Stupid Question/Theory

[Altruist]

If i buy a phone. that is shipped with batteries charged at certain percentage like 70, and i don't fully charge it before turning it on the first time.

If i start my phone for the "first time" ( their tested at the factory, then reset) without full charging it, the percentage it was shipped with it the % i'm always stuck with.

This is just a though, educate me please :D.

 

[Canada EH]

9 minutes ago, Altruist said:

If a company on includes batteries charged at certain percentage like 70.

If i start my phone for the "first time" ( their tested at the factory, then reset) without full charging it, the percentage it was shipped with it the % i'm always stuck with.

This is just a though, educate me please :D.

 

Storage battery voltage prolongs the life of the product when its sitting on the shelf for months or even years. The battery slowly discharges due to the power the bms uses. Major corporations put millions into the safety factor so their reputation is not harmed. But they only do the minimum amount to pass UL tests. The CE marking is nothing, Chinesium Export, meaningless. The other ETL is just a taxation for the Chinese government for quicker shipping, exporting product out of China. Which is absolutely meaningless to safety. Of course the other markings could be ISO, which is a meaningful certification to have, just like the UL label. But remember, the Chinese culture, down to its core is fraud. So they could easily mark UL and ISO with #'s on it and it still be a counterfeit, whether a good one or a bad one.

 

If you buy some generic Chinesium product, there is no safety concern at all. All they care about is getting your money.

 

There used to be a problem with "Battery Memory" but with the somewhat new Lithium chemistries, those days are no long. The problems are balancing the battery pack, dont want a 2S pack to get out of wach, thats what the bms is for.

 

Charge it too low, the battery will drain slowly until the damage point of V(min) and below.

Dont want to leave at full charge either for long periods of time because it could degrade the battery.

 

I will wager a bet that the internals of the product, and the bms would probably charge the battery to 80-90% full, yet your battery bar on your product would read 100%.

 

 

 

[Enderman]

No.

The % is determined by the battery voltage, and what they shipped it with does not matter.

A factory reset does not change the battery percentage reading.

[Altruist]

1 minute ago, Enderman said:

No.

The % is determined by the battery voltage, and what they shipped it with does not matter.

A factory reset does not change the battery percentage reading.

What do you mean voltage on a battery?

 

2 minutes ago, Canada EH said:

Storage battery voltage prolongs the life of the product when its sitting on the shelf for months on end, or years on end.

 

[Turretgaming]

1 minute ago, Altruist said:

What do you mean voltage on a battery?

 

 

bruh

[Altruist]

Just now, Turretgaming said:

bruh

[Enderman]

2 minutes ago, Altruist said:

What do you mean voltage on a battery?

 

 

Do you not know what voltage is...?

[Altruist]

1 minute ago, Enderman said:

Do you not know what voltage is...?

i do but whats the voltage on the battery?

voltage changes depending on percentage?

why 0.o

i thought voltage doesn't fluctuate on purpose.

 

[Mira Yurizaki]

Battery percentage in a system worth its salt would use current counting over battery voltage. Battery voltage is a terrible way to measure how much life is left in a battery because you have to apply a decent load to the battery. If you don't, even a nearly dead battery can show it has much voltage as a battery with good charge. And the voltage even with a load applied may be quite flat over the course of its discharge.

 

I recall having to make a simple battery meter for a device. Because of the above, I had to measure it while the device was in use. On top of that, it would say it had 2/3 bars for basically most of the life span of the battery (I would chalk this up to the ADC not being precise enough, but I forget, it was a long time ago), which to me isn't very useful.

[Enderman]

1 minute ago, Altruist said:

i do but whats the voltage on the battery?

voltage changes depending on percentage?

why 0.o

i thought voltage doesn't fluctuate on purpose.

 

Battery voltage changes as the battery discharges.

This is how a device can know what % the capacity is at.

Please do some research and watch some youtube videos on how batteries work.

[Canada EH]

Voltage varies depending on chemistry of the battery. LiPo is different then LiMn for example.

When you use the battery, the voltage decreases and will do so until the bms cuts off the juice to save itself.

The amount of discharge also affects the capacity of the battery, but in good companies and their products, you do not need to worry about that.

 

There are different ways to measure the battery, then put that into a % that you see on the screen.

Also when the battery is being used the voltage will drop, because it drops under load, but it jumps back up when not under load. For laptops and cell phones no need to worry, there is not much load on the batteries. Basically the Battery Management System or BMS controls everything. It is just a Printed Circuit Board. Power Tool batteries have PCB's inside their battery plastic housing. Power Tool batteries have high discharge cells in there, like a Samsung 18650 25R which I believe is LiMn chemistry, Lithium Maganese, which is safe, if there is such a term. LiFePO4 is safe, then I'd say LiMn then there is LiPo

[Mira Yurizaki]

Also on the thing about using voltage as a battery life indicator, I believe the voltage of the battery varies not just how life left but workload given. So if you give a battery a 1K ohm load, it'll drop to a lower voltage than if you gave it a 15K ohm load, regardless of how much life is left.