Help S6--Battery failure

[DWFII]

I have a Samsung Galaxy S6. Today i noticed a crack between my casing and my screen and my back panel. Classic battery failure--swelling-- I'm told.

My question is: I read here sometime ago that it was better to keep your battery charged above 60%- 70% than to let it run down to 40%-20%. So I have kept it plugged it most of the time for better part of the last several (3?) years.

The outfit that is currently replacing the battery told me that charging the battery or having it on a charger for long periods of time, could damage the battery in just this fashion--making it swell up and eventually overheat and even explode.

So what's the truth...one or the other? or somewhere in-between?

And what is reasonable?

 

[Steven58]

Welp, an S6 is an old phone and batteries don't last forever. The rest? I dunno.

 

[ocnbrze]

Yep batteries don't live forever. For me I just don't let my battery stay below 0...... that's where you get into trouble.

But I think no matter what you do, batteries tend to live about 3-4 years, before they go out.

 

[Fox Mulder]

The shop is right, keeping it on charge all the time is not good for the battery and will cause it to fail sooner due to the heating.
Avoid full or nearly full discharge but don't be afraid to use the battery. Keep a backup external battery in your pocket if it makes you feel better but don't use it unless it's really necessary.

 

[svim]

https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
The swelling is a definite indicator your battery is starting to fail so while there is a chance it might 'explode' that's more of a possibility than a probability. Odds are the seals that retain the chemical stew inside the battery itself will fail and the resulting ooze will start to corrode internal components in your S6. Or in other words, at least you're seeing a warning sign to a) back up all your save data and b) shop around for a replacement.