Questions tagged [charging]

The act of re-vitalising the plates inside a car's battery (voltaic pile)

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12
votes
7answers
25k views

Why can't alternators provide full current at idle?

I was reading about load testing and full fielding alternators in a few different books I've got, and one of the points they all made was that to test an alternator's maximum output (or close to it) ...
12
votes
5answers
42k views

Can I safely upgrade to an AGM battery?

AGM batteries are capable of being charged at a faster rate, and may draw additional amperage from the alternator if it is not regulated. Many cars that come with AGM batteries have special charge ...
11
votes
4answers
1k views

Is any power from the alternator 'free'?

Cars generally (and specifically a Honda Accord 2002) are not very energy-efficient. Given all the inefficiencies, is it "free" to plug in, say, a smartphone into a car to charge while I am driving? ...
11
votes
4answers
61k 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 ...
10
votes
3answers
9k views

I charged my car battery with no water in it

I have a car battery that I am trying to recharge. It measures 3.28v, and my charger is a Selmar Turbo 8. This is the charger I am using: Here is a picture of the ammeter gauge that I found First ...
9
votes
3answers
2k views

Can a conventional car be used to charge an electric car?

A friend who drives a Leaf recently came very close to running out of charge, which prompted another friend to ask if it was possible to "jumpstart" a Leaf from another car. Obviously you couldn't do ...
9
votes
2answers
7k views

Will never charging the batteries of a hybrid electric plug-in vehicle damage it?

I am likely to be forced to use a Volvo V60 in its hybrid diesel-electric plug-in version for my daily commutes. This is a hybrid system comprising a 2.4l diesel engine with an added plug-in electric ...
8
votes
4answers
14k views

Will an auxiliary battery hurt a vehicle's alternator?

I am going to be road tripping and living out of my SUV for a while. I need a way to power a tiny portable cooler/fridge 24/7 and would like to be able to power my cell phone, laptop, and maybe a few ...
8
votes
3answers
6k views

Can you charge an electric motorcycle at an electric car charging station?

Do electric motorcycles and cars use the same type of chargers? Can we charge a Zero motorcycle at a Tesla supercharger station? How about at an electric car parking?
8
votes
2answers
72k views

Is it possible to charge car battery through cigar lighter socket?

I plan to modify my SUV into a camping car. Can I charge my car battery through cigar lighter socket with a 13.6 voltage when my engine is off? Also, can I power the air conditioning compressor and ...
8
votes
1answer
817 views

Connecting to the Battery During Emissions Testing to Measure RPMs?

When doing emissions testing, they connect to the battery, either directly, or using the cigarette lighter socket. I'm assuming that this is to measure the RPMs, as the only other thing connected ...
8
votes
1answer
4k 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 ...
7
votes
7answers
145k views

Jumping car with too many amps?

Is it bad to jump your car with too many amps (i.e., with a 1000 amp jumper vs. a 400 amp jumper)? Or does the car regulate how many amps it will take? EDIT: I was told 400 amps is enough for most ...
7
votes
3answers
693 views

unique alternator issue

I have a 2006 Jeep Wrangler with a stock alternator. I just built a off road teardrop trailer with its own 12v AGM battery and 12v refrigerator --the Jeep battery is an Optima. Using solenoids, I ...
7
votes
1answer
94 views

Radio and Charging Outlet Stopped Working

I have a 2000 Honda Accord V6 LX. The radio was working yesterday and the charging outlet was working earlier today, but now neither are. Did some research and I'm assuming it could be a blown fuse. ...
7
votes
1answer
448 views

how do i know if my lead-acid battery has been resurrected?

The OEM battery in my 2008 Jetta SE 2.5L has been nearly fully discharged one month back (had insufficient surface charge after a prolonged use without the engine running, but leaving it idle for 20 ...
6
votes
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 ...
6
votes
5answers
358 views

Charging circuit

I have a motorhome and tow my car behind. Since I have to leave the car in accessory mode so the steering wheel is unlocked, the battery doesn't last a long time. I want to run a DS line from the ...
6
votes
2answers
514 views

How can you optimise the rate at which your electronic devices will charge in the car (fast in-car charging)?

Like many people who use their car regularly, I like to charge my phone when I'm driving so that it isn't flat with I get to wherever I'm going. I know that some computers have a fast charge port ...
6
votes
3answers
128 views

Charging Battery

Is it OK to leave your vehicle running to charge the battery. It was pretty flat but jumped immediately which tells me the battery is not bad. And how long is it safe to keep it running?
6
votes
1answer
115k views

Bad ground cause alternator to output low volts?

Lately I've been experiencing an issue regarding my charging system. When I measure voltage at the battery terminals while engine is idling, it's a pretty low 12.5v~ or so, when cooling/HVAC fans come ...
6
votes
1answer
26k views

How to diagnose low alternator output

My car (a 1991 Citroen BX 1.4) has been giving me alternator problems since I got it, the alternator failure came on every now and then and dimmed or disappeared when I revved the engine, my first ...
6
votes
1answer
2k views

2005 Ford Taurus U Vin Unstable Idle, Charging System Problem?

A Short Story So a friend asked me to look at a 3.0 L Taurus at his shop. The car originally came in for a P0420 code and they put an anti-fouler on the rear o2 sensor. Whatever. During the road ...
6
votes
1answer
119 views

Electric car charging - what types of chargers are used, and how many of each?

I am an Engineer, at a company that provides transportation related products and solutions. Recently I was asked to design an EV car charging station. I quickly realized that car charging lacks ...
5
votes
2answers
1k views

Motorcycle won't turn over immediately after a pit stop

Motorcycle: 1980 Honda CB900 Custom. After refilling the battery with distilled water, getting it charged and letting the motorcycle sit for a few days... I then went for a ride yesterday. The ...
5
votes
2answers
1k views

Jeep electrical/charging problem

I have an electrical problem with my 96 Jeep Grand Cherokee. The alternator whines and the battery gauge drops to zero. I put a new battery in and a new alternator and it didn't fix the problem. any ...
5
votes
2answers
4k views

Charging batteries thru cigarette lighter

The answer to this may be so obvious that I'm almost too embarrassed to ask; however, here goes: I have a high-end battery charger for my car which charges through the cigarette lighter receptacle. I ...
5
votes
1answer
5k 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, ...
5
votes
3answers
333 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 ...
4
votes
2answers
485 views

Alternator squeal

98 rav4. I have a bad squeal, however I tried a new alternator and it did not go away. The charging voltage does not go above 12.3 and when I unplug the plug on the back of the alternator the ...
4
votes
4answers
2k views

Cigarette lighter socket no longer charges phone

I have swapped out the USB cable, the USB adapter, as well as had the socket tested by volt-meter at the mechanic. Everything checks out as normal. The "charging" icon shows up on phone display, but ...
4
votes
2answers
65 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 ...
4
votes
1answer
1k views

one wire alternator

I have a one wire alternator on 350 Chevy V8 in a 57 Belair. After charging the battery and running the car for about an hour the battery will run down. Changed the alternator but no difference. ...
4
votes
2answers
3k views

What's an acceptable battery power drop on light load?

After an overnight rest in the warm weather (above 16 degC), unlocking my 2008 Jetta 2.5L SE, my OEM battery with the minimal "welcome" electronics -- remote open of the driver door a few seconds ...
4
votes
1answer
55 views

Weird charging issue

I have a 2005 Honda Odyssey that I changed the battery on about a month ago. I was a little paranoid that I might also have a charging problem so I've been keeping a little voltmeter plugged into the ...
4
votes
1answer
1k views

Motorcycle Lithium Battery - Potential Parasitic Drain

I have a track racing motorcycle with a lithium battery, the battery has gone flat on two separate occasions as a result of standing for a period of time. The first time the bike was standing for ...
4
votes
2answers
73 views

What is the Problem

I have a 2004 Chevy Trailblazer EXT. I was driving down the road and my battery light came on. I didn’t know what it meant but I kept driving. Then my lights became dim and I pulled over and parked at ...
4
votes
2answers
365 views

Battery stops getting charged after 15-20 minutes of driving

I've got a 1998 Mitsubishi L200 pickup that has a charging problem. When I start the engine the indicator shows that battery is charging but after driving for 15 or 20 minutes it stops charging. I've ...
4
votes
2answers
185 views

Got serious earth terminal corrossion

I have a double battery set up (not leisure) as my MPV was built to operate in cold regions - had a little bit of corrosion over time. Last inspection a few months ago I had to replace the earth ...
4
votes
1answer
274 views

98 jeep wrangler 4- cylinder charging problems

My jeep check engine light came on. My volt meter went to 0.1. I changed the alternator and it worked for about 10 seconds and it went out. I installed another one and it did the same thing!!! What ...
4
votes
2answers
3k views

would a sulfated discharged 12V battery charge at 12.5V?

I got a Stanley FATMAX RE-CHAGEiT 8AMP Automatic Battery Charger & Maintainer from Walmart for 29,97 USD, which appears to have three states of charging the battery -- detecting the voltage, rapid ...
4
votes
1answer
125 views

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 . ...
4
votes
0answers
631 views

Mazda Bongo Friendee 2002 charging system or alternator not working after incorrectly jump-starting it

I incorrectly jump-started a 2002 Mazda Bongo Friendee by interchanging the negative and positive terminals and I blew the main fuse, replaced it but now the alternator or the charging system is not ...
3
votes
3answers
4k views

Car Battery Flat After Sitting for 9 months - BMW e87

Ive been away for 9 months and returned a few days back. I tried to start my BMW 1 series 2007 118D and it wouldn't start. The car was completely dead as the fob wouldn't do a thing, so I tried to ...
3
votes
2answers
395 views

Battery or what?

A few years back I picked up a 1989 Harley Davidson Sportster. I t was originally an 883, then the previous owner put in a 1200 cc motor. He threw a rod, so he said and had to have the cylinders bored ...
3
votes
2answers
729 views

Why is my car not charging?

My fiat Palio 1.2 2006 model acted up on me in the middle of a freeway. I had just brought a brand new alternator and a battery, because they were giving me a tough time. All was well unit today ...
3
votes
1answer
1k views

Can I trickle charge battery through OBD2 port 2007 civic

Trying to determine if 2007 civic OBD2 port is live with key off so I can trickle charge with a solar panel
3
votes
1answer
81 views

Dead battery not really dead?

2007 Escalade, 6.2L AWD This morning I fired up the car, drove about 4 miles and stopped at a gas station. Filled up the tank, got back in, turned the key and... click. No slow turnover or anything. ...
3
votes
2answers
553 views

24V truck charging circuit problem

I want to diagnose a faulty charging system in a European coach bus ('99 Neoplan). It has 2x 12V batteries in series and also two alternators. With the engine running I measure ~21V across the end ...
3
votes
2answers
12k views

2007 Chevy Aveo - battery, alternator, or something else?

I bought this car when it had 120,000 miles on it, a few weeks ago, for a grand from my friend who sold it to me with the caution that it had a few issues. I am a novice driver and needed a car to get ...