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Questions tagged [battery-drain]

A loss of electrochemical potential between positive and negative terminals a car's battery, creating a loss of power, sometimes to the point of being unable to start the vehicle.

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2000 Ford F150,,parasitic drain question

What causes the radio to come on when reconnecting the battery? Also what could cause a 9.29 amp parasitic drain when parked and all accessories are off? Any replies are greatfull.
Jim Stevens's user avatar
1 vote
1 answer
29 views

Can a portable jump starter drain my car battery if being used for something else?

I’ve recently went to my dealership to take a look at my battery that I purchased not that long ago and was still under warranty. Well person says that what’s draining my battery is my dash camera, ...
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3 votes
2 answers
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Battery Voltage drop

I want to install a new stereo for my car which requires 12V. I tested the battery first it and shows 12.29V but when I started the car the battery became 6V. Is this normal? What am i doing wrong?
walter's user avatar
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jump starting car: why wouldn't jump start work when bad battery is more depleted

Please see pic. I was able to jump start on day 1 on first attempt. After the bad battery depleted more over the weekend (day 3), I was not able to jump start easily. I kept trying for 30 minutes, ...
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Why is my car wont start

My mechanic changed my ecm and programmed it to my 2001 buick regal he programmed both sets of keys i have now all of a sudden car will crank but wont start also battery keep draining. Before he ...
Donna Beal's user avatar
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19 views

2008 scion tc electrical issue

Hey there I have a 2008 scion tc manual transmission. I’ve ran into the problem of the car reading 12v at idle, 11.5 when lights and heat are on and 10.9 when driving. I checked that the alternator is ...
Jay sanz's user avatar
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0 answers
52 views

Alternator doesn't charge the battery when idle with head lights on

My car is a Mitsubishi Magna TH 1999 3.5L Auto. The alternator gives no voltage at idle with headlights & fan on. The battery gets drained. The alternator warning light pops up. If revved a little ...
Raj's user avatar
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1 vote
2 answers
581 views

How do I fix a parasitic power drain on 2018 Mitsubishi Outlander Sport

I am reaching out desperately looking for help. I purchased this vehicle in April of 2022 and have been through 5 batteries. I tried contacting the dealership and they told me that the battery wasn’t ...
Savanah Morton's user avatar
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107 views

I have Honda Accord 2018 Touring , Navigation Display Screen not working

I have Honda Accord 2018 Touring, my brother mistakenly reversed the connections to the battery terminals and now the the Navigation display screen won't power on.
Matthew's user avatar
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27 views

Battery drained in overnight

My new car bedtime t99 battery got drained in overnight now no display all dead, I tried jump start but shows svs light what is it major problem
Fred Fernandez's user avatar
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113 views

Car battery fried after 2 1/2 months

I replaced my car battery for my Corolla in mid March. Last week it was completely fried. I went to start it and it had zero juice. AAA came and jump started it with their battery pack starter. I left ...
J Dilly's user avatar
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2 votes
1 answer
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What would cause battery level to suddenly drop about a day after it was driven?

Every few months we have an issue where the battery in my 2006 Audi Avant dies. I've taken it to a battery place and they say that it's perfectly healthy. So I bought a BLE battery monitor and now I'm ...
guidoism's user avatar
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Should 7.5A "Air Con" circuit draw amps while vehicle is off?

I believe that my truck (1999 Nissan Frontier SE 3.6L) has a parasitic draw issue. Was going through the fuse box checking voltage, the "Audio" 15A circuit had full voltage, which I believe ...
Tyler N's user avatar
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1 answer
39 views

Battery drains in daily use

my car battery goes flat weekly, even though my alternator output is constant 14.3 Volts. The battery voltage does not drop during the night, however, it decreased significantly by afternoon, as if ...
Dan's user avatar
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1 vote
2 answers
540 views

How much does disconnected new car battery lose charge over a day?

I have a new five-month old (yes months) battery that is not keeping charge. I disconnected and charged the battery overnight using a trickle charger. I got the bad battery indicator on the charger. ...
user3236841's user avatar
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2 answers
473 views

What is the typical battery power consumption of a parked car?

My car (2014 Opel Zafira-B) has some weird electrical issues where it randomly and suddenly drains the battery, sometimes while driving. While diagnosing the issue I also measured the power drain when ...
AndreKR's user avatar
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2 answers
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Car wont start even though battery charger says it is fully charged

I have a 2010 ford focus ran and drove just fine 2 days ago, i went out to start it today and nothing. There were no dash or internal lights on at all when i turned the key still nothing no noise at ...
Jaxx Carr's user avatar
3 votes
1 answer
72 views

Radiator cap, / coolant flange and battery drainage issues

I wanted to enquire regarding some work that my mechanic carried out recently. All issues appear to be resolved now but I need to assess what happened at each stage. Apologies in advance for the long ...
Christianp's user avatar
-1 votes
1 answer
839 views

Will OBD2 Hud Head Up Display drain car battery if left plugged when car is off?

I am buying a HUD Head Up Display. It goes in Sleep Mode when ignition is off (screen turns off). I asked the manufacturer, they said it uses 0.3mAh when in Sleep Mode (400mA while in use). Is this ...
Antonis's user avatar
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1 answer
206 views

Toyota Tacoma 2006 battery drains when started but returns to 11.8V when not running

2006 Tacoma 6-cyl 4x4, and the battery is 3 years old. Truck would not start this morning, so I checked the voltage - 11.8V. When I cracked the ignition, it just clicked. To me that usually means a ...
Erik LaCoste's user avatar
1 vote
1 answer
580 views

Micra K12 Start/Electrical Issues

My partner's Micra SE (2006) has had starting/electrical issues for a while now. Multiple mechanics have diagnosed bad batteries and replaced with the problem returning within days/weeks of the ...
Daniel D's user avatar
2 votes
1 answer
402 views

How to get a rough approximation of how long it would take to discharge battery almost fully when keep ignition on?

I want to do a simple 'test' to see if my motorcycle battery is draining too fast. I've heard that if you keep motorcycle ignition on over night, it will drain. But I could not find any single source ...
Vikas's user avatar
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0 answers
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Battery drawdown

I have a 2014 dodge ram. The battery goes dead after a few days of not driving. Replaced battery twice. Checked for draw down and found a 2.3 Amp draw down. My radio had stopped working a couple ...
Steve's user avatar
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2 votes
0 answers
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How can I diagnose the cause of a flat battery?

Two days ago I could not start my car. The battery seemed flat. I seldom use my car and when I use it I only drive short distances. I carried the battery home and charged it with a smart charger. ...
Andy's user avatar
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1 answer
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Battery dead after track day but everything working

Car: BMW M3 (2006) I went to a track day (HPDE event where I drove the car on a road course at its limit for the entire day) and at the end of the day the car wasn’t cranking. I push-started it and ...
user3829017's user avatar
5 votes
4 answers
5k views

Nearly drained battery for 2 weeks - how much damage was done?

I recently made a mistake of starting my car, and only driving it for a short trip multiple times in below-freezing weather without letting the car fully warm up. This was after the car had sat for ...
slothstronaut's user avatar
1 vote
1 answer
440 views

Changed out radio and getting battery discharge error when engine running

So today changed out my Kia radio that was in my Kia Forte 2020. Seems my country brought in the low spec model at the time. This is the old radio: I changed it out to the touch screen that usually ...
Javy26's user avatar
  • 113
1 vote
1 answer
863 views

Why is my Volvo XC60 Battery discharging to 6V when parked for 2 days (dead flat)

I have a 2014 Volvo XC60. A mechanic recently replaced the (main) battery with a (non-Volvo) Century battery (AGM-type 12v lead acid, 70Ah). I parked the car in the garage for 2 days and the battery ...
Rhett's user avatar
  • 11
1 vote
0 answers
287 views

Car horn's relay always in switched on position;could it be the reason for total battery drainage if car is not started for 2 days

(MG Hector plus petrol automatic-1 year old). My car's battery was suddenly getting drained in just 2 days of not using the car. This happened twice. I took the car to the service centre and they said ...
Hello Hector's user avatar
3 votes
2 answers
2k views

Battery implication to keep doors open while engine is off

Can there be significant battery draw if I keep the doors open while the engine is turned off? In my case I park a minivan (Town&Country 2016, although I'm asking more in general, not specific to ...
IsaacS's user avatar
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Lithium vs lead-acid motorcycle batteries: which lasts longer in the winter? Lower capacity vs lower discharge rate?

My question I would like to understand a bit better the pros and cons of lithium vs lead-acid 12v batteries for a motorcycle, especially during the winter. Yes, I know, google is your friend, and I ...
Pythonista anonymous's user avatar
0 votes
3 answers
3k views

Two day old car battery voltage is reading 3.6v

Purchased a brand new vehicle on Saturday, drove it around 60 miles total (so, plenty of time to charge a low battery) and this morning it was dead. I checked with two multimeters because I didn't ...
Ryan Detzel's user avatar
1 vote
0 answers
43 views

Mazda 6 2014 sport

The last week in a half my Mazda 6 has been having issues with starting at first you could hear it would have a tough time starting like there was not enough power going to the car to get it going but ...
Robyn Wilfley's user avatar
1 vote
3 answers
3k 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 ...
mitchkman's user avatar
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1 vote
2 answers
605 views

Car Battery left sitting over winter, wont hold a charge

2009 toyota matrix has not been driven regularly since 2019 when it got a new battery. Since then we have removed the battery and stored it indoors (not on a trickle charger) for winter then in the ...
James_B's user avatar
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0 votes
0 answers
104 views

2003 Honda Civic EX won't start

I have a 2003 Honda Civic EX and it won't start if you disconnect the battery negative then positive let it sit for a couple minutes then reconnect it positive and negative you get all the lights back ...
Gerri Hampton's user avatar
1 vote
1 answer
267 views

Car alarm - parasitic drain and ringing?

I have a Honda Prelude 1998 with the following symptoms: keep the fully charged battery connected for 2-3 days without driving and it goes almost flat (disconnect it and the charge stays for weeks at ...
Roco CTZ's user avatar
1 vote
4 answers
212 views

Vehicle dies for a couple minutes when I try to start then turns back on

I have an 02 Chevy Trailblazer I went to start my vehicle up like normal before work. When it was in accessory it was fine but when I tried to turn it over, it all went black. There was no power at ...
pickle_rick95's user avatar
0 votes
1 answer
701 views

Battery drain but multi meter shows it doesn't

I have a Honda Prelude 1998 and if the battery is connected (with car off), after 2 days it is mostly drained. If I recharge it and disconnect the battery, it has a good charge even after 10 days (I ...
Roco CTZ's user avatar
0 votes
0 answers
87 views

Car that I drive regularly has flat battery, bad alternator?

A car that I pretty regularly drive everyday has just had it's battery run flat. I had just got back from a 30 minute drive and 10 minutes later tried to turn it on and it just kept cranking like a ...
Vehicular IT's user avatar
0 votes
1 answer
3k views

What causes car battery to hold only 5v?

One of my cars was parked for a few months and it couldn't start after that. I could jump start the car and gave it some good drives (2hrs in total) to recharge the battery. However, that didn't help ...
user1589188's user avatar
1 vote
1 answer
671 views

parasitic battery drain on my 98 jeep cherokee

I have an amp draw of .85 tested from my negative battery cable on one lead and the neg. post on the other lead of my multimeter, I have removed every single fuse and relay and unplugged every single ...
Darla Bondy's user avatar
0 votes
0 answers
103 views

Hyundai battery drain

My car battery drain i checked all the fuses with series connection of ammeter in battery negative always showing 0.85A what is the reason can any one please tell me. My car is HYNDAI I20 Magna 2012 ...
JAYARAMAN S's user avatar
5 votes
3 answers
2k 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....
Resquiens's user avatar
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1 vote
2 answers
2k views

Mitsubishi Outlander Parasitic Draw

I have a parasitic draw of 280 milliamps with everything turned off and my key fob 15 feet away from the vehicle. I latched the hood latch just in case there is a sensor in it. I pulled all fuses ...
Brian LeCrone's user avatar
3 votes
3 answers
10k views

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 ...
apt45's user avatar
  • 131
1 vote
0 answers
51 views

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 ...
Jeff's user avatar
  • 81
1 vote
3 answers
14k views

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 ...
public wireless's user avatar
0 votes
1 answer
59 views

Car battery drainage

I own a 2007 Ford Focus SE 2.0 My question is would you happen to know the reason why my battery (which is brand new) is always dead. I constantly have to disconnect the battery in order to be able to ...
Lorraine Quintero's user avatar
0 votes
1 answer
1k views

2019 Kia Forte has a dead battery

I tried to start my car and got nothing, the battery was reading 11.4 volts, so I waited until some people woke up to show them what it was doing, when I tried again. This is when I noticed it ...
user38183's user avatar
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