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 ...

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4
votes
4answers
61 views

Replace or recharge a battery after is has been drained?

The keys in my car were left in the on position for about 12 hours (and maybe the interior light left on) and the battery is drained. Is there any way I tell if I should replace the existing one or ...
5
votes
1answer
51 views

ECM Fuse Blown what to test next

Recently I was on the highway and suddenly my car broke down and it was cranking and all but not starting so I knew some fuse has blown. I removed the indicator fuse and used it for fuse which gave ...
4
votes
2answers
208 views

Car battery won't charge above 50%

I had a problem starting my car after not driving it for two weeks. After charging the battery with a CTEK trickle charger via the cigarette lighter socket, the car started fine. I had my car battery ...
7
votes
1answer
161 views

How can I tell if a flat car battery is charging when hooked up to a trickle charger?

I've been researching charging flat batteries and I think, if I've understood correctly: Trickle charging isn't always possible from flat, because: Some trickle chargers don't charge at all unless ...
8
votes
1answer
191 views

Does this crack in a battery terminal post indicate that the battery should be replaced?

Mechanics at the local garage have insisted it's "no problem yet", but people here in Sierra Leone have different standards to me when it comes to car safety... This is a pic of the positive terminal ...
4
votes
1answer
57 views

Poor battery condition, replacement required! Or is it?

I drive a 2004 VW Passat B5. Recently, my insurance company came round to fit a black box to my car as part of the terms and conditions of my car insurance policy. Whilst they were doing this they had ...
4
votes
0answers
55 views

How does Audi A6 C6 battery level meter work?

my Audi a6 c6 always show (through MMI) that my battery level is 100% despite if it's almost empty. Wondering how does it work? Does it only checks the voltage of the battery? If so wouldn't it be ...
12
votes
5answers
3k views

Should negative trickle charger clips be attached to the battery negative terminal, or ground?

I'm trickle-charging a car using direct connections to the battery. I thought this couldn't be simpler: ventilate, unhook the battery, connect the positive first, then the negative, then turn on the ...
6
votes
1answer
83 views

Battery light on after new alternator

Car: 2003 Honda Civic Si G1Wh dash cam, 400w amp, 4300k HIDs My alternator failed badly (stereo cutting off), no battery light. Replaced it with a reman Duralast, battery light is on. It shows 14.5v ...
10
votes
1answer
193 views

Are there downsides to making an accessory socket always live, if accessories are removed when not in use?

In some cars, the power line from the battery to the accessory outlet (aka cigarette lighter socket) is always live. In others, it's off until ignition. It seems pretty much random which cars are ...
4
votes
1answer
69 views

New Case - Watered the battery and got rust on one of the engine pipe

I bought new car and I added battery water to level. But some spilled on the engine and one of pipe got effected and it has rust on it. I went to mechanic, he told me to apply diesel on it. I did, ...
6
votes
2answers
101 views

AirbBag and 4x4 light is on after changing BMW X3 battery. Why?

After I changed my BMW X3 2008 battery at home the 4x4 and AirBag light is on. Any ideas why? Some people claim that changing BMW x3 battery is not straight forward, however, they don't explicitly ...
-1
votes
1answer
52 views

Power cuts out when I wiggle positive battery terminal [closed]

Power cuts out when I wiggle positive battery terminal right when I wiggle it left power comes back on megane 225 please help when I put foot on accelerator it feels like I'm being g pushed backwards ...
7
votes
2answers
94 views

Battery and Alternator Pass Test - 2003 Mustang GT

I have a 2003 Ford Mustang GT, I had the battery tested and it will take a jump and start up so naturally I am thinking the alternator is bad. I take the alternator out and have it tested 3 times and ...
5
votes
1answer
115 views

Burning Rubber while driving and after

Tonight I popped out in my partners car and noticed an awful burning/chemical smell whilst driving, this smell got worse if you turned on the AC (FAN BLOWER), so I got her to pull over and had her pop ...
7
votes
2answers
110 views

Why do the batteries on some cars need to be hot-swapped?

By "hot-swap" I mean ensuring that the new battery is connected in parallel to the old battery while the old battery is removed and the new one is installed in its place. The idea is to ensure that ...
6
votes
2answers
128 views

Removing a car battery - order of wires explanation

Q1: When one removes a car battery, why does one start with the minus wire? Is it because if we remove the plus wire first it may touch the body of the car and close the circuit, causing a ...
4
votes
0answers
40 views

2003 honda accord battery light

Battery light keeps coming on and off and power steering feels like it is going out. New battery a year ago, new alternator a year ago. Replaced the accessory belt a week ago as well as the accessory ...
9
votes
2answers
275 views

Non-functional gas pedal, engine stalling, dead battery: broken alternator?

I have a 2005 Nissan Sentra. The following happened twice within a few days: I stopped at a red light. When the light turned green, pressing the gas pedal had no effect at all. However, the car ...
3
votes
2answers
105 views

Battery Explosion - What are the reasons a battery would explode?

A long time ago, in a galaxy far, far away, I saw a battery explode. I was about 100 feet away and two mechanics were jump starting a Harley Davidson from a truck. The operator of the truck was ...
1
vote
2answers
59 views

Suddenly losing electrical power, but after jump start, test the battery and alternator, they seem fine

99 corolla seca. OK so first time it happened i was driving and i suddenly lost power (electrics / everything else) it just kind of putters a little and then that's it. I called roadside assist and ...
5
votes
2answers
139 views

Is white powder on the battery terminals harmful?

I have a four and half year old car. I have recently noticed that there is white powder forming to the battery terminals. The car still has the original battery and probably should be replaced ...
4
votes
4answers
73 views

What is the expected lifetime and failure mode of lead acid battery?

I have a four and half year old manual transmission car with start/stop technology. The car has required jump start once after I accidentally left the lights on overnight. I have recently noticed that ...
2
votes
1answer
24 views

2005 4 cyl Ford Escape

My daughter's 17 and pretty smart. Her Escape wouldn't turn over this morning, sounded like she just needed to jump it. She's never done it before, I'm at work, so I told her to get her friend and ...
2
votes
2answers
62 views

Jeep stalls a lot has trouble idling after battery pulled for a long time?

I've had this a problem a lot with this vehicle. I have a 99 Jeep Wrangler TJ. I believe the car's computer has a battery that is a dead (like a watch battery). For some reason when it stalls or when ...
6
votes
2answers
78 views

Car battery appears good but car won't start

My 2005 Nissan won't start today. Battery is relatively new(about one year old) and I can turn the lights on, front headlights, and it appears fine. However, when I tried to start the car by turning ...
5
votes
5answers
175 views

When jump-starting a car, won't there be a huge back current into the dead battery?

So imagine I have car D with the dead battery and car G with the good battery. Initially, both cars are turned off. I hook up car G to car D in the proper order. Before I start either car, won't ...
2
votes
0answers
47 views

2001 Jeep Grand Cherokee - What is Difficulty in Replacing the Negative Battery Cable in this Vehicle? [closed]

We have replaced the alternator and battery but still have problem with starting. It takes a jump and starts every time but after you park and come back, it won't start again. I has been to the shop ...
5
votes
1answer
85 views

Motorcycle Starting Issue - no longer starting after attempting to jump with a car battery

I tried jump start my bike with my car battery because the motorcycle battery was really low and would not start. I mistakenly touched both ends of the jump leads together and cause a big spark, ...
0
votes
1answer
79 views

Calculate car battery life using OBD parameters

I want to calculate the battery life of a car based upon OBD2 parameters like engine load, distance traveled, Control Module voltage etc. Can anyone please guide me as to how to do this? If ...
2
votes
1answer
54 views

Different Battery Voltage

What are the different battery voltages trucks work with? I am aware of 12v and 24v batteries, are any any systems that work with voltages above 24v? Can i safely get a 12 or a 24v system on any ...
1
vote
1answer
56 views

RPM problem Ford 2009 Crown Vic

I recently removed the car battery and plugged it again. I then noticed that when I turn the A/C on the RPM goes up and down 1000~500 rpm and sometimes when I shift the gear from N to D or R the car ...
0
votes
1answer
16 views

charging battery bank with two vastly different batteries

I have a ctek D250S DC-DC charger in my vehicle charging a 12V 100Ah agm battery from solar and alternator with up to 20A. While travelling I need to charge a 12V 7.5Ah SLA battery. Conneting both in ...
2
votes
1answer
55 views

Constant drain on battery solution

I have a 2012 Ford Fusion SE. My problem is that my dc power outlets (cigarette lighter) are on continuously. I was charging one of my cell phone battery packs and as I unplugged it I noticed that ...
3
votes
3answers
217 views

Should fuel pump noise be changing according to electrical load and RPM?

One thing that bugs me about my car is that the fuel pump noise is fairly inconsistent. Turning on the lights, aircon, defroster, etc. lowers the fuel pump speed and gives a lower pitched noise. It ...
4
votes
1answer
293 views

My battery light came on, can I still drive?

I drive a 2002 Honda Civic and today on my way to work the battery light came on. I drove my car to auto zone and they told me my battery is no good anymore. However, I was planning on driving home ...
2
votes
1answer
198 views

Where is positive and negative terminals under hood of 2006 Volvo S60?

I need to jump start a 2008 Ford Focus and I am using my wife's 2006 S60 Volvo. This Volvo has the battery in the trunk and the owner's manual says not to use that for jump starts. Instead, it ...
2
votes
1answer
35 views

Car screams after 14-day non-use upon start-up

On two occasions since I purchased my 2004 Infinity G35 a year ago, the car was garaged for more than 10 days without being started. When I did start it, the engine screamed at me as I backed the car ...
6
votes
9answers
2k views

2 Volts on Car Battery

My car battery has gone completely flat after leaving my car parked up for about a month. Tried turning over the car today, and none of the lights on the dash light up. Ran a multimeter across the ...
4
votes
2answers
1k views

When reconnecting a battery, why connect the positive first? [duplicate]

When reconnecting a battery, why is it recommended to connect the positive lead first, and the negative lead last? What difference does it make if they are connected in the opposite order?
2
votes
2answers
151 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 ...
0
votes
1answer
80 views

2002 Honda CRV Suddenly Throwing Multiple Codes and then a Dead Battery

Last night the CEL came on, and I got the codes read on the way home. P0122: Throttle Position sensor "A" circuit low voltage P0139: Secondary HO2S12 (heated oxygen sensor - bank 1 sensor 2) circuit ...
0
votes
1answer
77 views

Does a corroded starter drain battery?

I know a "bad" starter can drain battery, but am unsure what constitutes "bad enough" to allow a starter to drain the battery. Suppose a hypothetical coolant leak has corroded one's starter. Would ...
2
votes
3answers
390 views

Are inverters bad for your car?

I bought a Duralast 130W inverter and it says 260 peak watts and it plugs into the 12V cigarette lighter. I want to charge my HP laptop with it. Is it bad for the car?
7
votes
2answers
259 views

My car has problems starting, but the dealership checked the battery and said it was fine

I have a 2006 Toyota Rav4 - The other day, the car wouldn't start. We jumped the battery and it started right up. No lights were left on and nothing is plugged in that would be causing this. I took it ...
1
vote
1answer
206 views

Honda Civic hybrid won't start

My Honda Civic hybrid won't start. No interior lights, no power. Can I jump start the battery under the hood? Not sure since it is a hybrid and has two? batteries. I did not drive it for 3days. ...
4
votes
1answer
148 views

White Powder Forming on Battery Hold Down Bracket

I replaced the battery on my 98 Mazda 626 GF 2L about a month ago. I haven't driven it for about two weeks, and noticed the voltage is down from about 12.57 to 12.02 so far. I just noticed that ...
0
votes
3answers
170 views

Impact of cigarette lighter ports on car battery

I have a cigarette lighter hole in my car that produces 12V. I bought a cigarette lighter extender that has 3 cigarette holes and each hole has 12V so that's 36V instead of 12V. Will that damage my ...
4
votes
2answers
114 views

2013 Honda Civic battery hold down bracket plastic cap wont come off

I'm trying to replace the battery on my 2013 Honda Civic. I gotta take off the hold down bracket but there is a little cap on top of the bracket nut that's keeping the cables (needlessly) secure. ...
1
vote
3answers
84 views

Car doesn't start, cranked at first but now it doesn't

I have a Honda Civic 1995 that suddenly didn't start after a day or two of not being used. I managed to start it with starter cables and drive but when I turned it off I did not start again. I didn't ...