CR2032 Battery Chemical Composition and Corrosive Leak Risk Over Time

What is the chemical composition of the CR2032 battery?

Is it an oxidative corrosive chemical composition for metals and PCBs?

over the years and storage battery this chemical composition of CR2032 changes and turns into a corrosive oxidative chemical compound that leaks and corrodes?

In my 40+ years of dealing with electronic equipment I have never seen a CR20xx battery do any more than get a slight oxide film on it, even when left discharged for a few years. They are lithium based but very stable.

Google "2032 battery leakage" and you will get numerous posts on the subject.

One of them had:

The datasheet for an Energizer CR2032 says "Lithium / Manganese Dioxide (Li/MnO2)".
"They are guaranteed not to leak or they will replace your device".
They have a "Do Not Eat It" warning.
8 years storage life.

They have very bad effects if swallowed, the digestive juices can corrode them and cause leaks, which is why they have such strong warnings to keep them away from children. But in normal use, no.

The same thread had this also:

There two qualities of batteries:
1) Good ones made by name Brand companies in Europe or North America.
2) Cheap ones made by no-name-brand companies in China.
Guess which ones leak.

I suppose I have only ever seen name brand ones then...

Read this blog hope you will gain a clear idea about the CR2032 batteries.Link:https://www.microbattery.com/blog/post/battery-bios:-everything-you-need-to-know-about-the-cr2032-battery/

The CR2032 battery is a Lithium-manganese dioxide battery (LiMn02). It is composed of a Mn02 cathode and a lithium anode.

For the question with metal and PCB, I'm a bit confused.

No, unlike alkaline batteries which can suffer leakage, lithium cells don't. The cell will self-discharge over about 10 years, though. So, even if you don't use it, it will eventually be dead.

Hi
When this battery model is discharged to 60%, I can recharge it with a very small current. I can use it for 3 or 4 more times, then I throw it away.
Giovanni
Cheers

Specifically, the CR2032 battery is a Lithium-manganese dioxide battery (LiMn02). It is composed of a Mn02 cathode and a lithium anode. The device is specified for a 225 milliamp hours (mAh) and typically operates over a temperature range of –20 ºC to +70 ºC.