I know people won't believe me

[BlackZeppelin]

I know people won't believe me, but today with continuous use, web surfing, YouTube, bluetooth headphones and WQHD display, I averaged 15 hrs screen on time. I know it sounds ridiculous. And I'll give you the numbers.

I started at 1:15 pm with 78% battery. And ran the phone non stop. I had YouTube running, sometimes in the foreground, sometimes in the background. I had bluetooth headphones continually on. Mobile data, wi-fi and location on.

I constantly switched between YouTube, Samsung internet browser and Chrome. At the time of posting this thread, it was 3:15 pm. So exactly 2 hrs elapsed. Battery was down to 65%.

Doing the math, that is a tad over 15 hrs continuous screen on time. And I experimented this time and set the display to WQHD.

I don't know how it's possible, but I've been getting these results regularly with continuous use.

 

[Laura Knotek]

Could you post a screenshot of your battery stats?

 

[s2kdriver80]

Extrapolating from 13% of battery usage isn't sufficient. To get a true feel of how long the battery lasts, you're going to need to start full and run it down. Voltage and current in the battery differ across the percentage ranges, so extrapolation from a small window of usage won't tell the whole story.

Plus, who knows how Samsung calibrates their battery meters; it could be similar to how car manufacturers would like people to think their car is sipping gas with the perception of slow drain during the first half of tank usage.

 

[I Can Be Your Hero]

Extrapolating battery life like that won't work. You can do something relatively easy on battery for an hour, get an hours screen time then extrapolate it out to 20 hours. It won't work like that.

It's best to just use the phone for a whole day. Wifi, 5G, calls, text, Google maps etc and you'll see your battery go down. There's no way you'll get 15 hours screen time.

 

[BlackZeppelin]

I don't know how these battery stats work, like it doesn't really say what the actual screen on time average is. But here it is anyway. I know I seem ignorant but I don't really know how to read these graphs, to me it's not a clear indicator of battery performance. Because for each day, it seems to sum up total use and you don't know how many times you've charged the phone during that use. That's why I've done these calculations manually and always get the same result.

So I've used the phone about 20% and then calculated the screen on time. It's always the same, well over 13 hrs screen on time with continuous use. As I said before, it's different with standby and intermittent use.

 

[Linda McDonald]

Congrats! Works for me

 

[BlackZeppelin]

Extrapolating battery life like that won't work. You can do something relatively easy on battery for an hour, get an hours screen time then extrapolate it out to 20 hours. It won't work like that.

It's best to just use the phone for a whole day. Wifi, 5G, calls, text, Google maps etc and you'll see your battery go down. There's no way you'll get 15 hours screen time.

But I haven't done anything easy everytime I've manually calculated these results. As I said for today with 2 hrs use, it was continuous, YouTube running constantly, switching between internet browsers, gallery and YouTube, having wi-fi, mobile data, location on, bluetooth headphones running and WQHD screen resolution. Hardly a light use.

And also as I said before, I acknowledge there's a significant difference when using intermittently during the day when the phone is in standby, being periodically woken up. These results I've stated are for continuous use only.

 

[BlackZeppelin]

Just another run later this evening. Exactly 95 mins of continuous non stop use with WQHD resolution and bluetooth headphones on, location on, 10% battery drain. That's a tad under 16 hrs screen on time.

When I first got my phone I did an old fashioned conditioning. Without the phone being powered on, I charged the phone with the lowest charger I had, (10W) up to full. And left the phone at 100% for a little while. I then unplugged the charger and turned the phone on and reconnected the charger until it registered 100% full, (which was instantaneous). I unplugged the charger again and was done.

 

[donm527]

I really don’t think you can come up with an accurate screen on time just from calculating the time for 10% drain at the top and multiply. I always felt battery drain rate seems slowest from full charge…. Doesn’t the subsequent 10% seem to go faster than first 10%?? Or is it battery anxiety after the first 10 or 25, etc?

regardless of how I feel, I believe there is more involved to it and believe that battery drain rate is not constant nor linear as it gets to zero. I’m not an electrical engineer but maybe someone can verify the below explanation I found…

Why do smartphone batteries drain faster when at lower percentage?

J. Scott Elder, Analog and Mixed Signal Circuit Design Engineer at Nk Linear

A smartphone takes the same amount of Power to operate regardless the battery Voltage. This is the key. So bear with me for a moment of simple algebra.
[1] Power = Voltage x Current. [basic electronics equation]
[2] Current = Battery charge drained per unit time.
So rewriting [1] yields Current = Power/Voltage.
If Power is constant and Voltage decreases, Current must go up to keep the equation valid.
When current goes up, the battery charge is drained faster per unit time, hence the battery charge (read: percent) drops faster. That is the answer in words.
Perhaps numbers make this easier to understand.
Say a smartphone takes 2W to watch YouTube over WiFi. So Power = 2W regardless of the battery percentage or time you watch.
The average voltage of a battery is 3.8V. So the average current drawn from the battery while watching YouTube is 2W/3.8V = 0.526 Amps.
A Galaxy S9 has a 3 Amp Hour battery. So you could watch YouTube for:
3 Amp Hours / 0.526 Amp = 5.7 hours.
But as I wrote earlier, the battery voltage is not constantly 3.8V. As those Galaxy 3 Amp Hours are used up (100% goes to 0%), the battery voltage drops. Current then increases from 0.526A. So Amp Hours consumed over the second hour are higher than they were over the first hour. So battery state of charge (the %) drops faster.
I hope this helps.

https://www.quora.com/Why-don-t-sma...ometimes-it-stops-at-a-percentage-for-a-while

 

[fuzzylumpkin]

"people won't believe this thing that didn't happen"

You're not wrong lol. Post a screenshot of the battery usage screen (since last full charge) showing 15 hours screen on time with no charging and we'll talk.

 

[donebrasko]

What you are saying and doing doesn't mean anything. How old are you?

If you think you can get that screen time then why don't you just let it run for 15 hours non stop?

That's the only way you can say that you get that kind of screen on time.....

That's the ONLY way....

 

[evohicks]

Of course it's possible, here's my proof

https://flic.kr/p/2n9ABrh https://www.flickr.com/photos/36378108@N06/

 

[BerryBubbles]

Of course it's possible, here's my proof

https://flic.kr/p/2n9ABrh https://www.flickr.com/photos/36378108@N06/

Nicely Done...

 

[donebrasko]

Of course it's possible, here's my proof

https://flic.kr/p/2n9ABrh https://www.flickr.com/photos/36378108@N06/

What settings did you use?

 

[fuzzylumpkin]

What settings did you use?

You Mean what settings in Photoshop? Lol

 

[evohicks]

You Mean what settings in Photoshop? Lol

Lol yeah had to be done

 

[nuangel2]

I have no battery issues I use my phone all day. When I am n in car I charge wirelessly and other wise only charge when at 35%
I am satisfied.