Car Battery Drain - Unplug Cell Phone Charger

ShyGirl

Active Member
Hubby went on business trip and left the cell phone charger plugged in on his truck.

Leaving for work this cold morning, I noticed the rear tail light and dashboard lights were blinking. Once I unplugged cell phone charger, it stopped.
 

DEEKAYPEE8569

Well-Known Member
Hubby went on business trip and left the cell phone charger plugged in on his truck.

Leaving for work this cold morning, I noticed the rear tail light and dashboard lights were blinking. Once I unplugged cell phone charger, it stopped.

Did the blinking stop after you plugged the charger back in, after letting the truck run a bit to recharge the battery? How long had the truck been sitting with the charger plugged in?
Even a cell phone that is plugged into a 12v cig lighter can drain a battery if left for an extended period; even faster if it's cold like it has been. This must be an older truck. Many of the newer car's/trucks' cig lighters/accessory jacks now power off with the ignition switch to prevent this.
 

getbent

Thats how them b*tch's R
My car has two cig lighters, one works even with the car off and one only if it's on. I plugged a charger in that charges my camera battery while at a softball tournament. We were there for about 5 hours. My daughter went to the car a couple hours in and said she couldn't get the door to lock using the remote. She had to manually lock it. I went to the car later, same thing. Hmmm. When we went to leave, battery was dead. That's the only thing I had plugged in. Never had a problem since then. Who knew?
 

DEEKAYPEE8569

Well-Known Member
My car has two cig lighters, one works even with the car off and one only if it's on. I plugged a charger in that charges my camera battery while at a softball tournament. We were there for about 5 hours. My daughter went to the car a couple hours in and said she couldn't get the door to lock using the remote. She had to manually lock it. I went to the car later, same thing. Hmmm. When we went to leave, battery was dead. That's the only thing I had plugged in. Never had a problem since then. Who knew?

The camera drew A LOT of amperage, apparently.
 

getbent

Thats how them b*tch's R
The camera drew A LOT of amperage, apparently.

That's what I was thinking. It never dawned on me that would happen. I have a pretty basic camera too. Maybe it was the box I inserted the battery in then the plug plugged into that.
 

DEEKAYPEE8569

Well-Known Member
Key-Off Battery Drain

That takes an extended period of sitting dormant; like keeping a car in storage without a "battery tender." I know you know that; but draining a battery charging a camera? That could happen if the ignition switch was in the "ON" position for the length of time mentioned and other things like fan motors or some other accessory was also on. Even prolonged use of accessories with the key in the accessory position will drain a battery; it just takes a tad longer because there aren't multiple 12v draws on the battery; usually just a radio/CD/tape player; no power to electric windows or fan motors. Just puttin' it out there. :whistle:
 

getbent

Thats how them b*tch's R
From what I know, nothing else was on. My car beeps if the ignition is in the ON position and you walk away with the key. It didn't beep. I haven't used that charger again. I just try to make sure I charge my camera battery the night before now.
 

DoWhat

Deplorable
PREMO Member
That takes an extended period of sitting dormant; like keeping a car in storage without a "battery tender." I know you know that; but draining a battery charging a camera? That could happen if the ignition switch was in the "ON" position for the length of time mentioned and other things like fan motors or some other accessory was also on. Even prolonged use of accessories with the key in the accessory position will drain a battery; it just takes a tad longer because there aren't multiple 12v draws on the battery; usually just a radio/CD/tape player; no power to electric windows or fan motors. Just puttin' it out there. :whistle:
Never mind.
It is still KOBD
 

DoWhat

Deplorable
PREMO Member
Never mind.
It is still KOBD

Not to change the subject but.
I have an older vehicle to when sits over a few days the battery is dead.
Took the battery in for load test and they said it was good.
Alternator voltage checks good.
Now I am try to diagnose for key off battery drain.
I found this: http://www.aa1car.com/library/battery_runs_down.htm

Will try it this weekend, but any other good checks?

Edit:
And prior to this happening I smelled something burning and noticed the radio doesn't work.
But I was thinking when something burns up it would create an open. I can check that by pulling the fuse.

Yes, I found the problem, I hope.
Hooked up the meter and the battery was drawing 176mA.
Pulled the breaker for the radio and it dropped to 15mA.

http://forums.somd.com/threads/306099-Mazda-Miata-question/page3
 

ShyGirl

Active Member
Did the blinking stop after you plugged the charger back in, after letting the truck run a bit to recharge the battery? How long had the truck been sitting with the charger plugged in?
Even a cell phone that is plugged into a 12v cig lighter can drain a battery if left for an extended period; even faster if it's cold like it has been. This must be an older truck. Many of the newer car's/trucks' cig lighters/accessory jacks now power off with the ignition switch to prevent this.

The blinking stopped after I unplugged the charger. I didn't have time to mess with it.
 

dgates80

Land of the lost
How old is the battery? It may just be showing signs of age, and this cold snap exacerbates it.

Agree, temps this cold are hard on batteries. I had a "no start" when we had the first hard freeze a month or so ago, car had started fine with no signs of electrical problems.... Then at 25 degrees, the ol' wah-wah-wah click click click. 10 minutes on the charger and started right up, but I took the battery charger and a 100ft cord to work. Sure enough, another no start at work.

Replaced the battery the next day. No problems since.
 

RPMDAD

Well-Known Member
Agree, temps this cold are hard on batteries. I had a "no start" when we had the first hard freeze a month or so ago, car had started fine with no signs of electrical problems.... Then at 25 degrees, the ol' wah-wah-wah click click click. 10 minutes on the charger and started right up, but I took the battery charger and a 100ft cord to work. Sure enough, another no start at work.

Replaced the battery the next day. No problems since.

Yep, i agree dgates. I bet there will be a lot of dead batteries over the next couple of days with these low temps.
 

BOP

Well-Known Member
I get my car batteries checked every year and replaced about every 4 years. It just kind of works out that way.
 
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