720 pickup (...
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2answers
46 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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8answers
64k views

How long time do I need to run the engine to charge the same amount of power that the starter took

I have a Range Rover 4.6l V8, and I'm wondering if anyone have some sort of estimate of how long time I need to keep my engine running, to charge the same amount of power that the starter took to ...
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0answers
13 views

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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1answer
9k views

Car battery - Disconnected just positive while doing work

I've installed an extra 12V source in my car and everything is working. While installing it I removed the positive terminal from the battery and left the negative connected. (Resting the positive on ...
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1answer
364 views

Vauxhall Corsa won't start, lights/radio working fine

I have a 1.2L Petrol 2008 Corsa that won't start. For the last couple of months the battery light would start flashing once every couple of weeks when starting the engine. I don't do long trips often,...
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2answers
3k views

Check Panasonic battery production date

I bought a Panasonic battery. A code is shown on the battery. I am afraid the production date maybe 2014. How can I determine of production date of this battery ? I've checked with the supplier ...
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3answers
11k 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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0answers
10 views

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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3answers
3k views

Clicking sound when trying to start

We haven't driven this car much in the last month, so it's been sitting in our back yard. Yesterday we tried to start it up, but it is making a clicking sound while turning the key in the ignition, ...
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0answers
3k views

Intermittent battery light on 2005 Accord

I have a 2005 Accord LX 2.4L w/ 101k miles and a few weeks ago, the battery light came on. The battery was changed last year. After checking everything, I concluded that it was a bad alternator, so I ...
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1answer
87 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
63 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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2answers
586 views

My car battery keeps dying, what should I do?

Because I used to leave my car unused for extended periods of time (couple of weeks), the battery can't remain unused 3 days without dying. And using jumper cables everytime is difficult. I bought a ...
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1answer
330 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
43 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
36 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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5answers
17k views

how much water can be safely added to a battery?

My 2008 Jetta SE 2.5L has the battery as follows: ENERTEC EMC // 1J0 915 105 AD // 12V 61 Ah 330A DIN // 540A EN/SAE. It would appear that the battery can no longer hold the starting charge after an ...
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2answers
25 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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1answer
25 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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0answers
22 views

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 ...