Cold start stalling

[Citizen]

My car has the stock battery, is now 7000 miles and 18 months old, and it's never failed to start & run as it should.

Same me, stock 23 months old battery, 20k km on it , and some 2-3 weeks car parked and never failed start

 

[somer82]

I have an OZ car and was having the stuttery cold start issues. At the time using BP 98 fixed the issue, except BP 98 from one (smaller) outlet which seemed to bring the issue back. Each time I filled I made sure I was nearly empty to check which fuels helped and which didn't.

The issue completely went away after a software update early 2024 (I can use any brand 98 fuel now). Although, another issue came about immediately after the early 2024 update - not cold starting at all! You'd have to open & close the door, lock, unlock, then try and it worked after that. Was quite annoying. Then another software update and that issue seemed to disappear as well.

Thankfully no issues with starting since. For me at least some of it was software and some fuel sensitivity related. I gather people who are having the issue now are fully up-to-date software-wise.

 

[Jinba ittai]

I know this isn't something you should have to do, nor is it going to be popular to say this, but I replaced the factory battery with the 40ah Antigravity battery from GRP and I've never had a single issue starting the car. I've gone as long as a couple of weeks without starting it, and it started right up, and that was without ever putting it on a battery tender.

The Antigravity battery isn't cheap, but it will remove about 30 lbs of weight in the back which is a nice extra bonus. There's something about the factory batteries that just isn't up to snuff. I suspect it's similar to what happens with cell phone batteries, where even though they test good, and show they've charged to 100%, over time they steadily degrade and hold less and less of a charge amount. Showing it's charged to 100% only means it's charged to the maximum of the lesser amount of charge it can hold, which is not the full amount it originally could.

This is what I think is happening with the factory batteries that sat on pallets for who knows how long before being charged and installed in cars on the production line. Some of them are weak; some weaker than others. I'm gonna guess that if those of you having these starting issues try an Antigravity battery, your cars will suddenly start fine and continue to start fine.

I don’t think this is an unpopular opinion. I intend to replace my battery with the antigravity one as soon as I my battery goes or I have any issues. Should be more reliable and has a massive weight advantage. Sure it’s expensive, but the car wasn’t cheap.