Questions tagged [charging]

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

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2010 Dodge Avenger : Battery light coming on, battery discharging

The patient is a 2010 Dodge Avenger R/T with the Federal-spec 2.4L I4/4 speed automatic. It has ~117K miles. My son's original complaint was that the battery light had come on while driving to an ...
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1 vote
1 answer
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Will battery recharge help temporarily?

I am fairly certain my wife's BMW X1 needs a new battery, but cannot get into NTB for another couple of days. If I give the battery a bit of a boost with my external charger for the next two nights, ...
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2 answers
39 views

Can EVs charge from solar panels directly?

Going to leave my car in an outdoor parking lot for a week, and it made me curious. Can I attach a small solar panel (<100W) to the inside of any modern EV such that there is a higher state of ...
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1 answer
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Is there any walkthrough material, or guide to set up solars on a Tesla to charge while driving?

I have found videos and full tutorials how to achieve solar charging with portable solar panels such that you could even non-temporarily affix to the top of the car, and charge when you stop (normally,...
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1 answer
39 views

Is it normal to over flow little battery liquid

I got an overflow issue with my car's old battery and now replaced it with a new one. currently, when I go for a long drive few vapors are released through the overflow exit side of the battery. Is it ...
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2003 Ford Escape charging issue

So I’ve had alternator issues in the past in my 2003 Ford Escape. Just the other day my battery light came on, I took out the alternator and the battery and my alternator failed a bench test, so I ...
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1 answer
78 views

What could cause premature failure of a brand new alternator on my 2007 Ford Escape?

The (I believe original) alternator on my 2007 Ford Escape failed last month and was replaced with an alternator from FVP. The battery was tested and seemingly passed muster. Now, three weeks later, ...
1 vote
4 answers
2k views

Under what circumstances should you use the Fast Charge or Trickle Charge settings on a car battery charger?

When using a modern battery charger to recharge a basic car battery that is in good condition, but is run down to the level that it is unable to turn an engine over, under what circumstances should ...
1 vote
1 answer
148 views

Charge 24V Battery from 12V Alternator in Trailer

What is a reasonable approach to charging a 24V battery system from a 12V source such as an alternator? Can I simply use a 12v-to-24V step up converter? Seems I’d actually need this converter to hit ...
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1 vote
3 answers
160 views

Brand new battery sitting for 3 months, doesn't hold charge anymore

I have a 2017 Toyota Yaris Hatchback. The car had some cranking issues. I did a cranking voltage drop test (dropping to min 7v when cracking), it seemed like the battery was done. I replaced the ...
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0 votes
1 answer
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How high is too high for battery volts

I have been doing some unrelated auto electrical work on a 1964 pontaic bonniville .I checked the charging voltage with the giant 389 at normal idle .Measured 15.9 Vdc on trusted DVM .When we ...
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2 votes
3 answers
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Battery charging?

My car battery died last Monday and it’s been a week; I’m trying to get it to charge using a noco genius portable battery charger but nothing comes on in my car, no sound lights or anything. Will I ...
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1 answer
115 views

Safety around permanent trickle/float charger connection for car battery

I rarely use my second car, as a result, the battery often drains too much by the time I need it. I have a slow charge battery pack which works if I want to wait a while to get to the minimum level to ...
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3 answers
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Charging LiFePO4 with car alternator

I currently have this setup in my van: Alternator -> Car Battery -> Voltage Sensitive Relay -> Leisure Battery (AGM) I'm thinking of changing out my AGM battery with a LiFePO4 battery instead,...
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1 vote
1 answer
271 views

can I trickle charge a spare car battery (located inside the car) from the cigar lighter port while driving?

I keep a car parked in a lot in another state. I get out there every few months or so. The battery under the hood sometimes is dead due to the small system draws while the vehicle sits idle for a ...
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41 views

My car battery light is on

I have a 2010 Toyota Corolla S. Today, after driving around for 15 minutes, when I parked, my battery light came on. I took it to Autozone. After checking my battery and the changing system they said, ...
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155 views

MotoMaster Eliminator 1400A Booster

I have one question about charger booster. I have MotoMaster Eliminator 1400A Booster bought in 2014. I think its battery is dead, because it does not boost the car even when it is fully charged. Can ...
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1 vote
1 answer
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12 to 24v charging with isolator

I'm trying to find the best way to charge my 24v solar battery bank off my 12v bus system. The simple way seems to be a step-up converter and a diode, but I'm wondering if I can replace the diode with ...
0 votes
1 answer
281 views

If you connect 2 car batteries in parallel and one has a low charge, how much would the low charged one draw from the other battery?

I'm just wondering this for the sake of understanding. If you have a low charged battery that is connected in parallel with another battery (that is fully charged), how many amps would the low charged ...
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2 votes
1 answer
246 views

Fiat 500e charging EV discharged battery below "standard" charge level

I'm trying to revive Fiat 500e EV battery which is discharged after not using it for 3 months (second reason was bad 12V battery). I've disassembled whole battery pack below car and I have access to ...
1 vote
0 answers
85 views

Is it safe to disable the stop/start system?

I want to permanently disable the stop/start feature on my Skoda Octavia Mk3 (based on VW). TL:DR; The implementation is faulty. Suppose I want to pass a parked car, and slow down for a car coming the ...
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-1 votes
1 answer
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Cigarette lighter fuse repeatedly blows when connecting car inverter

I was using this car charger to charge my MacBook Pro from past two months without any issue in my Swift Dzire 2012 model. Today, I connected two laptops at the same time using a multi socket ...
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1 vote
2 answers
231 views

Can I charge my laptop using a simple USB cigarette lighter

I’m not sure this is the same thing as the 100w inverter i saw mentioned in another answer. This is supposed to work for phones but I’ve never used it for my laptop as I’m afraid it’ll break it. It’s ...
2 votes
2 answers
153 views

What is the Likelihood of a car alternator fault being due to worn field winding brushes? [closed]

TL;DR: If a 2001 Toyota Corolla alternator is faulty, how likely it is that the field winding brushes have gone open circuit? It's reasonably likely that the alternator is the original one.  ...
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1 answer
103 views

Is the 3 pin plug provided in a cigarette lighter port inverter (12v-220) actually grounded?

I have been planning to buy a 12v car inverter, that plugs into the cigarette lighter port and puts out 220v with max 200watts, for sometime now. The one that I ordered is of brand portronics and has ...
4 votes
2 answers
556 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 ...
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2 votes
2 answers
1k views

12V AGM battery charging voltage

I have the following 12V car battery: Varta Silver Dynamic AGM 595901085 (12V/95Ah/850A), and the following car: Jaguar S-Type 2.7D. In the technical cars manual it says this: So in cold winter ...
1 vote
2 answers
181 views

Fiat 500e 2017 charger

i just owned a Fiat 500e 2017 sport package... i wanted to make sure that the charger that come with it is the real original one and not imitative, as i saw charger with different style, how i can ...
1 vote
1 answer
58 views

93 Seca 2 won't start without a jump, battery good?

So i have taken the battery out and had it tested at autozone and they said the battery was fine. the solonoid is fine because if i hit the starter the motor starts to act like it wants to turn but ...
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262 views

2011 Ford Mustang Gt "Check Charging System" light after changing alternator

My mustang started showing a code for "camshaft position sensor" so I replaced it. 1 day later, it came back on, same sensor so I started doing research. Everything I read said it was probably the ...
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2 votes
0 answers
2k views

Alternator: amperage when charging a car battery (and time to charge)?

What is the amperage of a typical car alternator when charging the car battery, and how long would the alternator take to charge it (let's take a 60Ah battery as an example)? I have seen multiple ...
3 votes
1 answer
252 views

How is alternator directly connected to vehicle electronics?

I've tried a lot of research but I can't find specifically what I'm looking for no one has actually mentioned this and I've looked at various wiring diagrams which still don't prove how this is ...
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3 votes
1 answer
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
2 votes
1 answer
109 views

Alternator health check

My car (Fiat Grande Punto MY2008) has been having an occassional battery light and failure of the power steering. Perhaps once in every 10-15 startups, and is resolved by restarting the car. The car ...
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2 votes
1 answer
95 views

Any benefits of a relay over a dead mans switch between two 12V batteries apart from preventing discharge of starter while car is off?

I am fitting a second "leisure" battery in my car. It will be a 12V 115-150Ah AGM lead acid battery for use when the engine isn't running with loads up to 500W, generously, in practice It will be 250W ...
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4 votes
2 answers
79 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 ...
0 votes
2 answers
157 views

if my alternator was tested and functioning properly why does my battery and brake light keep coming on in a 08 Nissan Altima 3.5

started my 08 Altima and put it in gear and it didn't have the power to go anywhere and then the car just died. bought a new battery and everything worked fine. now my battery and brake light on the ...
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3 votes
2 answers
398 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
0 answers
46 views

How do I set the upper cutoff voltage for a car alternator charging the car battery?

With sustainability in mind, and trying to do something new, I am looking forward to charge my car battery using Solar Power, without making much changes to my car's electrical system. Basically I ...
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6 votes
3 answers
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 ...
2 votes
2 answers
120 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 ...
2 votes
1 answer
206 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 ...
3 votes
1 answer
144 views

Battery charging issue

I've got a 2012 Yamaha WR450F motorcycle which has a 3 phase alternator with a regulator/rectifier. Currently the battery is not charging when the bike is running and testing the voltage when running ...
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4 votes
2 answers
75 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 ...
1 vote
1 answer
298 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 ...
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1 vote
0 answers
181 views

Alternator amperage to charge 3 batteries

I have a 2009 accord sedan, with a sound system installed. How many amps should my alternator be to charge my 3 batteries? My OEM alternator currently puts out 130.
-1 votes
1 answer
59 views

Use of diode to charge in-house battery from motorhome solar system

I want to charge in-house battery (Fiat Ducato) from the motorhome solar system. I presume I can use a diode to do this? Can you please advise and what size diode would be necessary. Thank you.
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3 votes
1 answer
58 views

Charging problem

Ducati 450 scrambler 1975 converted to 12v with Luas Rita AB11 electronic ignition it is so easy to start with this modification I put a new original alternator 3 face that gives up to 55v at 5000rpm ...
3 votes
1 answer
574 views

2002 Subaru Legacy GT - New Alternator, Battery Light Stays On

I recently had to replace my alternator as the one original to the car died after 180k miles. The new unit is a Subaru re-manufactured alternator purchased from the dealership. The original failure ...
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2 votes
0 answers
418 views

Dual alternator setup that is separated one alternator and battery runs the truck one alternator and battery runs the audio system

Hey guys I'm JD and I've got a 2008 Chevy Silverado extra cab 4 by 4 flex fuel truck with a 5.3 l vortec I have added a second alternator and second battery!! Separated the way this thing works the ...