Thanks for your replies, guys. Anyway I replaced mine because I noticed it takes a little more effort to start after parking 2 days. It appears our i-stop failure can be used as early warning indicator of used battery life. No excuse to be caught with a dead battery any more.

Thanks for the link. Good info. So 12.2V it is.. need to check my battery ASAP!
Btw voltage check can be done at any workshop right?

2 months is quite safe; 3 months, you're pushing your luck; 4 months is just damn lucky. Just get it changed la for peace of mind...

If you want an "adventure", refer mine where i pushed the battery to the limit to prepare yourself :
https://forum.lowyat.net/index.php?showtopi...post&p=86109015

Just look around mudah.my website and type in q85 in the search column.

Try to get quote from Mazda SC as well as I was told their Delkor 115D23L is selling at RM 474 including installation.  You don't have worry about warranty issue if you get it from SC.

VARTA 95D23L Q85 EFB - RM430 with delivery and installation.
Contact: Jason Teo 016-2128952

Very professional. He will reset the i-stop and power window latching after installation. Some shops may not have the software to do it. Usually the driver power window will not wind down with 1 touch after battery change so it has to be corrected.

latest with the largest capacity :
https://www.lelong.com.my/varta-q85-efb-sta...8-06-Sale-P.htm

latest with the largest capacity :
https://www.lelong.com.my/varta-q85-efb-sta...8-06-Sale-P.htm

Any issues with the current M3 suspension like ppl faced in M2? Kruk Kruk sound when turning and also when go on bump.. Looking at M3 but a bit worried that this suspension problem happens

If you ask SC, sure they will say it will void warranty if anything happen related electrical/electronics parts.  Just like they will void engine warranty if you miss the routine service schedule or use engine oil not supply by SC.

Changing to new battery, you just need to (if you replace car battery outside SC)
1.  Reset the power windows up/down positions. -- Long press the main power window button down until you hear a click sound at the lowest position and follow by lifting the power window button to up the window glass until you hear another click at the higheat position.
2.  Re-calibrate power steering lock to lock position (for hi spec only due to AFS（Adaptive Front-lighting System）-- Step 2 of the procedure below
3.  iStop - Some say no need as it will re-learn itself.  However, procedure is available below if you wish to do it yourself instead of letting the car auto learning it.

https://euroesi.mazda.co.jp/esicont/eu_eng/...464276460369055

Ignore the second portion of the setting up procedure related to sub-battery as they are for "i-eloop" function for Mazda 3 CBU.  CKD only use one battery (Main battery of the procedure above) for our case.