Rubbish.
This is not Genting or some cold winter country weather.
Even Genting goes right down to 20C still the car can start.

Whether you park at basement or I park in my car porch, ambient temperature doesn't affect vastly.
Its only if your car has parasitic battery drain, then it's an issue. Just like Roman Catholic also mentioned earlier.
Parasitic drain is when an accessory in your car drains excessively even when the ignition is off.

All you need is a clamp volt meter and some technique to check for that

Gawd, is this how Bateriku techs scam their way to non knowledgeable customers , in selling their batteries

Just wondering, if I never had problems with my battery before, and now it's drained, and I never changed any electrical components of the car (no amplifier, no aftermarket led, etc), is parasitic drain still a likely cause that I need to consider?

Yes, especially if it is a verified good new battery. Unless one has checked carefully everything, then only can one eliminate parasitic drain as a probable cause.

It is good never to tamper with electricals irregardless whatever the accessory shop guy has to say.

It was a 3 year battery. I put in repair mode and then charged it overnight and it was about 80% full. Managed to start the car and drive it around, but next day died again. So i was wondering whether the battery has reached the end of its life or whether there is something draining it overnight.

I even unplugged my dashcam and never switched on cabin lights.

I guess the battery has sulfated up to the point of no return.

Oh it is a 3 year old battery, I was thinking about it but your writing sure didnt sound like it.

So far I have only come across 1 case of parasitic drain and it takes about a week to drain down the battery.

So yeah, without any battery test done for confirmation, I would guess that it is an old battery unable to hold its charge any longer. There is no point trying to salvage it or worse still, it is a battery with a bad cell(s). Never charge any battery with bad cell(s).

Yeah it was an old battery, sorry for not mentioning earlier. I sort of guessed it's about time to change it, but i try to salvage because it was an expensive battery that came with the car lol. Locally very hard to find and sold at ridiculous markup prices.

What car make and model is your vehicle ? AGM battery ?

Locally very hard to find ? Oh my that doesn't sound good. Let me know what car and model, hopefully I can find out what battery size is it that we are talking about here.

This post has been edited by Roman Catholic: Jul 16 2021, 02:02 PM

Bateriku i think Amaron? its green in color, sorry i did not pay much attention to it

Then it should be a warranty replacement. 😊

when the CS told me i was stunned also because i have never heard such poor excuse (1-2 days did not start).
then the tech tried to validate the CS's story.

now i m waiting for them to tell me if can warranty claim or user dmg..
lesson learn, no more bateriku.