[TCB2022]

2021 CRV touring hybrid 12v battery not charging. Intermittent issue. Today is 4th time in two months dead battery in morning. And this is a two month ago replaced battery. Dealer shop not finding any specific problems. Anyone else have/had this oroblem?

 

[TCB2022]

Good advice.

We drive an average of around 20 miles a day. This new battery is one month old. (Had same problem two times with old battery).

Wife drove it 50 miles from home yesterday, then parked it at a mall. Came out 4 hours later and new battery was dead. Completely. After AAA jump she drove 50 miles back on freeway without stopping and it was dead again this morning. I charged it for 4 hours this morning and took it to dealer. They cannot identify any problems with battery or charging circuit.

I wonder if there is an intermittent loose short, connection or fuse somewhere.

Sorry, typo: new battery is two months old - not one.

Edited for clarity: both old and new battery deadness.

 

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Dealer shop guy says he checked for damaged wiring and did not find any. Very puzzling…

So, the electrical engineer in me is wondering if it is an intermittent master switch problem. This reminds me of my old 350 Nova SS dead battery on some mornings. The master key cartridge had an intermittent issue in it that left the car in auxiliary even though it was turned to off and the key removed. Took me a while to find that problem too.
Could the Honda master on/off push button key (for the lack of a better name) have a similar issue? Maybe the car isn’t completely turning off at times?

 

[TCB2022]

I gather the dealer checked for abnormal parasitic drain, as well as confirmed that the 12v battery IS getting charged during driving, yes?

Thnx for your quick reply. Yes, dealer tech said they checked for drains, and adequate charging voltage. The tests they conducted seemed extensive.

I suppose I need to get one of those meters. Like intermittent electrical problems everywhere they rarely show up when at the shop. Doh.

I looked on Amazon. Plenty of meter options. Do you know if there is a model that comes with memory? I didn’t see one. Would like to let it monitor voltage for, say, 24 hrs then download the data. The 12v socket is way down in the center cubby. Impossible to see while driving. Driving safely, that is.

Also, I like plots and graphs, TBH.

 

[TCB2022]

Update: williamsji, thnx for the recommendation. I installed the recommended battery monitor. App appears to be working correctly. So we shall see …

… says battery full to start with.

 

[TCB2022]

In case of idle curiosity:

Three days of battery monitoring. Nothing unusual or obvious that I can see - yet.

Three starts yesterday are obvious, and there is a slow 0.11v drop over 8 hrs between 1600 and 2400. Otherwise no obvious anomalies - yet.

I am curious what the transient 0.21v dip at 0200 yesterday might be.

I like this voltmeter. Thnx.

 

[TCB2022]

Update:

The voltage monitor is working as advertised. Here is a 15 day log.

Interesting that battery voltage drops 0.2v or so between drives.
Oh, a seque - the long tail at the end of the data is after we were rear ended by a stoner. High as a kite he was. No drivers license or insurance either. We have good insurance and no serious injuries so mainly a huge inconvenience. CRV not drivable. Shop says it may be totaled. If not totaled, shop backlog is 4 months. Sheesh. Good thing we have the ‘66 Mustang in the shed.
Thanks again for everyone’s help.