I also heard if a battery's voltage falls beyond 3.0V (some say 2.5V), its time to chuck it...the internals has broken down to much. Even the salesman where I bought it said the same..he said he throws his
batteries at 3.0V.
Again i thought this tester will test that for me.
Now thinking about that...what does that really mean?
I mean our
mods shuts down way before that voltage. How does a battery even get to that low voltage?
The battery tester you bought will give you the battery voltage at X point in time (examples: 3.2V, 3.7V, 4.2V). It will give you what I would call a very basic IR reading similar to what a decent battery charger would give you.
From my understanding (take it with a grain of salt) if you measure the IR when a battery is fully charged (4.2V) you will get one IR reading. If you pull the battery from your charger at half charge you'll get a different IR. Test the battery when it's at 3.2V and you will get a completely different reading. From my understanding that is normal.
Regulated mods internal electronics have a low battery cutoff programmed into the board. Each manufacturer sets their cutoff differently. A DNA mod lets you set the battery cutoff via Escribe.
How can a battery get to 2.5V? An extreme example would be vaping a mech mod to well below what we would call a weak hit thus damaging the battery or worse. Although I doubt that anyone would get any kind of worthwhile hit below 3.5V. But we know there are dumb azz people out there.
Below was taken from:
Is draining a Li-Ion to 2.5v harmful to the battery?
Lithium batteries undergo unwanted chemical reactions when discharged below 3V causing their internal resistance to be permanently and significantly raised. Their capacity will suffer as well, meaning that they won't accept the same amount of charge anymore. When such an over-discharged cell is "brought back to life", it will likely become chemically unstable, creating a risk of a short circuit developing inside the cell.
Even worse, assuming that you measured 2.5V at no load, your batteries have dropped even lower when they were being discharged and have subsequently rebounded to 2.5V after the load was removed.
The minimum discharge voltage varies between various sites, datasheets, etc. but 3.0V - 2.7V is an empirical value. If discharged under this voltage the battery may be permanently damaged.
To get the precise value of min discharge voltage, consult the datasheet of your batteries.
