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The battery in my 2018 Toyota CH-R failed during inspection in 2/2020. Went through Toyota diagnostics and battery was replaced as it was still under warranty but could not find reason why it failed. Battery failed inspection again 8/2020. Again going through Toyota's diagnostic to find out if something is unexpectedly draining battery.
 

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How long are you letting the car sit? I assume when you say it went through Toyota diagnostics that a full electrical system check out was performed?
 

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The battery in my 2018 Toyota CH-R failed during inspection in 2/2020. Went through Toyota diagnostics and battery was replaced as it was still under warranty but could not find reason why it failed. Battery failed inspection again 8/2020. Again going through Toyota's diagnostic to find out if something is unexpectedly draining battery.
I have a similar problem. The first time the battery failed the car had sat in a car park for a week whilst on a holiday and battery was flat on return, just enough power to unlock the door. Car started instantly from a power pack. During lockdown if the car is left for more than 3 days it has a flat battery i.e.9.1 volts. It would take a charge and show 13 volts. However, after 3 days it would be flat. I have not been to the garage with it due to lock down. I purchased a mini power pack which has not failed to start the car.
i'd appreciate any comments on what the problem is. I do not think it is a battery problem. More like a drain from one of the facilities that sit in the background.
 

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This is correct. That's why I asked how long the car has sat without being started. As these cars get more and more complicated with electronics, the more power they will draw when "shut off". My BMW is a classic example of this. It's a 2013 and will drain a battery down in a week or so. If I know the car will sit for a while, I will put it on a trickle charger. The other way to avoid this if you don't have the ability to run a trickle charger is to disconnect the battery by removing the negative battery cable. When you're ready to start the car back up again, you can just reconnect the negative battery cable. Repeated and prolonged deep draining of lead acid batteries are not good. It will shorten the life of the battery dramatically.
 

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This happened to me as well, but I chalked it up to a few things:
  • Who knows how long that battery has been sitting before I bought it
  • I have a dashcam with cutoff voltage at 12.5, which should be SAFE, but it's still a draw nevertheless
  • Left it on a trip to Scandinavians for 1.5 weeks at a friend's apartment complex and it won't start afterwards.

But hey at least it's under warranty and so I know the current battery is good and I haven't drained it either.
 

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I purchased a brand new 2019 Toyota CHR and hardly use it. Having it sat for a week in my parking complex and it didn't want to start. Warranty made it possible to tow it to the dealership (got a new battery - no charge). I don't understand why this is happening to a new vehicle. Old vehicles never had this kind of problem. I've never heard of a vehicle been drained of battery for not using it. Heaven's forbid there's an emergency - you're stuck!!! Not liking this feature at all. What has anyone done about this? What are our options? Thanks.
 

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I purchased a brand new 2019 Toyota CHR and hardly use it. Having it sat for a week in my parking complex and it didn't want to start. Warranty made it possible to tow it to the dealership (got a new battery - no charge). I don't understand why this is happening to a new vehicle. Old vehicles never had this kind of problem. I've never heard of a vehicle been drained of battery for not using it. Heaven's forbid there's an emergency - you're stuck!!! Not liking this feature at all. What has anyone done about this? What are our options? Thanks.
My wife has a 2018 CHR and is suffering similar problems! The dealer which supplied it said, without checking anything, that it would need a new battery and refused to attend the house where the car was sitting, she would have to get it started and bring it to them (Toyota customer service?), that she should drive it every few days (even if she does not need to) and if she leaves it to go on holiday it may not start when she gets back (so much for parking it at the airport!)
Toyota said she could switch the car to 'ready' mode on the drive (but not leave the car unattended) for an hour every couple of days, the car will then run the petrol engine intermittently and keep the battery charged! What chance of it charging when the lights are always on and she would need the heater in this weather!
So much for caring for the environment and reducing her running costs!
Another dealership said there was nothing wrong with the battery and to get a solar charger which can be plugged into the power socket under the centre arm rest!
According to other posts this plug is not live when the car is switched off!
We have both been driving for over 50 years each, have had at least 30 cars and never had this before!
As far as my wife is concerned she has lost confidence in the car (she suggested throwing it in the nearest ditch) and Toyota generally though this is her second one.
 

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My wife has a 2018 CHR and is suffering similar problems! The dealer which supplied it said, without checking anything, that it would need a new battery and refused to attend the house where the car was sitting, she would have to get it started and bring it to them (Toyota customer service?), that she should drive it every few days (even if she does not need to) and if she leaves it to go on holiday it may not start when she gets back (so much for parking it at the airport!)
Toyota said she could switch the car to 'ready' mode on the drive (but not leave the car unattended) for an hour every couple of days, the car will then run the petrol engine intermittently and keep the battery charged! What chance of it charging when the lights are always on and she would need the heater in this weather!
So much for caring for the environment and reducing her running costs!
Another dealership said there was nothing wrong with the battery and to get a solar charger which can be plugged into the power socket under the centre arm rest!
According to other posts this plug is not live when the car is switched off!
We have both been driving for over 50 years each, have had at least 30 cars and never had this before!
As far as my wife is concerned she has lost confidence in the car (she suggested throwing it in the nearest ditch) and Toyota generally though this is her second one.
An update on the above.

Got a solar trickle charger but despite being told that the 12v power socket in the centre pocket is always live it is not therefore trickle charger is useless unless we raise the bonnet everytime we want to use it!
Took the car to Oakmere Toyota in Northwich Cheshire, they installed a socket in the car connected to the battery direct now we can put on the trickle charger everytime we get home. Still not happy with the speed of drain on the battery but this seems to be a solution! Toyota take note, put a charging socket in the car!
 

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I’ve got the same problem now with a 2020 orange edition only done 3k miles. Taking it to the garage next week. Looks like something is draining the battery as had a 2017 limited edition and didn’t have a problem with similar use. Wondering if it could be the dash cam we had fitted?
 

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The battery in my 2018 Toyota CH-R failed during inspection in 2/2020. Went through Toyota diagnostics and battery was replaced as it was still under warranty but could not find reason why it failed. Battery failed inspection again 8/2020. Again going through Toyota's diagnostic to find out if something is unexpectedly draining battery.
We had the same issue with my wife's CHR hybrid last year, 1 dealership wanted to change the battery without testing it another tested it and reported that it was fine. The problem occurred three times and it was recommended that we should sit on the drive with the car in ready mode for a hour every few days (Toyota) (in sub-zero temperature I think not) another suggestion was to use a battery charger (difficult with the car on the drive!) another suggestion was a solar charger which we bought, paid a Toyota dealership to install a wire into the cab so we did not have to attach to the battery. Everything was OK then after a period of dull weather the battery was unable to start the car AGAIN. When we got it going I noticed that when the charger was fitted and the sun was shining the interior light came on even with the doors closed! The only way was to switch the curtesy light off so it does not come on when the doors are open!

I am not clever enough to check but wouldn't the fact that the light was going on even when the door was closed suggest an open circuit past the door switch, perhaps not big enough to bring the light on but enough to drain the battery over a period of time. Someone with the correct knowhow could problem check!
 

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Spoke to the service department about battery going flat and they told me that we may need to run the car twice a week for 1hr at over 30 mph . What a joke in these times when we are in lockdown. Was never told this when I purchased it as they sold it to me on how good it was running around town, and I don’t know any town where you do 30mph for an hour going to work. Had a CHR first in 2017 and never had a problem with the battery and that was only mostly used going to and from work a round trip of 4 miles . So that blows that out of the window. Cannot wait to hear the next reason why battery keeps going flat as feed up with having to call out AA to go anywhere.
 

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Spoke to the service department about battery going flat and they told me that we may need to run the car twice a week for 1hr at over 30 mph . What a joke in these times when we are in lockdown. Was never told this when I purchased it as they sold it to me on how good it was running around town, and I don’t know any town where you do 30mph for an hour going to work. Had a CHR first in 2017 and never had a problem with the battery and that was only mostly used going to and from work a round trip of 4 miles . So that blows that out of the window. Cannot wait to hear the next reason why battery keeps going flat as feed up with having to call out AA to go anywhere.
I have raise the issue with Toyota who have been of no use! I wonder if they have factored in the waste of petrol in all the glorious advertising about their environmental claims I have noticed that the fuel consumption figures have dropped dramatically.

We had a dashcam fitted by the dealer and had been thinking that might be the drain given that it had a bump sensor which presumably is always active. I have asked for a comment from the a dealer (and possibly Toyota) in response to what I said in my earlier posting

Peter
 

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We also had a dachshund cam fitted, at present I’ve started to unplug it when not required to see if anything happens. What I’m struggling to understand is that from February 2020 to December 2020 no problems, the car was used probably once or twice a week. So this proves to me that there most be something different going on
 

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Got the car back from having battery charged/ tested as with most people garage said no problem with battery and that the reason it keeps going flat is lack of use. Have had solar trickle feed fitted directly to the battery. If this resolves the issue I will let you know.
I have a friend who had a similar problem with a car that used to sit around a lot and this resolved his problem which makes me quite confident that it will work. But I would suggest that Toyota consider having one of these incorporated into the car design as they promote the environmental benefits of hybrid motoring. Anybody have a thought on this?
 

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I have a 2018 CHR with a dead battery. The battery was replaced on 12/28/2020 - My garage is heated so I know its warm enough. My car did not start two days ago. Toyota Roadside assistance is out of service as they are based in Texas. I called my AARP Allstate and they towed the vehicle to the dealer. They left the car outside all night and now the battery is frozen. It is still frozen today. I found a replacement battery at another dealership which is the same as the frozen battery. I think something is causing my battery to fail. I have a front and rear dash cam which the dealer had installed. I have had my transmission replaced due the wining noise.
 

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I have a 2018 CHR with a dead battery. The battery was replaced on 12/28/2020 - My garage is heated so I know its warm enough. My car did not start two days ago. Toyota Roadside assistance is out of service as they are based in Texas. I called my AARP Allstate and they towed the vehicle to the dealer. They left the car outside all night and now the battery is frozen. It is still frozen today. I found a replacement battery at another dealership which is the same as the frozen battery. I think something is causing my battery to fail. I have a front and rear dash cam which the dealer had installed. I have had my transmission replaced due the wining noise.
Let me know if you are in the US or Canada - what state? I'm in Minnesota.
 

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It’s now been 3 weeks since we had a solar trickle charge fitted and we haven’t had a flat battery. Hopefully this will continue.
 

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I don't want to speak badly about the manufacturers or the revision center that you went to, because I don't know them personally and it's not my place to make assumptions, but I'm going to tell you about a similar situation that I had. I have a 2016 CHR and I think I might have gone through three batteries until I finally decided to get an original one directly from the Toyota manufacturer. I got the exact one that I saw was recommended on Recommended Batteries For Cars. and I haven't had any issues since. The previous times I just used to buy through the repair shop that I went to, and it was not a smart decision, because the batteries were usually just big scams.
 

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I came across this thread some months ago while investigating the dead battery issue for my father who has had to rely on a booster battery to start the car quite often since he doesn't drive it every day. I joined now just to let you know of one possible solution t think hasn't been mentioned yet, since it seems to have fixed the issue for him.
The last service shop he took the car to get the issue fixed instructed him to disable the keyless doors/start features from the car setup and after he did that, the battery hasn't died even once in past two months.
Maybe this will help someone else too.
 
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