I think Lexus OEM battery is around 580 CCA. that's like bottom shelf material at any store.

Most dealers are like that , it's bare minimum specs on their "dealer brand" battery. Take the free one while you can within warranty but as soon as they want to charge or even prorate you for a new one just get an aftermarket.

I found a place near me selling those noname batteries with great specs and reviews, I n business since the 60s. I'll never buy a battery anywhere else.

 

Agree with using the factory one if you're getting it for free - if you're in the market to get a new aftermarket one, I'd still suggest Optima or any gel-based battery. In my Corolla, I still have an Optima Redtop I bought back in 2007 and it's still going strong.

 

This isn't the first time that has happened to me with the Lexus factory battery. It was free and I could have gotten another new one from them for free but passed on that and just bought one. I just didn't want another battery that will likely die all at once without warning....again....even if it is free.

That was my third Lexus battery. The first one did the same exact thing with 7K miles on the car.

 

Did you use some kind of 12V plug in device? Sometime they drain battery to dead without you knowing. Like Dashcam or something

 

pretty sure he resolved the issue about a year ago. not a bad idea worth asking, however, for someone else who is having this same problem and comes across this thread in the future...

 

I let our three cars run for 10 minutes today as we're not driving them much at all, to keep the batteries alive.
I did the two in our driveway first, then the one on the street, so no one could take a joyride.

 

Signed up on the forums just to say thanks to everyone for sharing their knowledge on this thread.

My 2016 ES300h was showing symptoms such as the steering wheel and driver's seat getting stuck when getting into the car, and the car not getting into "Ready" to drive state. The battery gave reading of 11.6V down to 10.4V on different occasions. After reading this thread I went to the dealer confident of the problem and that it should be covered under warranty. They diagnosed the 12V aux battery to have a bad/shorted cell, so now the car has a new a battery and I'm happy that it was covered under the 4-yr/50K warranty.

 

I've heard great things about the Optima, but after a quick search just now people are saying the build quality became quite poor starting about 3 years ago. Instead of getting up to 15 years out of one, people are claiming 3 years as the max.

My OEM one is still working after 5 years, but it did die on me recently and was resurrected with a top up of distilled water. I feel like it may not last too much longer, but who knows?