Dead 12v battery again

This is somwthing worth investing in....I think, I have one on order and will do some testing on it.
It is called the Faraday Box or Pouch and is said to isolate Car keys.

All Mazdas like everyother car use a similar system today and for people that like Proximity Keys then there is only one real way of it working and that is the key fox being active and communicating with car all the time, hence the battery will drain in Key Fob, and please none of this my old car never had an issue well your old car never had proximity key or the sercurity systems of cars made from 2019 onwards.

Key Fobs will go to sleep if around 4 metres away from car or you put in an isolation box at home like a Faraday Box or Pouch.
Put Faraday Box in eBay or Amazon search engine and you will see range, its not that expensive and perhaps worth a try, around $30 USD.

Yeah not saying doors are not closed, however I have seen it when you think Suicide Doors are shut and look closed but are not.

In passing I am helping a person in USA who has the MTM made Mazda CX-50 and complaining about key fob Batteries going flat within 12 months (always a reason why). The person is complaining that the car is defective wah wah wah, my old Chevy of 2018 did not go flat wah wah.

After I explained that the Fob and Car are always communicating and the Fob wont go to sleep if under 4 metres from car, then the usual wah wah, the car is defective. Then owner comes back to say the parked CX-50 is close to where he/she/them leaves the keys/fob. Then the reply is the car is a bad design, I said no people want proximity keys/Fob so how else do manufacturers design this, they would soon complain if it was harder to enter locked car.

On the 12V Battery issue, I just checked with 2023 MX-30 and it has the exact same Battery that has not changed and in fact is also used in the New MX-30 EV-R with Rotary Engine, same part numbers and brand YUASA.

Personally, I have always used Panasonic (another Mazda supplier of Batteries) or what comes with cars, My RX-8 went over 13 Years of age before it had to be replaced and my MX-5 12 years, and they still hold charge OK but don't have the cranking AMPS which is critical to start car. The secret is always make certain that the cells have plenty of distilled water to correct level (particularly the cells close to hot engine).

Anyway, appears some of you are still having 12V battery dying YUASA, I believe for these to fail it is something other than the Battery condition itself and why they are basically been overcharging by alternator or computer processor that controls supply to 12V battery.

I will keep an eye out and see what comes from Mazda, I just hope your Mazda Dealers ARE Updating ECU/PCM/BCM etc with MDARS even if Customer is not complaining of any issues. As you guys know I frequent many Mazda forums and the number of Mazda Dealerships who are basically frightened by anything new or computerised astounds me.
Yes Mazda does training but I dont know what percentage of Dealerships attend these sessions.