2018 battery, surprisingly doing well

[Thomby]

Today, I very much expected to have "difficulty" starting... But to my pleasant surprise, It fired right up

Sounds like a little bit of a slow crank to me...but I guess the real question is, what did your voltage return to after some driving?

I'm guessing you don't use or care about Coasting mode (and have ISG disabled)...

 

[D.J.]

Sounds like a little bit of a slow crank to me...but I guess the real question is, what did your voltage return to after some driving?

I'm guessing you don't use or care about Coasting mode (and have ISG disabled)...

I used the alternator to charge the battery for about 2.5 hours, and then 6 hours later it's at 12.51v (The state of charge (SoC) in the image below is merely an estimate based on voltage & a lttle Nernst Equation adjustment for temperature, it's not a real valid SoC).


See the voltage tapering off... It will probably get down to 12.3 in a few days.


I made a homemade module to toggle ISG off - and brake hold on, each drive cycle, several years ago. So my ISG defaults to OFF, and my brake hold defaults to ON

 

[D.J.]

Sounds like a little bit of a slow crank to me...

Definitely a slow crank, down to 8.86v

I was surprised it started at all.

 

[Snowwhite]

Continuing as a with my battery abuse/neglect...

I just got back from probably my last vacation

why your last vacation?

 

[D.J.]

why your last vacation?

My health is declining rapidly, despite being only 47 years young.

 

[Snowwhite]

My health is declining rapidly, despite being only 47 years young.

sorry to hear.

 

[Volfy]

Here's the OEM AGM batt in our 2019 base. Starts and holds charge well enough that most owners wouldn't bother to think there is any need to look at replacing. However, my battery analyzer tells a different story - still serviceable but in the twilights of its usable life. I would not take it on long road trip with this battery. However, because this car is now used strictly as a local runabout, I'm letting it stay put but keeping a close eye on it. I'll likely swap it out later this year. Last time I installed a good aftermarket AGM in our old '09 Genesis sedan, it lasted 8+ years. So, realistically, this will be the last time I'll need to renew the battery in this '19, so really no sense waiting till the last minute and putting a strain on the alternator with a weak batt.