Why does "Display" use so much power? - Vibrant General

My phone is off a lot of the time but it still uses up a lot of my power according to the battery use screen.
For example, right now my battery is at 45%, 9h 15m since unplugged. "Display" shows up at 48% of the power use. Time on is 58m. On my old Evo, Display was rarely on the top of the list. A day like today would have Cell Standby and Phone Idle at the top taking up over 50 - 60%.
Could it be the auto brightness setting that's sucking power? Anyone else getting these results?

I haven't had the time to try and figure out why, but yes, I am getting the same results on mine as well. Right now the battery is at 44% (9h 42m on), with the Display at 55% (1h 33m display on). Display has always been at the top of the list for me. The next three are Android OS 13% (1h), Cell Standby 13% (9h 42m), Phone Idle 8% (8h 14m)

Mine has been unplugged for about 1.5 hrs, and on for 35 minutes.
Voice Calls: 45%
Display: 33%
Cell Standby: 8%

I'm experiencing something similar. Gravis, are you on auto brightness? If not, what brightness level?

nick_karstedt said:
I'm experiencing something similar. Gravis, are you on auto brightness? If not, what brightness level?
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I use a power widget to scale my screen brightness as needed. I'm usually on the lowest setting since I'm mostly indoors but I had it on 100% all day yesterday since I was outside and it wasn't really draining my battery.

gravis86 said:
I use a power widget to scale my screen brightness as needed. I'm usually on the lowest setting since I'm mostly indoors but I had it on 100% all day yesterday since I was outside and it wasn't really draining my battery.
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I too keep mine on the lowest setting as well. It's plenty bright enough for me. Also, I wouldn't trust those readings...it could also be related to the whole false reading of the reception and battery status symbol. Perhaps software related. Nevertheless, the screen still uses 20% less power than traditional lcd's.
Try keeping it off auto brightness and see how it does...should notice an improvement.

iunlock said:
I too keep mine on the lowest setting as well. It's plenty bright enough for me. Also, I wouldn't trust those readings...it could also be related to the whole false reading of the reception and battery status symbol. Perhaps software related. Nevertheless, the screen still uses 20% less power than traditional lcd's.
Try keeping it off auto brightness and see how it does...should notice an improvement.
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Click to collapse
You mean 20% less then an average AMOLED? and then AMOLED is 30-40% over LCD

Guys... You WANT your screen to be the highest thing using battery. It doesn't mean that it is bad. It just means that the screen is taking MORE battery than other things. You need to take it for what it is. A comparison versus other items on the phone. Your screen using that much power is how it should be (think about your laptop... turn the screen down or off, battery goes right up). If your screen was at the bottom, it would mean that the actual PHONE was using a ton more power.

hah2110 said:
Guys... You WANT your screen to be the highest thing using battery. It doesn't mean that it is bad. It just means that the screen is taking MORE battery than other things. You need to take it for what it is. A comparison versus other items on the phone. Your screen using that much power is how it should be (think about your laptop... turn the screen down or off, battery goes right up). If your screen was at the bottom, it would mean that the actual PHONE was using a ton more power.
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Good point. I'd rather have the screen eating power than say, the GPS. But I guess as long as the phone gets you through the it doesn't really matter, does it?

Does turning off the "Powering saving mode" option under "Sound and display" seem to help or hurt the situation?

AVonGauss said:
Does turning off the "Powering saving mode" option under "Sound and display" seem to help or hurt the situation?
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Mine is off. I don't like the screen changing intensity/brightness without my permission

AVonGauss said:
Does turning off the "Powering saving mode" option under "Sound and display" seem to help or hurt the situation?
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Click to collapse
I shudder to think that a "power saving" mode would actually increase battery usage...

gTen said:
You mean 20% less then an average AMOLED? and then AMOLED is 30-40% over LCD
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Indeed.

Most of the GSM models have display at the top, while CDMA have standby and idle.
This is due to CDMA radios drawing a lot more power.

I too am experiencing the same thing... my battery life has been less than stellar, so I have taken it off auto-brightness and am using a black wallpaper to try and reduce the consumption. After being on for 4 hours, (I had to reboot several times this afternoon) my display has used 70%, the next down is cell stanby at 12% I was fully charged at 3:30 today - it is now 10 and I am down to 33% battery remaining, with moderate to minimal usage.
I guess a gorgeous display requires a lot of battery.....

Battery use has to add up to 100%, so something has to take a majority. 66% doesn't mean it took a huge part of your battery. Imagine this, you unplug your phone and then go on pandora for 15 minutes of the first 20 minutes unplugged. Say your battery was at 96ish by then. If you checked your battery usage and it said something like PANDORA: 75%, it means that pandora used 75% of the 4% that has been drained, not like pandora has some type of abnormal battery sucking bug in it (key word abnormal, i'm aware pandora wears on a battery). But get the gist? If it were "cell standby" and "phone idle" that were using the battery, then we'd have something to worry about seeing as the phone wouldn't even be in use during its times of most power consumption.

You people apparently never actually TALK on your phone. My voice calls take most of my power.

Pneumatic said:
You people apparently never actually TALK on your phone. My voice calls take most of my power.
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Click to collapse
for me, i've noticed that installing and moving files on the internal and sdcard memery eats up the battery the fastest.

hah2110 said:
Guys... You WANT your screen to be the highest thing using battery. It doesn't mean that it is bad. It just means that the screen is taking MORE battery than other things. You need to take it for what it is. A comparison versus other items on the phone. Your screen using that much power is how it should be (think about your laptop... turn the screen down or off, battery goes right up). If your screen was at the bottom, it would mean that the actual PHONE was using a ton more power.
Click to expand...
Click to collapse
hah2110 said:
Guys... You WANT your screen to be the highest thing using battery. It doesn't mean that it is bad. It just means that the screen is taking MORE battery than other things. You need to take it for what it is. A comparison versus other items on the phone. Your screen using that much power is how it should be (think about your laptop... turn the screen down or off, battery goes right up). If your screen was at the bottom, it would mean that the actual PHONE was using a ton more power.
Click to expand...
Click to collapse
hah2110 said:
Guys... You WANT your screen to be the highest thing using battery. It doesn't mean that it is bad. It just means that the screen is taking MORE battery than other things. You need to take it for what it is. A comparison versus other items on the phone. Your screen using that much power is how it should be (think about your laptop... turn the screen down or off, battery goes right up). If your screen was at the bottom, it would mean that the actual PHONE was using a ton more power.
Click to expand...
Click to collapse
hah2110 said:
Guys... You WANT your screen to be the highest thing using battery. It doesn't mean that it is bad. It just means that the screen is taking MORE battery than other things. You need to take it for what it is. A comparison versus other items on the phone. Your screen using that much power is how it should be (think about your laptop... turn the screen down or off, battery goes right up). If your screen was at the bottom, it would mean that the actual PHONE was using a ton more power.
Click to expand...
Click to collapse
I can't quote this enough for emphasis.
Use your brains folks. If your battery is lasting all day and your screen is using half of your power draw, then you simply have a far more efficient phone than before.
And over the EVO, that makes a TON of sense. Your WiMax OFDM radio probably used up a higher percentage of your total power draw because it simply uses more power than our WCDMA UMTS radio.
Be happy - not disappointed. It means your battery is mostly being used up only when you actually use the phone as opposed to eating up all of your battery while it's just sitting in your pocket.

reuthermonkey said:
I can't quote this enough for emphasis.
Use your brains folks. If your battery is lasting all day and your screen is using half of your power draw, then you simply have a far more efficient phone than before.
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Rather than wasting time with not so clever posts, maybe it would be more beneficial to read the first post a bit closer. If you're not using the device a lot, you would expect the Display usage indicator to decrease over time and the other indicators such as Cell standby and Phone idle to increase over that same time period.

Related

Display Issues

Ill make this plain and simple, im having really high display percentage on my N1 and i cant figure it out. As u can see the picture below, the display % is at a 81%!!! and here is the thing, i have only 4 widgets running. At the time that i took the pic i had the brightness at 30% but even if i have it at 0% display % will always be around 60-75%.
This is what i have on my N1:
Rom: cyanogen 506
Kernel: persiansown uv-oc
So this being said, this display problem is affecting my battery. i get an average of 12-16 hrs which its pretty good, i think but i used to get 32-36 hrs. Can anyone know what could be the problem? Cuz im totally stumped
do you keep your screen on for long periods of time?
blaboy51 said:
do you keep your screen on for long periods of time?
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Click to collapse
oh no, i turn it off when i dont use it. i have the screen timed out at 2min, 1 min, 30sec, ect.. and still get same results.
correct me if im wrong, but i think the battery status (usage) is staggered. Meaning itll post every thing that uses the battery and will display in percentages and will total to =/- 100%.
So if the rest of the phone is only using 19% then your screen would then display around 80%. Lets say the rest of the phone is using 50%, then your battery would then display around 50% of battery use. But its still using the same power consumption with the two instances.
again, correct me if im wrong, i briefly remember reading that somewhere. Cause i guess someone had been using the phone with 50% brightness and when he decided to put it at about 10% he actually increased 2% on his display usuage. hahaahha!
correct me if im wrong, but i think the battery status (usage) is staggered. Meaning itll post every thing that uses the battery and will display in percentages and will total to =/- 100%.
So if the rest of the phone is only using 19% then your screen would then display around 80%. Lets say the rest of the phone is using 50%, then your battery would then display around 50% of battery use. But its still using the same power consumption with the two instances.
again, correct me if im wrong, i briefly remember reading that somewhere. Cause i guess someone had been using the phone with 50% brightness and when he decided to put it at about 10% he actually increased 2% on his display usuage. hahaahha!
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I hear what ur saying, so theres no way around it.
Sent from my Nexus One using the XDA mobile application powered by Tapatalk
On Desire ROMs it's only 17%.. or sometimes lower. I don't really care though.. Lol.
It is all relative, always adding up to 100%. If you're phone/wifi/3g/cell percentage is really low, then the display will be really high. The higher the display is shows how good the rest of the system is at conserving power. The display is the largest battery drain on the system. If something else was higher, or even close to the display use after you've used the display for a while I'd be scared something was wrong.
Let's say you charge your phone, never turn on the display, and leave it sitting for 5 hours. Then check percentage. Cell idle, Android OS, and things like that will be the largest, totalling 100% battery use. But your battery may only be down 10%. Then use it for an hour with the display on, display will suddenly jump up to 80% and everything else down to 20%.
Or in other words. Let's say you have used 20% of the battery (battery level is down to 80%) On the battery usage screen display takes up 90% of that, and the rest of the system 10%. That means out of the 20% you used of the battery, 18% was used by the display, and 2% by everything else.
People think Cyanogenmod is bad because the display is so high compared to other mods, but it means that the rest of the system in cyanogenmod is actually more power efficient than the others. So display will naturally be higher relative to everything else.
I believe this is a known issue with 2.1
so i guess in a way its saving power,right? since it is not didtributing power all over the place.
i think its because of the Screen AMOLED is probably a battery eater, i think its fixed and its called Super AMOLED

Battery life?

Does having usb debugging on effect battery? I left it on today and noticed horrible battery life, phone was at 15 percent at three pm lol, minimul usage. I am running a over clocked undervolted kernel woud that have something to do with it?
stayin100 said:
Does having usb debugging on effect battery? I left it on today and noticed horrible battery life, phone was at 15 percent at three pm lol, minimul usage. I am running a over clocked undervolted kernel woud that have something to do with it?
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Click to collapse
I'd guess the overclocked kernel is your issue. Also, check your battery usage in settings and/or spare parts to see anything that stands out. If you have high cell standby usage or a high running time, that would also be a culprit.
I've been running OTB Test 5 1.3 for several weeks now and have great battery life, much better than stock. I would look in your battery usage to see whats using up all the battery like imnuts said. High cell standby drains battery really bad so if thats up there then I would start using airplane mode more often.
Its at three percent. Airplane mode is not an option, then I could miss important texts correct? And not be able to use internet right? Yes battery life is horrid right now. I tried using set cpu to lower cpu during screen off time an my phone just shuts off when the screen is off for any length of time. I do run my screen at 100% tho.. Might just try a different kernel
Swyped from my over-clocked Fascinate using XDA App
stayin100 said:
Its at three percent. Airplane mode is not an option, then I could miss important texts correct? And not be able to use internet right? Yes battery life is horrid right now. I tried using set cpu to lower cpu during screen off time an my phone just shuts off when the screen is off for any length of time. I do run my screen at 100% tho.. Might just try a different kernel
Swyped from my over-clocked Fascinate using XDA App
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Click to collapse
Profiles in SetCPU don't work on our phones. They cause it to freeze, like you're experiencing.
Sent from my Froyo Fascinate
imnuts said:
Profiles in SetCPU don't work on our phones. They cause it to freeze, like you're experiencing.
Sent from my Froyo Fascinate
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You da man! Seen some people mentioning it and tried installing it, cool in theory, if it worked that is.
stayin100 said:
I do run my screen at 100% tho..
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Click to collapse
Is there a reason you need to run at 100% all the time? That's probably your biggest battery drain.
At least try setting to auto.
Sent from my SCH-I500 using XDA App
Alright I did *22899, charged to 100%, turned off and charged again till 100%. Booted then booted into CWR, proceeded to wipe batt stats, Dalv Cache, and Cache Partition. That was at about 1am, went to bed and woke up at 9:30, phone off charger all night and it was at 75%.
Cell standby 41% T/O 9H 50M time without 0%
Screen brightness is up because thats why I bought the phone, this screen is awesome. Battery life was never and issue before I rooted and started with the roms and kernels.
Best I expect with all the antennas on except bluetooth is 7-12% drain overnight. The number one battery killer is the sAMOLED display.
It is rich in contrast and pleasing to look at. The screen resolution is good but a tad grainy. They say the pixels are off when black, but a slight glow is always detectable in a completely dark room (boot up your phone in complete darkness, the black screen looks different on than off). It can also burn in, so I recommend hiding the status bar up top or at least switching to 24h time to prevent the M from burning in. back to topic, there is nothing magic about it for battery drain though. You can do alright if you always work in black background screens, but in many cases you are doing worse than an LCD. Don't expect more than 2.5 hours of active use in the best circumstance if you leave it at 100%.
Sources:
Resolution:
http://m.zdnet.com/blog/apple/shootout-iphone-4-retina-display-vs-galaxy-s-super-oled/8300
Power Usage:
http://phandroid.com/2010/12/16/exclusive-lg-b-android-phone-super-slim-super-bright/
(note GOS since this is propaganda, but the chart is interesting. It implies that our screens burn up to 1.13 watts when full white, which can be 50% or so higher than similar displays. It also contradicts my statement that black pixels are always on)
Apologies again for straying from topic. The display was the main factor that made me pick Samsung, and yes I do like it.
Swyped w/ XDA App. When in doubt, mumble.
51% at Noon after moderate use, did a nandroid back up and flashed a theme as well. Theme I flashed is pretty dark and high contrast, so I'm gonna tone down the screen to zero percent, charge it back to 100% and see what the rest of the day is like. Also have had GPS and Sync on at all times as well, going to try it without those for the rest of the day as well.
Do you guys use auto sync and background data? I don't think I really need them, I don't really care about my facebook push notifications, but do care about email...

Battery Display always at 45%.....

Whenever I check my battery status, my display is always at 45%. Is this normal? I still get good battery life, I think. For example, I been unplugged for 6h and 18m and I'm just at 70% battery remaining.
I don't know what to tell you; if you aren't doing a lot of CPU intensive tasks, the battery should bbe good for hours.
Sent from my Nexus One using XDA Premium App
plmiller0905 said:
Whenever I check my battery status, my display is always at 45%. Is this normal? I still get good battery life, I think. For example, I been unplugged for 6h and 18m and I'm just at 70% battery remaining.
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that's kinda strange, not cuz you are always stuck but because you are showing 45%. I thought the atrix only measures by 10s.
NguyenHuu said:
that's kinda strange, not cuz you are always stuck but because you are showing 45%. I thought the atrix only measures by 10s.
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Click to collapse
That is exactly what I was thinking. I've never seen anything but increments of 10%.
No....I'm not talking about my battery percentage, I'm talking about my display percentage. Its always the higher of the four...wifi, phone idle and cell standby is always low, like in the single digits low. But the display is always high. Like for example I woke up this morning, checked what was consuming battery and the display was at 65%. If the phone was sleep for the past 4-5 hours thus the display not being on, the display shouldn't be consuming that much battery, so I thought.
I still get great battery life. Im just wondering if anyone else display is also consuming a lot battery and what could be causing it.
A-A-A-Atrix!
plmiller0905 said:
No....I'm not talking about my battery percentage, I'm talking about my display percentage. Its always the higher of the four...wifi, phone idle and cell standby is always low, like in the single digits low. But the display is always high. Like for example I woke up this morning, checked what was consuming battery and the display was at 65%. If the phone was sleep for the past 4-5 hours thus the display not being on, the display shouldn't be consuming that much battery, so I thought.
I still get great battery life. Im just wondering if anyone else display is also consuming a lot battery and what could be causing it.
A-A-A-Atrix!
Click to expand...
Click to collapse
Ahhh, ok. I get what you mean now. This is normal for most Android phones with large (4" or bigger), bright screens. As long as you are getting good battery life you are fine. I'm assuming you keep your brightness set to automatic?
plmiller0905 said:
No....I'm not talking about my battery percentage, I'm talking about my display percentage. Its always the higher of the four...wifi, phone idle and cell standby is always low, like in the single digits low. But the display is always high. Like for example I woke up this morning, checked what was consuming battery and the display was at 65%. If the phone was sleep for the past 4-5 hours thus the display not being on, the display shouldn't be consuming that much battery, so I thought.
I still get great battery life. Im just wondering if anyone else display is also consuming a lot battery and what could be causing it.
A-A-A-Atrix!
Click to expand...
Click to collapse
Considering you are getting good battery life and your display has that high of a percentage after "sleeping" that long is a good thing. That just means the other processes are running efficiently. You should always expect the Display to take up at least 60% of your battery, especially after a full cycle. What really matters is actual runtime.
tekonus said:
Ahhh, ok. I get what you mean now. This is normal for most Android phones with large (4" or bigger), bright screens. As long as you are getting good battery life you are fine. I'm assuming you keep your brightness set to automatic?
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Click to collapse
Yup..brightness is set to automatic
live4nyy said:
Considering you are getting good battery life and your display has that high of a percentage after "sleeping" that long is a good thing. That just means the other processes are running efficiently. You should always expect the Display to take up at least 60% of your battery, especially after a full cycle. What really matters is actual runtime.
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Click to collapse
Ok...thanks. I was just wondering.

Screen battery drain

I'm curious if anyone else is having an insane battery drain just from Using the screen. this is my first Android device after switching from an iPhone so I'm not sure if it's normal but with auto brightness I still get 60-80 percent battery drain. I have a Us AT&T version of the S4.
Having a 5 inch 1080p screen will be the biggest battery drainer on the phone currently im getting 3-4 hour screen on time which imo is amazing
krump2buck said:
I'm curious if anyone else is having an insane battery drain just from Using the screen. this is my first Android device after switching from an iPhone so I'm not sure if it's normal but with auto brightness I still get 60-80 percent battery drain. I have a Us AT&T version of the S4.
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Click to collapse
If you're looking in the battery stats then yes, the screen always consumes the most battery out of everything.
Its when an app consumes more battery then your screen you've got some problems.
Its really not insane battery drain, its normal if your screen is on all the time. think of a laptop that s not plugged in it will go for days or hours sitting closed with the screen off but still on but with the screen on it draws a lot of power and your battery life soon goes down to 4 hours.
The percentage it is telling you is also misinterpreted. Its not telling you that 60%-80% of your battery is consumed by the screen
Basically if your battery is at 80% and its saying 80% of the battery is used by the screen its telling you that so far out of the 20% currently used of the battery 80% was by the screen and 2% by facebook and 6% by browser ect.
krump2buck said:
I'm curious if anyone else is having an insane battery drain just from Using the screen. this is my first Android device after switching from an iPhone so I'm not sure if it's normal but with auto brightness I still get 60-80 percent battery drain. I have a Us AT&T version of the S4.
Click to expand...
Click to collapse
Screens have always been the biggest drain on a mobile device (laptops included). If you want to minimize this (even though it is absolutely normal) you can try going to the Power Saver settings and enabling the "use low power Screen" or something along those lines. I've set that on mine, noticed a bit of a life increase, haven't seen any difference in the screen... so seems like a win-win situation.

[Q] Low power settings

Hey everyone,
I just got this phone and successfully rooted. I've been able to customize just about everything I'd like, but I ran into something today that I can't figure out. When the battery gets low (under 5%), the phone automatically dims the screen to the point where it's essentially unreadable. I looked for a way to disable this, but I can't find an option.
Power saving mode is disabled and I'm on Android 4.22 with the MF3 baseband.
Anyone know how I can disable this annoying feature?
Thanks
shingy said:
Hey everyone,
I just got this phone and successfully rooted. I've been able to customize just about everything I'd like, but I ran into something today that I can't figure out. When the battery gets low (under 5%), the phone automatically dims the screen to the point where it's essentially unreadable. I looked for a way to disable this, but I can't find an option.
Power saving mode is disabled and I'm on Android 4.22 with the MF3 baseband.
Anyone know how I can disable this annoying feature?
Thanks
Click to expand...
Click to collapse
If you are under 5%, it's a good bet your battery doesn't have enough juice left in it to keep the screen bright and keep the phone functional. Possibly, you might find a mod, but I don't see how it would do you or the phone any good. You can't squeeze any more juice out of it than what is left in it. Good luck.
Yea, I know it will drain the battery faster, but if I can't see what is on the screen anyways, it doesn't matter if it lasts longer.
shingy said:
Yea, I know it will drain the battery faster, but if I can't see what is on the screen anyways, it doesn't matter if it lasts longer.
Click to expand...
Click to collapse
You're not getting what I am saying. It's not that it will drain the battery faster, it's that there is no juice left in the battery to make the screen brighter and keep your phone running at the same time. It's not like a gas gauge on a car. When a battery gets low, it's ability to function at a necessary level is compromised. 5% doesn't mean you have 5% of completely powered battery left. 5% means you are down to 5% of the batteries total ability to function. In other words, your battery is operating without 95% of its peak performance. Granted, modern batteries have handled this in better ways, but when you get to 5%, you really are too low for performance. Thinking you can get 100% of the batteries performance for the last 5% charge showing until it hits 0% just isn't going to happen.
scott14719 said:
You're not getting what I am saying. It's not that it will drain the battery faster, it's that there is no juice left in the battery to make the screen brighter and keep your phone running at the same time. It's not like a gas gauge on a car. When a battery gets low, it's ability to function at a necessary level is compromised. 5% doesn't mean you have 5% of completely powered battery left. 5% means you are down to 5% of the batteries total ability to function. In other words, your battery is operating without 95% of its peak performance. Granted, modern batteries have handled this in better ways, but when you get to 5%, you really are too low for performance. Thinking you can get 100% of the batteries performance for the last 5% charge showing until it hits 0% just isn't going to happen.
Click to expand...
Click to collapse
Ok, that's a fair point. But, it's never been like that for any other smart phone I've had in the past - they have all performed at full operation until the battery is drained and it shuts off. So, this seems like more of a software option then an inability to run at full performance.
shingy said:
Ok, that's a fair point. But, it's never been like that for any other smart phone I've had in the past - they have all performed at full operation until the battery is drained and it shuts off. So, this seems like more of a software option then an inability to run at full performance.
Click to expand...
Click to collapse
More than likely a safeguard built into the firmware to keep from damaging the phone or battery. Like I said, it could probably be modded, it just isn't a good idea. The phone isn't made for it and the battery isn't made for it. But it certainly is (or should be) your choice if you want it to do so. Anyway, good luck and hopefully someone can point you in the direction you need.
Thanks Scott

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