Avalon 2013 - Battery Runs Down Overnight Without Driving

I have a VERY intermittent problem with my 2013 Avalon. For the last two years in the months of Jan.- Mar. Sometimes (perhaps twice a season in Winter) When I leave the car sit for over 1 evening in a heated garage without driving it, the battery goes dead. I can charge the battery for an hour then get the car started, take it to the dealer and they can find nothing wrong. Even replaced the battery last year which solved it until the winter months set in 9 months later and now it's doing the same thing again.

I think that some accessory or something may be sticking on like the seat heaters or headlights, on those rare evenings when I don't think to check on it after I shut it off. Whatever it is, it's drawing a lot of current to deplete a new battery in 24-48 hours.

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Prius (2004-09) :: Hybrid Battery Is Low Overnight

My hybrid battery has been running low the past few days. This has never happened before, but it has been around 90 degrees out during the same few days. I noticed it this morning as I left for work. It was down to two bars when pulling out of the garage. I was getting pretty nervous, but at least the ICE was charging it. Although, it never fully charged the system, as I live pretty close to work. On the way home, I tried to drive around for a mile or so to see if I could get the battery fully charged.. The best I could do was four bars. Is this typical of the hybrid system in warm weather? Should I be worried about it? Also, the system has a fan, why doesn't it come on if the hybrid battery is so temp sensitive?

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Prius (Gen 2) :: Traction Battery Loses Charge Overnight?

I see this was discussed back in 06 but not resolved. Maybe more owners have had additional experiences with this.

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Prius (2010-12) :: Battery Charge Down To 4 Bars Overnight

Should I be concerned..I have been noticing my battery is charging down overnight. I checked and all lights are off. It does charge immediately in the 10 mile I drive to work..but I am concerned why overnight it should be discharging.

Another Question - The right/left indicator sound is very muted..is that normal? Like, if I have the indicator on to merge into traffic, I am not sure it is as I can barely hear it chirping..

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Phaeton :: Key Battery Empty Notice Arrives Regularly

We get a flat tyre notice at least once a week. ( Checked the pressure with the gauges from two of our other cars.) NO FLAT. Pressure as when previously checked.NOT FROM COLD WEATHER. Our temperature here in South Florida stays fairly constant.

The "Key Battery Empty" notice arrives regularly, and we change the battery [2032] just as a precaution and the message again appears.

The 2004 W12 is still under 'warranty'.

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Prius (Gen 3) :: Battery Looses Charge From 7 Down To 2 Bars After Overnight Parking

Is it normal that over night parking battery looses charge from 7 bars down to 2 bars? I never lock the car and leaving my key in it.

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Prius (2010-12) :: Auxiliary Battery Drained Overnight Twice Within One Month

I just bought a certified 2010 Prius and have had it for 3 months now. Twice within one month, there was absolutely no power to start the car because the aux battery went dead overnight. I'm pretty sure I didn't leave any lights on and don't think I did anything differently when exiting the car for those 2 times. I took it into the dealership, and they couldn't find anything wrong. They said the battery was good. What is draining the battery overnight?

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Prius Plug-in 2012-15 :: 2014 Battery Drained Although Charged Overnight

I went to drive to work today and found that my battery was drained. None of my interior lights were on and I'm 100% sure I turned the car off last night after I backed it into the garage. Last night I drove the car home and was mostly on EV, but drove the last 3-4 miles on ICE. I had the car charging overnight too. This morning, with the battery dead and the cable plugged in, it was making a click sound near the fuse box when I tried to start it.

The passenger seat's heater was on (I think) and I don't think any of the doors were ajar. The only door that could have been opened would be the driver's but I don't think it was half closed.

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Prius (2004-09) :: 2008 - Running Roughly - Hybrid Battery Drains Overnight

So I got a 2008 model, only owner. It has 107K miles. I've noticed something the last couple months now. When I park the car in the garage after coming home from work it has a full charge, about 3 bars below top, it's at the max of the blue color.

When I start the car in the morning it still displays the same level. But after driving down the road about 3 blocks it seems to update slowly and drops the level, sometimes down to the brown, about 3 bars high. The car will run rough for a while almost every morning now since it's not using the hybrid battery to smooth things out.

Ever since owning the car I've noticed it can run rough sometimes normally, like when you're at a train crossing and the battery drops to 2 or 3 and the engine powers on to charge it up a bit. When I drive away you hear the engine a lot louder than usual as it seems to be running on engine only until the hybrid battery gets sufficiently charged and you feel a lack of power as you accelerate.

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Prius (Gen 3) :: AC Turned On And Battery Runs All The Way Down To Two Purple Bars

Lately when I turn the AC on my battery runs all the way down to two purple bars. The temp here is hot and it happens when I'm traveling at low speeds. The battery finally gets back up once I drive faster.

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Prius (Gen 3) :: Hybrid System Overheat Warning Light Comes On Regularly

Last summer I had a catastrophic experience on a family vacation when my wife's 2012 Prius overheated on the highway and lost power. The dealer that we limped into kept it for a week and couldn't find any concrete problem, except to say that since it was a salvage vehicle rebuilt without Toyota brand parts, that all of the cooling system would need to be replaced. I waited until we barely made it home and had my mechanic replace the inverter pump.

Since then the "hybrid system overheat" warning light comes on regularly, especially when driving up a long climb, even in moderate weather. There are no codes. Is it possible that there is air in the lines? My mechanic says that it feels like the inverter pump is working, tho I don't see turbulence in ready mode. A link to bleeding the air?

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Prius (Gen 3) :: Battery Cooling Fan Constantly Runs At Every Highway Trip

The past week I have noticed my battery cooling fan running constantly on all highway trips - 20 mile one-way trips going 65-70MPH.

The performance of the battery doesn't seem be degraded, but it seems like the battery is hopping more between charging cycle or whatever you would call it , where you watch the instantaneous MPG on the highway drop down for 10 seconds to 40-50, then back up to 60-70.

The car is a 2011 Prius III. It did not run like this earlier in the summer in the same weather conditions, I would hear the fan maybe once every few weeks in hot 90 degree weather. Now I hear it constantly. This is my first summer owning the Prius so this may be normal, but I wanted to double check with you all if this is a sign of premature traction battery death or something.

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BMW 3 Series :: 1999 - Battery Going Flat Overnight

I have a 1999 bmw 318se and the battery is going flat overnight and i cant find the problem. I have just fitted a new battery and checked all he lights and functions inside the car and they all seem to be working ok.

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Ford Excursion :: Drain On Battery Overnight?

What the approx current drain on the battery in an over night situation. Mine now is approx 340 mA and need to confirm this as correct!

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Prius (Gen 2) :: Brake Pump Runs All The Time - Battery Drains Super Quickly

Purchased a 2006 prius not too long ago with just over 100k miles.

I like the car, I average about 42-44 mpg. It is really for my commuting. The question I have is it seems like my brake pump runs all the time. When I take my foot off the brakes, it runs, when im in a drive-thru, my battery drains super quickly, however if i put in park instead of leaving it in drive while in the drive-thru, it does not.

My only thought is there is something wrong with my brake pump and the way it drains batteries.

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Lexus GS 2013+ :: Battery Drained Itself Overnight For No Reason

I went to start my GS in the garage this morning and nothing happened. I couldn't even open the trunk or turn on any interior lights. I checked the battery with a multi-meter and it shows 5.25V. So for whatever reason, the battery drained itself overnight. I'm positive no lights were left on or doors left open. So this is a total mystery to me.

What might have caused this? Also, how to open the trunk after the battery dies. The car has been great for the first 7k miles and problem free until now.

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Caravan/Voyager :: 2003 - New Battery Goes Dead Overnight

I've tried putting new batteries in my mini van and the battery goes dead after a day or 2. I've had it to the dealer before and they said it's a bad battery. which clearly it's not. I had a meter between the grounds on the battery and pulled all fuses under the hood and no change. I'm a quadriplegic and it's a nightmare when I go out with my aid to go to a doctors appointment and my van is dead. I don't have any money for the dealer again. I don't think the chrysler dealer even looked at it and took advantage of my situation. Its a 2003 Town country with only 29,000 miles. could it be the alternator drawing power when the car is off?

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Civic - Honda :: Battery Gets Almost Flat When The Car Is Sitting Overnight

I have a 2007 honda civic lx 4doors my problem is that when the car is sitting overnight the battery gets almost flat when I drive the car in the day everything is perfect I get test the battery starter n the alternator everything is find what is the problem here....

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Prius (2004-09) :: Hybrid Battery Runs Flat Every Morning - No Electric Power To Accelerate

It's been like that for a a while now. Every morning the hybrid battery would run down to last bar. When I start the car it would be 3/4 full and it would keep draining even though I'm on flat road.

The overall mileage has not changed much but its annoying with the battery goes to last bar and there's no electric power to accelerate.

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