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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749 views

Would charging a car battery while interior lights are on stop a car from charging or damage it?

Could charging a fairly modern car with lights on (or any other electronics on) damage it? My car battery drained to a voltage of 5.5V (very low I know) because I left the interior light on for 2 days....
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Trying to find an answer for my 92 Dakota not turning over

I've changed the neutral safety switch and checked the wiring from the battery to the starter and the it still nothing but i can start it off the solenoid and it runs like a charm any suggestions
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How many amps should my aux battery be charging at

I’m going to be installing a 2nd battery for all my lights and stuff, I want to be sure I’m not overvolting my battery. How many amps should my aux battery be charging at.
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Can you attach multimeter to battery terminals while car running/charging?

I cannot remember how but recently I blew the fuse on my multimeter. All I remember was the car was running when it happened. Can I attach the multimeter to battery terminals to check voltage while it ...
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If a jump start didn’t work, will a booster work?

Car has been idle for several weeks and came to find it wasn’t starting up. Battery is 1.5 years old and first time it’s died on me. Tried to jump start it by commecting leads for some 15 minutes but ...
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Is it harmful for my car to be only driven once a week? [duplicate]

I spend most of the time at home and I rarely drive my car. I only drive it one day per week to keep it as lubricated as possible. Is it harmful for my car? Should I drive it more often to keep its ...
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Battery Disconnect Switch: Shank Diameter

https://www.harborfreight.com/battery-disconnect-switch-97853.html The shank-end (in red-circle) is designed to be connected to an existing negative lead. Attempts install the device on an Integra ...
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Battery voltage drops from 12.3V to 11.2V in 5mins

I was in my car, while snowing, with the radio and the heating turned on but the engine off. I checked the battery's voltage, which dropped from 12.3V to 11.2V in 5mins. Is this behavior normal, or ...
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Car battery is flat, how can I tell the cause from multimeter results?

my car battery is flat. I did some measures with a multimeter. I will explain them below. Can anyone please tell me what can be the issue? Note: My car is a VW Polo 9N3 2007 Symptom For the last 2 ...
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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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Car won't start if the battery has been on for ~5 minutes

I have a 2006 Honda Accord, and my car battery is not too old (1-2 years). The car starts fine, I don't normally have issues with it. However if I turn off my engine and sit in my car with the battery ...
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Can somebody please tell me, my new battery's date of manufacture, please? [duplicate]

C211A 077 this is the code on my recently purchased battery....can somebody tell me its date of manufacture, please? EDIT: Forgot to add, it's a Exide Excell 80ah..sorry.
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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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Neighbor leaves his positive terminal disconnected - dangerous? [duplicate]

A guy who owns a neighboring car in the communal parking garage I park in disconnects the positive side of the battery when leaving his car for a few days at a time. Is this dangerous? If so, under ...
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Not Replacing Car Starter

I have a problem with my car starter. I believe this was a problem on my car starter since I have a mechanic who went to my office and have it check. He says the battery is ok. When I start the car, ...
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Parked car causing fire

Scenario: There is a parked car in a garage, that's been unused for a month and has the negative side of the battery disconnected. Car is from 2001. Could the battery explode? Or could the car cause a ...
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1answer
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AGM Battery - Residual Voltage?

Wife's 2018 Mercedes GLA250. Car is 3 Years and 4 months old. Just turned over 12k miles. The AGM battery is at 12.25Volts after sitting unused for a week. Everything I read says an AGM battery should ...
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Battery showing lower amperage

Civic coupe vti 99. I have had my battery tested in Halfords and they said all was fine however they pointed out the amps on the battery was 263 whereas it should be 300. I have been doing not 10 ...
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Help needed with electrical setup for overlanding

I am converting my 2011 Nissan Frontier Pro-4x to an overland-ready setup. For this, I want to set up a separate electrical system to power certain items. I need some help calculating the requirements ...
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DIY main battery swap on Volvo V70?

The car is a Volvo V70 2.0 D4 181 Momentum from 2014. I bought it used in 2016, but in 2017 it started having problems with the automatic start-stop thing, and a year later it started saying "...
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Is a battery healthy if drops under 10 volts with load?

To my knowledge of a battery drops under 10 volts on start then it is unhealthy and need recharging/replacing. However I have just read another answer where it states a battery with a dead cell can ...
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Bad connections or bad battery?

Car battery had gone bad at least in part to corroded terminals. I cleaned up the terminals and eventually got battery to 12.8. it had been dropping below 10 volts on startup but with driving/...
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Where can I find information about car PIDs?

i'm doing a research and i can't find voltage information from the car sensors, where do you find such information? finding the voltage range would help a lot.
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ECT registering low at steady state. (low enough to set a code) No explanation

A little back story, this is a 2015 Jeep Wrangler. Since 2017 I've kept an eye on coolant levels because sometimes I can smell burning coolant when I'm in front of the vehicle (not in the vehicle). ...
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Peugeot 206 2003 engine overheating STOP light

I bought my 2003 Peugeot 206 second hand from a private car dealer about 4 months ago and everything seemed ok, except for the exhaust pipe appearing to be tied with plastic zip locks. About a month ...
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How long will battery last if disconnected at full charge during winter?

My car won't be driven during the winter, so from about November through March (5 months) it will sit idle. If I disconnect the negative terminal on the car battery when it's at full charge, should I ...
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Battery set up for camper

Just wondering if it's safe to run the following set up. In car - starter battery - isolator switch - second battery (lead acid deep cycle) - Anderson plug to rear of car - 2x AGM batteries in the ...
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94 head gasket replacement now my car wont start

I replaced my head gasket and once I got to putting everything back together my car wouldnt start it wont crank and I have no power going to my car and suggestions
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Car refuses to start with repeated clicking but can be jumped

Day 1: My 2013 Infiniti JX35 won't start. When I press the ignition button, the car loses all electrical power and I can hear repeated clicks under the hood. I installed a new battery, and it started ...
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How to diagnose if battery is faulty or alternator is faulty

Little Background: I own 2016 Mazda CX-5, battery that came with car was not holding the charge for long, so after some research on which battery to replace it with, I decided to replace it with ...
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Lexus CT200h “stuck” in neutral after accident

I bought 2018 Lexus CT200h with slightly damaged front and it won't shift into Drive or Parking. After I push Start button it shows me that the car is in Neutral. Trying to put it into Drive or ...
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Is it possible to repair a newer lithium ebike battery with freezing damage?

I leant my bike to a family member, and he put it out of use for the winter. Unbeknownst to me, he left the battery outside in -40°F weather all winter. I came to pick the bike up this following fall ...
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Can a battery get overcharged/how to prevent it?

When charging a battery with a charger or using no charger and putting one battery on another battery can the low battery or both batteries get overcharged in some way? What will happen to the ...
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88 views

Is it ok to charge battery inside car or home with no one in it?

I read that when charging a battery(charger to battery) or battery to battery(I imagine) a toxic chemical/gas is released from the battery. As such you should ventilate and not be in the home whilst ...
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1answer
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If driving doesn’t recharge a battery is there any point putting it on a charger?

Using a charger I managed to bring battery up to 12.18 volts or so. The car is starting up now and running however I notice on starting the battery falls below 10 volts(8.x or 9.x volts) and then ...
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Do I need a battery maintainer, a portable jumpstarter, or a completely new 12V battery?

Hybrid vehicle has not been used for several months due to COVID-19 pandemic. Vehicle has a 3 year old 12V AGM battery. Battery is not used as a true "starter" battery; it just boots the ...
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1answer
56 views

Is iPhone draining car battery?

If you plug your smartphone into your cars usb cable which is part of the stereo system I believe, I guess it’s charging itself whilst plugged in. Obviously you should not leave it in accessory mode ...
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1answer
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Will disconnecting battery lead to remaps being reset?

Civic Coupe VTI 1999. If car has been remapped, will disconnecting battery for a long time cause any remaps to be reset?
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What factors can make a battery appear better or worse than it is?

With regards to better, I know surface charge is one so best to leave it for a few hours and check. Not holding your multimeter properly. Would the battery being connected to switched off car cables ...
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How many volts would a battery with a dead cell show?

I read that a battery with a dead cell would not charge above 10.5 volts? However if each cell is 2 volts wouldn’t it be more correct to say a battery with a dead cell will charge up to anything ...
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Why is isolated car battery losing charge so quickly?

Battery had been left no start for months until I found it at 0.45 or so. Used a charger after an entire day it got to 2.95 volts. Then connected jump cables to the isolated battery and revved it ...
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Why did car just overheat and aftermath?

Hyundai coupe 2006. I tried to recharge a deeply dead battery by attaching jump wires from donor car directly to terminals of isolated battery(not in car). I kept the donor car constant at 4000rpm for ...
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1answer
157 views

Is it safe to drive a car without fixing battery in place

I was trying to change my battery but I overturned and broke the bolt that connects the rod to the frame which fixes the battery in place. Now I need someone to remove that broken bolt and give me a ...
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1answer
654 views

Will a battery with low amps work on a car which usually uses more amps?

I previously asked this question Can I use a higher powered battery? And seems everyone was saying it’s fine since both batteries are 12 volts. Though people mentioned if the car had lower cca it ...
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Bad alternator, or just a regular dying battery?

The battery in my car is dead, and I'm not sure whether it's the alternator's fault or just the natural death of an old battery. Vehicle: '04 Honda Accord. The alternator was replaced 4 years ago. As ...
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63 views

Can a dead battery be charged by directly connecting jump start leads to it?

I know you should be using a chArger and not jump leads as this can affect alternator etc if donor car. But still want to understand. If I add the jump cables directly to isolated battery terminals I....
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564 views

Tipping battery upside down or it’s side?

I have a battery that’s needs replacing but decided I would use the battery from my second car and put it inside because I’m thinking of selling it as is and just wanted to do some diagnostic work. I ...
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Affected sensors when boosting another car

I own a 2017 Kia SUV and periodically I'll give my neighbor a boost on their 2002 Liberty Jeep periodically, maybe once or twice a month, until they buy another battery. So I noticed a couple of times ...
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Trying to Charge Honda Fit 2015, Car's Headlights Flash Once Charging Starts

I'm not a car person at all, so thanks in advance for any help! My wife's 2015 Honda Fit hasn't been used for months (thanks to Corona). I'm trying to use a Schumacher SC1307 6/12V Automatic Battery ...
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1answer
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Can I use a 100AH battery instead of a 74AH battery in my Passat 2.0TDI, 2012

I want to use a 100AH battery instead of a 74 AH battery in my car

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