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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3answers
45 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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1answer
29 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 ...
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3answers
5k views

battery fully discharged, got a jump-start, but what do I do now?

My battery was fully discharged (forgot to turn off headlights for a few hours). The car wouldn't even unlock from the remote. What should I do after getting a jumpstart?
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1answer
142 views

EFB (enhanced flooded battery) I left the lights on for more than a week because of Coronavirus

I have a Renault captur 2016 vehicle with start and stop capability, the battery is EFB 70Ah 720A, I couldn't start the engine with cables connected to another standard battery of another running ...
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1answer
211 views

1995 Toyota 4Runner: White smoke, battery constantly drains

I own a 1995 Toyota 4Runner (I was told the engine was rebuilt, so I'm not sure if mileage matters). I got this from my grandpa around 2 years ago, which had been sitting at his house parked for over ...
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2answers
55 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 ...
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9answers
37k views

Why don't some modern cars automatically turn off headlights when stopped?

I forgot the lights on overnight on a 2016 Volkswagen Jetta and 16 hours later when I came back to the car the lights were still on but the car wouldn't start. Can't the car check the battery level ...
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1answer
269 views

Battery Draw while car is off at 3.24

I have a 2007 Saab 95 wagon... For about 6 months at random about once a month my car has been dead. After calling AAA and they told me there is a draw from the battery at apx 3.24 which is should be ...
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3answers
829 views

Depleted Honda Fit battery -- how long to recharge, how to re-enable radio?

I left the interior map lights (driver & passenger side lights) on for about 30 hours, depleting the batter in my Honda Fit. I could barely see the lights on. Fortunately, at least one towing ...
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1answer
276 views

SUV (05 Toyota Sequoia) won't start via jump anymore

Earlier this month, the latch on my back hatch door broke and the hatch wouldn't lock closed. What I hadn't realized was a rear dome was popping on and off when people bumped the truck and at some ...
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1answer
55 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 ...
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1answer
109 views

2004 Chevy Trailblazer, battery dies but engine stays running & other weird electrical issues

Almost all of my dash lights will come on, airbag, seatbelt, security, ABS, etc.. they all turn on, my battery light turns on, gages all go dead, radio goes dead, windows stop working, power locks ...
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2answers
2k views

Is a 13.07V alternator voltage too low?

I'm having some problems with a 2006 Mini One D (1.4 l diesel engine). About a month ago the alternator warning light turned on (it only turned off over about 4000 rpm). The belt looked good, so I ...
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0answers
30 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 ...
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1answer
40 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 ...
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2answers
1k views

How about how many amps does a vehicle pull at idle

Assuming the lights and stereo are off, how many amps can you expect an idling vehicle to pull? In this particular case I'm wondering about an F350, with flexfuel engine?
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1answer
142 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 ...
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1answer
787 views

Nissan Note 2012 battery drain

I have had problems with my 2012 Nissan Note (the boxy model). The battery would be flat after a couple of days, even when driving occasionally. After leaving the car parked and locked for 20min, ...
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1answer
5k views

Battery drops to 10.5 volts after charging

A few days ago, my 97 Corolla had trouble starting. It cranks but doesn't start, maybe due to a problem with the carburetor. Figured I might discharge the battery, so I stopped my attempts at starting....
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4answers
62 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 ...
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1answer
48 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 ...
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0answers
62 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 ...
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1answer
46 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 ...
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0answers
15 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 ...
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3answers
860 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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3answers
636 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 ...
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0answers
36 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 ...
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0answers
100 views

Car battery drain issue with Clock ON

I had the issue of the battery going dead in 12-13 days if my car(Chevy Beat LT) sits idle for that long. An idle current measured was 0.16A that gives around 13days to my 50AH battery. After removing ...
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3answers
2k 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 ...
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1answer
91 views

Is there a way to reliably test voltage of a 12V battery when it's not disconnected (i.e., partly loaded)?

I'm having an issue where a fully charged battery doesn't necessarily report the proper voltage when checked from the socket within the car, because in order to have the socket activated, the car has ...
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3answers
21k views

Does disconnecting the battery have negative side effects?

A recent answer at a sister site suggested disconnecting the battery routinely. I often disconnect my battery before embarking on a hike. Especially if I am in a remote location. This is a nice way ...
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5answers
10k views

What could be causing battery drain on a 2009 Honda Pilot?

My sister has a 2009 Honda Pilot that's got some issues with the electrical system. The battery frequently drains overnight (every other day or so). When driving a lot (several hours or more) the ...
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4answers
20k views

Car will not start & interior lights flicker whenever I try. No noise whenever I turn the key

2007 Hyundai Entourage Car will not start & interior lights flicker whenever I try. No noise whenever I turn the key. Took several attempts to jump it yesterday, but finally did start. Today I'...
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1answer
254 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 ...
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1answer
140 views

(VW CC 2010 2.0L Sport) How do you diagnose a parasitic battery drain from a fuse that controls rear window raisers and central locking system?

My 2010 VW CC is having a parasitic drain issue and I've isolated the problem to one of the fuses which is for the rear window raisers and for the central locking system. If I keep this fuse out ...
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4answers
39k views

Acceptable battery voltage drop overnight

This is a follow up to this question that I asked previously. Since asking that question, I have kept my same commute, but have been driving consistently 30+ miles on the weekend. In addition, I have ...
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0answers
19 views

New battery going dead

Bought a new battery for my truck it's a 1993 Chevy 3500. The battery tested good after two weeks it was dead. Every time I get into drive it I have to jump the battery. took it to a mechanic ...
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3answers
1k views

Car Stalls after about 45 mins to 1 hr of running

This is a challenge for mechanics. No one seems to know what's going on with my vehicle which is a 2007 Toyota Isis. If I turn off the car sometime it won't start again and i would need a jump start. ...
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1answer
737 views

Brand new lead acid car battery reads only 12.33v. Is it faulty?

Yesterday I purchased a brand new, maintenance-free, 12 volt lead acid car battery. Specs: 47Ah and 450CCA. Before I install it in my car, I measured the voltage with a catIII digital multimeter. It ...
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2answers
54 views

Older cars draining battery faster

I have vw golf 2004 that needs its battery replaced. The battery is four years old. The battery the car got when it was new lasted 8 years. My dad said as the car gets older it ruins the battery ...
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4answers
3k views

Minimum driving miles to keep battery charged (Honda Civic 2015)

I have a 2015 Honda Civic and I got a new battery for it about six months ago. Recently the car hasn't been starting and required jumps every morning to run. I took it to the dealership and they let ...
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2answers
113 views

Car battery won't hold a charge: can one estimate how much longer it will last? Or is it best to replace it?

I have a 12V 60Ah EFB battery in a 3-year old start/stop car. The battery doesn't seem to hold a charge. Is there any way to estimate / understand how much longer it can last, or if it's best to ...
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1answer
177 views

What is normal 12v battery current drain in run position with engine off?

My 2002 Honda Odyssey has a weak battery. It is at the end of its expected life and I will be replacing as soon as I can. The ignition switch has the following positions: 0 - Off I - Accessories II ...
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1answer
77 views

Jumping a car and attaching cables after starting donor car's engine

I was jumping my friend's car today in a place with no cell phone reception. He argued that the jumper cables should be attached after starting the donor car's engine. He said that it would decrease ...
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2answers
4k views

Car battery at 11.8v in the morning and 12.5v after 20 minute drive bad?

If my group 48/H6 70AH 120RC Led Acid car battery is at 11.8v in the morning and 12.5v after a 20 minute drive is it bad? My van and battery are only 10 months old but I do frequently use the battery ...
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5answers
59k 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 ...
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0answers
104 views

Battery drain - 2001 Chevy Malibu

I'm trying to troubleshoot a parasitic battery drain and need help. With all courtesy lights off, key out, doors shut, I show 1.5A of draw. The battery is dead within 24 hrs. I have pulled all fuses ...
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2answers
129 views

How do electric car batteries cope with the car standing idle?

I usually drive low-mileage runs and could easily charge an electric car at home. But what happens when I go on holiday? I charge the car at home, drive to an airport, then leave the car in a car ...
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1answer
228 views

Battery drained 10 amps with key in the dashboard - what can it be?

Old Honda Civic hatchback 1.4i, manual gear, air conditioning. No longer starting (see below the history). I noticed that with the key off or in the dashboard in position I there is a small 40 mA ...
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2answers
3k views

1999 Ford Ranger Battery Drain

I have had a slight battery drain on my Ford Ranger, enough to kill the battery after a few days of sitting. The battery is new. This is the troubleshooting I have done so far: Tested the battery ...