Database Users

[Q] Tips to extend battery life? Anyone?

Hey guys,
Just got my Epic yesterday.. coming from the G1 with lots of experience loading and tweaking ROMs and dealing with same/similar battery issues.
After unpacking the Epic I used it and let it drain down to zero before recharging it; after a full recharge, I loaded up the 7 screens with widgets and ran a live wallpaper (fish). I didn't really use the phone much at all and the phone went from 100% battery down to zero in the span of only four hours!!! Geeze, you've got to be kidding me - four hours battery life?? WTF????!!
Back to the drawing board: I rooted it and ran SetCPU with some power saving profiles. Removed the live wallpaper and went to stock wallpaper. Set display power off at 30 seconds. Note that 4G remains off since there's no 4G in my area..
Couple of questions:
1. Is there any way to toggle 2G/3G like there was on my old G1? I know that was a power saver.
2. I didn't stop to read all the documentation yet (typical male, I know) but is there any way to wake this thing up from sleep mode besides pressing the power button? I can see that power button breaking for as much use as it's getting from me constantly having to wake this thing up!
3. My brightness setting is set to auto - since the display is usually the biggest drain on these things, is there a recommended manual brightness setting (percentage) that seems to work well for you and saves on battery power?
I'm waiting for the Seideo Extended Battery (just like many of you) and am wondering if I should keep the Epic since I'm on the Sprint 30-day Easy Return program.
Appreciate hearing from everyone!
Chris R.

I don't have 4G where I am. But, I have a all black wallpaper(uses less power) and unrooted. I easily get about 12-18hr out of my phone wit normal use(text, talk, and surfing the net with skyfire). Only thing that really kills my battery are games(Robo Defense can take over 30min to play one game).

Thanks for the reply - situation NOT improving
Thanks for the reply.. unfortunately, the situation is not improving...
I tried setting a Sleep Profile using SetCPU that would under-clock the CPU (using the stock kernel) once the screen dimmed and the phone went into Sleep Mode. Unfortunately, as mentioned in another thread here, the result was that the phone froze and required a battery-pull to reset.
I'm really starting to lose my enthusiasm for this device; as beautiful a display and as responsive a CPU/GPU, all of that doesn't mean much if you don't have good power management built into the firmware. At 6PM this evening I pulled it off the charger at 67% charged, it's now 8:35 PM, only 2.5 hours later and I'm down to 22%. I'm in a decent coverage area and get 2-4 bars of 3G strength so I don't think it's an issue of the radio being the culprit; in-fact if you check the battery stats it reports that that lovely Display is accountable for 78% of the battery usage! So I guess we're paying a hefty price for these 4-inch AMOLED displays!
I read somewhere else that the most recent update (DI07) has caused the battery performance to decrease; since my unit is brand-new it immediately went and installed DI07 shortly after the first boot-up so I have nothing to compare it to.. can anyone comment on that?
Thanks!
Chris R.

I'm sure custom ROMs will put performance / battery life on the top of the list but until then, I use JuiceDefender beta and have seen pretty good results with it. It shuts off data whenever the screen is off and since my screen is off a good amount (only use my phone if I need to check email, call, and / or text, which is rare when I'm at work). Other than that, yes, use black wallpaper, lower brightness to the min. in the OS and browser, and don't leave apps that constantly use 3G open (things like ebuddy, pandora, etc.). 3G really destroys battery life so minimal use of 3G data would maximize battery life. Maybe the devs can figure out a way to get at least one full day of battery life on this phone. I'm hoping that is the case.
As to your post, yes, DI07 has resulted in poorer battery life, for whatever reason. I was definitely getting a few hours more with the older firmware. I would not lose hope yet. As disappointed as you are (and all of us are, I can assure you of that), the devs are really starting to push out nice ROMs already, and in a few weeks to a month, I bet we will see some solid battery life. Hell, even 2.2 should yield much better results. Patience

Thanks for the tip!
nimaim said:
I'm sure custom ROMs will put performance / battery life on the top of the list but until then, I use JuiceDefender beta and have seen pretty good results with it. It shuts off data whenever the screen is off and since my screen is off a good amount (only use my phone if I need to check email, call, and / or text, which is rare when I'm at work).
Click to expand...
Click to collapse
Thanks for the reply! Also thanks for the tip regarding JuiceDefender! What a great app! will give it some more time and report results back here.
Thanks again!
Chris R.

nimaim said:
I'm sure custom ROMs will put performance / battery life on the top of the list but until then, I use JuiceDefender beta and have seen pretty good results with it. It shuts off data whenever the screen is off and since my screen is off a good amount (only use my phone if I need to check email, call, and / or text, which is rare when I'm at work). Other than that, yes, use black wallpaper, lower brightness to the min. in the OS and browser, and don't leave apps that constantly use 3G open (things like ebuddy, pandora, etc.). 3G really destroys battery life so minimal use of 3G data would maximize battery life. Maybe the devs can figure out a way to get at least one full day of battery life on this phone. I'm hoping that is the case.
As to your post, yes, DI07 has resulted in poorer battery life, for whatever reason. I was definitely getting a few hours more with the older firmware. I would not lose hope yet. As disappointed as you are (and all of us are, I can assure you of that), the devs are really starting to push out nice ROMs already, and in a few weeks to a month, I bet we will see some solid battery life. Hell, even 2.2 should yield much better results. Patience
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Click to collapse
DI07 has hurt my battery life substantially. In fact, my battery drains very close to twice as fast now with the update. I don't understand what they did. My phone certainly doesn't seem any faster, my display is dimmer, and battery life sucks. I'm going to have to go back to DG27 so I can use my phone all day. With DI07 it always dies on me by mid afternoon. With DG27 it was still running by 11pm at night without even a battery low warning.

juice defender ftw
also, use advanced task killer with low security settings to kill all the background processes. Set the autokill to when the screen turns off. This keeps everything pretty well managed and helps with battery as well

JUICE DEFENDER BATTERY!!! Saved my phone from flying out of my car window at 10 in the morning........

here is a link to a thread I started.
Sharing my juice defender settings. I also use ultimate juice.
http://forum.ppcgeeks.com/sprint-epic-4g/133933-sharing-my-juice-defender-settings.html
I can get a day and a half (or slightly longer) out of a single charge.
YMMV.
Hope this helps

Advanced task killer + Juice Defender. You could also get some custom roms and Kernals that would help boost it.
But that's your best hope. Keep off 4g, wifi, bluetooth, etc.

compujock said:
DI07 has hurt my battery life substantially. In fact, my battery drains very close to twice as fast now with the update. I don't understand what they did. My phone certainly doesn't seem any faster, my display is dimmer, and battery life sucks. I'm going to have to go back to DG27 so I can use my phone all day. With DI07 it always dies on me by mid afternoon. With DG27 it was still running by 11pm at night without even a battery low warning.
Click to expand...
Click to collapse
Look here- try stopping the DRM service and see if that helps your battery life with D107

jimmyz said:
Look here- try stopping the DRM service and see if that helps your battery life with D107
Click to expand...
Click to collapse
Ah, the evils of DRM can strike in unexpected ways...
I wasn't really having a battery problem but I just turned DRM off, so we'll see if battery life improves anyway.
I had a whole long post here that got wiped with the xda disk array failure, so I'll just sum that up here too:
1) Use wi-fi if possible - it REALLY helps
2) 4G does not seem to use the battery any more than 3G, although hunting for 4G does and 4G coverage is not as extensive as 3G even in 4G areas. So it's still best to leave it off if you're moving around.
3) Dim your screen and use a dark, static background. AMOLED screens don't work like LCD's; they use more power the more pixels are lit and the brighter they are.
4) GPS also kills your battery - leave that off unless you need it too.
I think that's it. I get about 18 hours on DI07 (even before trying the DRM thing; maybe I can get to a full day!).
One thing I'm noticing after checking DRM - I've got Google Maps' LocationService popping up about every 10 seconds, and I can't seem to shut it off permanently. (I went into Lattitude and turned that off, not sure what else to do.) That can't be helping... anyone know how to get rid of that?

I'm using juice defender and a constant email junkie, but lite use on other aspects of the phone. It goes off charger at 5:30 am and I'm about 67% at around 3p. It then goes in the car charger on the way home. This has much better battery life than the Pre or the Hero as with both I had to turn off email to get it to last throughout the day.
I don't expect these phones to last days, but I expect any phone that I get to last the business day. I've always been one to charge overnight.

Wifi drains battery more from what I've read.
Sent from my SPH-D700 using XDA App

I've heard the opposite that wifi (as long as it's connected) uses up less battery than 3g/4g. Any of them will suck the battery dry if they're searching, so make sure you have a connection to one of them.

Hi everyone, new to the forum. Just started checking it out when the Epic was released and this is my first post. Anyways, here's my question. My phone's been off the charger for 7 hours and 17 minutes and it is now down to 15%.
Display 79%
Cell standby 7%
Android System 4%
Phone idle 2%
Swype 2%
I've gone into the display settings and I thought I had set everything up optimally. The brightness is always very low. The screen timeout is 15 seconds and the keyboard matches that. I don't know what else I can do to cripple the phone to get the battery to last longer.
I have had wifi on, 4g off, bluetooth off, gps off. Really all I have done this afternoon while watching NFL games is check my yahoo fantasy score, play 2 games of WordFeud, and check twitter and facebook. I purchased Juice Defender a week ago and it has been running all day.
Any suggestions for how I can reduce the drain from the display? My background is a black and white picture of a friend of mine, which I thought would help.
Don't get me wrong, I love this phone. But the battery life I've seen is just terrible. I'd love to buy the extended battery from Seidio whenever its available, at least that would make it last longer even if the settings aren't tweaked.

Do you have juice defender installed?

Yep. Its installed and running now.
Sent from my SPH-D700 using XDA App

bagelicious said:
Hi everyone, new to the forum. Just started checking it out when the Epic was released and this is my first post. Anyways, here's my question. My phone's been off the charger for 7 hours and 17 minutes and it is now down to 15%.
Display 79%
Cell standby 7%
Android System 4%
Phone idle 2%
Swype 2%
I've gone into the display settings and I thought I had set everything up optimally. The brightness is always very low. The screen timeout is 15 seconds and the keyboard matches that. I don't know what else I can do to cripple the phone to get the battery to last longer.
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Click to collapse
There are only two reasons for your display to be using that much battery:
a) it's too bright, or
b) you're using it a lot.
If you're using the phone a lot, your battery's going to run out pretty quick and there's no way around that. If you're using it a "normal" amount, which to me means maybe an hour *total* per day of having the display on, then the other culprit is going to be your brightness. (Some would argue that's less than a normal amount, but think about it... you get a new phone, you're going to play with it for a week or two until you've seen all the cool stuff. But at some point you're going to start putting it away most of the time and just using it when someone calls you, you get a message/email or maybe to play a game or two while waiting for the train.)
Set your brightness *all* the way down, just as a test for a couple days. Make sure all the "power saving" features of the display are turned *off* (auto brightness, and whatever that "picture detection" feature's called, I can't remember). You just want the display as dim as possible all the time, just to see what happens. See what the battery usage says after a day or two of this.
My bet is that you'll see a drop, and then as you get into a more normal usage pattern it'll drop further still. You can raise the brightness a couple ticks then as you learn how to stretch your battery out.
Personally, my display is rarely over 15% or so of my usage. Today it's 29%, but it's a Sunday and I don't have anything better to do but play around on my phone.
btw, it's still the first day I've tried this but that DRM thing might be working. It's almost 9PM and I'm still on like 80% battery, and like I said I have been using the phone off and on throughout the day.

That has helped tremendously. I installed it pretty much when I got the phone and I'm able to last the whole work day with 67% left. (10 hour day)

Battery life MUCH worse than Z2

The Z3 is a nice device, I enjoy the screen, thinness and weight, but the latter two definitely come at the expense of battery life.
Of course the faster CPU also plays a part. I'm just getting 3 hours of on screen time with my usage out of it. On the Z2 I got 4 hours.
I don't even know what these people do who get an insane 10 hours of screen on time out of theirs. Probably different kind of use, but still...
Once again I need to look having an external battery with me.
Disappointed.

naujoks said:
The Z3 is a nice device, I enjoy the screen, thinness and weight, but the latter two definitely come at the expense of battery life.
Of course the faster CPU also plays a part. I'm just getting 3 hours of on screen time with my usage out of it. On the Z2 I got 4 hours.
I don't even know what these people do who get an insane 10 hours of screen on time out of theirs. Probably different kind of use, but still...
Once again I need to look having an external battery with me.
Disappointed.
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Post your battery stats page. Seems odd to me. I have 2.5 hours of on screen time with 10 hours on battery at 78% at the moment.

I noticed that too since I switch from Z2. Its difficult to see from the power management tool indicating how many screen time ect.. the battery life just don't seems to be better then z2, and results and very random.. sometimes better then z2, sometimes worst then z2. Perheps firmware upgrade will help..
Sent from my D6653 using XDA Free mobile app

I have rolled through 3 Z3s due to defects on my 4th, all had great battery life up to 8.5 hours SOT, lowest is about 5 hrs SOT, before calibration. Give it a few charging cycles, or do a full charge and full discharge then recharge and use. You should then be fine. If that does not work maybe you got some errant apps or lots of them continously syncing. Also go to backup and reset menu and disable data logging.

been averaging a day and a half with over 8 hrs SOT with mine. mix of wifi/lte

I don't know how you guys do it. I always get around 3 hours SOT, no matter what. I wish there was a way to check wakelocks without root.
Sent from my Nexus 7 using Tapatalk

I think it has something to do with the apps you use.
Facebook, facebook messenger, snapchat, swiftkey and Nova Launcher gave me from 4+ estimated days (in stamina mode) to 1 day and 1 hours.

If I don't play games, I get between 6 and 8 hours SOT at the moment.
Check that google play services aren't burning through battery.
Should never get 2 or 3 or even 4 hours SOT unless you're playing games.
I use screen brightness on about 80% as well.

I'll be posting my power usage screenshots soon.
Off to the top off my head, screen was about 50% of power (with automatic brightness, and the slider set on the 1st third), the most power hungry app took about 25%, with the rest taken up by various other processes and apps.
WiFi off.

Facebook used to be a battery killer, I don't use it, but check on that.

Z3 has an incredible battery life
there's something wrong in the op

For my baterry stay perfectly (often 20% for system 20% standby and 50% screen)

Even if it's Facebook that eats 25% of power that still wouldn't account for the overall bad battery life.

Nope mate, sorry - my battery life is out of this world. It's not the Z3, it's your device - get it tested, re-flashed or inspected if the problem persists.

abhinav.tella said:
Facebook used to be a battery killer, I don't use it, but check on that.
Click to expand...
Click to collapse
Remove facebook or use an app killer

raizdepi said:
Remove facebook or use an app killer
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Click to collapse
Oh no I already removed, I do not have any battery issues, I was just giving a tip to OP.

Right, so here are my power usage screen shots.
I don't think these can be called ok in any kind of scenario.
I would like to add that with my Z2 I didn't ever get up to the 6 or 7 hours other people were getting out of it, but with my kind of use I got 4 to 4.5 hours, which is considerably more than I'm getting right now.
I supposed it's kinda obvious, with a faster CPU and a smaller battery. What else could have happened. It just annoys me that Sony tries to tell us that battery life is BETTER than on the Z2. It is not.

Well, reviews uphold/confirm Sony's claims so its probably not the phone itself per say. I get 7-8.5 Hrs SOT easily. Disable autosync when un-needed and location services as well. Then see.

Just as everyone suspected, it's malwarebook causing abysmal battery life. Remove it and watch your phone get tons more battery.
Considering that you're one of the very few, if not only, getting poor battery.....I have no idea what else it could be. The phone get's better battery because of using the 801 SOC instead of the 800, which sips battery like fine wine, leading to the increase in life over the z2.

Malware.... Yeah, whatevs.
Fact remains that with the same usage as before my Z3 performs worse than my Z2, so there.

Who thinks S8 battery life sux? Pls put your hands up!

There is a thread of fellows showing off envious battery life. Let me start one with the opposite lol
I think my phone might be faulty lol....Hope you folks can shed some light on how to improve battery life...
Snapdragon variant
AOD on
Infinity wallpaper on
Wifi and bt scanning off
BT off
Keep screen off setting off
No SHealth
Location history off
ForceDoze installed
Wifi/4g 50:50. 4g signal is quite weak at work though.
Wiped cache partition once after an OTA update.
Reset all app preferences oncr so I can keep an eye out for the access granted.
Auto brightness on
NFC on
Edge lighting on
No FB app, only use the wrapper Swipe with 2 hr update interval
WhatsApp, WeChat, Twitter installed
Adblocker for Samsung internet installed
FHD+
Outlook with 3 email accounts with sync and push on
Google Feeds off
Noticed one strange thing. Proximity sensor gets used quite often when on mobile internet. When on wifi, barely gets used..

Apparently you will be getting 16 + hrs from one charge? Oh that's just an atrocity! Lol.

s4shield said:
Apparently you will be getting 16 + hrs from one charge? Oh that's just an atrocity! Lol.
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I have no idea as to how some folks can achieve close to a day's usage with 4-5 hrs SOT..
I don't even call myself a medium user? Just surfing the internet whilst listing to music (stored on the SD card) whilst communutig (2 hrs in total both ways). Checking emails, a bit of messaging, FB via Swipe, no game at all at this stage (I don't even dare to try lol), etc..

The S8 Battery Life sucks I have to charge it three times a day.

It's been terrible for my S8. I barely touch the thing and I can't get thru a work day. I don't install any social network apps as well since they smash battery.
Going to chat with Samsung about returning it.

Man you sound like me lol. I have this beautiful, powerful piece of technology, amazing screen and all that stuff; and yet, I find myself hesitant to even use my phone. Right now I'm on the bus, testing my battery with mobile data on. I know it won't last long. What did we do to deserve it?
Sent from my SM-G950U using Tapatalk

Sorry to hear some are having battery issues. I'm one of the ones getting all day usage, and then some. I don't know if the info on the video link below will help, but I did setup my phone like the video describes. YMMV
https://youtu.be/rF41hBoK1aM

Samsung recently quite often began to produce models with defects, to the end did not test everything. When negative reviews are typed more, they will release a nude model, with an improved battery and less energy consumption. But most likely there will be some shortcomings in it.

My AT&T S-835 S8+ got excellent battery life - better than my S7e configured exactly the same way. I got a UK Exynos yesterday so I'll be able to compare how the two perform against each other. Most battery issues aren't h/w but user induced by s/w. Conflicting apps, things like Bixby remappers, and using older apps can cause battery drain. So can freezing and disabling some of Samsung's apps because they're co-dependent.

I get 48 hours with 5 hours of on screen time on a single charge.
Of course, I took a few steps to achieve this instead of sticking with out of the box settings.
I turned off AOD
I turned the screen brightness down to just half way.
Greenify - works just as well without root
Use Samsung's built-in management of apps, and shut off some background apps
I did purchase BK Package Disabler, for $1.50 USD it was well worth the price of admission. I don't use things like facebook - I disabled facebook, and any other bloatware apps I don't need.
Under accounts I disabled some google syncing like google fit or google calendar - I don't use those so stopping that is just one less running process in the background.
As with anything else, YMMV, but for me, this was pretty much all that was needed without hamstringing my phone. The important things like Gmail, weather, messaging all work normally

st0nez0r said:
I get 48 hours with 5 hours of on screen time on a single charge.
Of course, I took a few steps to achieve this instead of sticking with out of the box settings.
I turned off AOD
I turned the screen brightness down to just half way.
Greenify - works just as well without root
Use Samsung's built-in management of apps, and shut off some background apps
I did purchase BK Package Disabler, for $1.50 USD it was well worth the price of admission. I don't use things like facebook - I disabled facebook, and any other bloatware apps I don't need.
Under accounts I disabled some google syncing like google fit or google calendar - I don't use those so stopping that is just one less running process in the background.
As with anything else, YMMV, but for me, this was pretty much all that was needed without hamstringing my phone. The important things like Gmail, weather, messaging all work normally
Click to expand...
Click to collapse
Would you mind sharing the list of apps that you disabled via BK Package Disabler? Is this app the same as the Package Disabler Pro?

I'm in the poor battery life camp but I know people who are getting great battery life.
I've just installed Greenify and i'm going to try that, my S7 edge just about managed the day and since moving to the S8 i'm changing it in the afternoon to last the night which is annoying

It's been pretty good for me. 4 Hours SOT and gets through to bedtime happily.

I got poor battery life at first too, but then I read in another thread that if you used Smart Switch during initial setup to automatically install apps, that could be the culprit. I did a factory reset and manually installed my apps the 2nd time around and BAM! Awesome battery life.

prodigyX said:
I got poor battery life at first too, but then I read in another thread that if you used Smart Switch during initial setup to automatically install apps, that could be the culprit. I did a factory reset and manually installed my apps the 2nd time around and BAM! Awesome battery life.
Click to expand...
Click to collapse
I used Smart Switch on my setup and don't have battery life issues, as I stated above, so I'm not sure if Smart Switch is the actual culprit. Like others, I think the root cause boils down to a personal mix of apps, app settings, and possibly bringing over old app settings via manual copying or via Smart switch. At this point, I think a number of us are just shooting in the dark as to the root cause.

Should start a poll which S8 version you have if you have poor battery life. Maybe there's a correlation?
For the record, I'm in the good camp: over 6 hours SOT, last charged about 30 hours ago, and sitting at 38%.

Batterylife on full brightness is on par with other phones such as the iPhone 7 Plus when used at 30-40% brightness. I'd say that the S8 has great battery life! It performs slightly better than my previous phone, the S7 Edge.
Both my S8 and S7 Edge are Exynos models. I attached screenshots of what I sometimes get for batterylife. It varies a lot depending on the severity of my snapchat addiction. I commute in total about 3-4 hours a day (~1 hour by bus, 2.5 hours by train). When I'm on the go or at work, I'm on 4G+. When I'm at home or at university I always use WiFi. While traveling daily from home to University and back, I always listen to Spotify (pre-downloaded, NOT STREAMED) and I read the entire journey (3-4 public transit trip) manga/webtoons (mainly white + colors) or I read PDF's/view powerpoints + social media.
On top of all that, I am a heavy snapchat user. On average, I'd say I use snapchat for about 30-60min a day. I get about 5-8H SOT on average over a full day on automatic brightness. AOD is turned off, the rest is UNTOUCHED. Bluetooth is on as I have it paired with my Huawei Watch. Location is at high precision (simply untouched setting). Nothing disabled either.
From my previous experience with the S7 Edge, when using a stock rom....disabling apps usually result in worse battery life hence I don't disable apps anymore. Also, I never close out used apps.
Keep in mind:
The mAh indication at the screen on time screenshot indicates how high the display brightness has been. Mine is well above 1600mAh at merely 8H sot. This indicates a relative high brightness used. If I were to use a lower brightness while the display remains at 1600mAh consumed, my phone would have been able to achieve many hours more SOT. Do keep in mind that lowering brightness does not improve battery-life much on OLED-equipped smartphones.

AT&Tsucks said:
The S8 Battery Life sucks I have to charge it three times a day.
Click to expand...
Click to collapse
Try limiting the use of VR porn to once a day. :laugh:

Btw, I am using the Snapdragon version I think? Cuz that is the only version available in Australia official?
Seems Exynos version performs better battery life wise?

tuk1maar said:
Batterylife on full brightness is on par with other phones such as the iPhone 7 Plus when used at 30-40% brightness. I'd say that the S8 has great battery life! It performs slightly better than my previous phone, the S7 Edge.
Both my S8 and S7 Edge are Exynos models. I attached screenshots of what I sometimes get for batterylife. It varies a lot depending on the severity of my snapchat addiction. I commute in total about 3-4 hours a day (~1 hour by bus, 2.5 hours by train). When I'm on the go or at work, I'm on 4G+. When I'm at home or at university I always use WiFi. While traveling daily from home to University and back, I always listen to Spotify (pre-downloaded, NOT STREAMED) and I read the entire journey (3-4 public transit trip) manga/webtoons (mainly white + colors) or I read PDF's/view powerpoints + social media.
On top of all that, I am a heavy snapchat user. On average, I'd say I use snapchat for about 30-60min a day. I get about 5-8H SOT on average over a full day on automatic brightness. AOD is turned off, the rest is UNTOUCHED. Bluetooth is on as I have it paired with my Huawei Watch. Location is at high precision (simply untouched setting). Nothing disabled either.
From my previous experience with the S7 Edge, when using a stock rom....disabling apps usually result in worse battery life hence I don't disable apps anymore. Also, I never close out used apps.
Keep in mind:
The mAh indication at the screen on time screenshot indicates how high the display brightness has been. Mine is well above 1600mAh at merely 8H sot. This indicates a relative high brightness used. If I were to use a lower brightness while the display remains at 1600mAh consumed, my phone would have been able to achieve many hours more SOT. Do keep in mind that lowering brightness does not improve battery-life much on OLED-equipped smartphones.
Click to expand...
Click to collapse
This just looks too good to be true

HOW I DO IT - 3 day Battery Life with 15 hours of Screen on time on my Moto Z Play

Intro -
Firstly, for people who have doubts and want proof, see attached pictures.
As you can see, I am able to use my phone fluidly for a full 3 days, while using a heavy browser and apps like WhatsApp and FB lite while clocking in an average of 5 hours of screen on time every day.
For people who already get this long of a battery life or get an even better battery life, I am all ears and it would not hurt you to check out what I did to boost my battery life, as it would only make your life better. :fingers-crossed:
What did I do?
1.) I used these apps as replacements for stock/popular apps
2.) I employed these techniques in a personal combination comfortable to me
Full disclosure (things critics would like to know):
My ROM was stock, but heavily personally modified by applying 1.) and 2.) in combination.
I don't charge my phone with the stock *Turbocharger* as it leads to overheating and less efficient charging, I instead use my old Nexus 4 charger.
My phone was never on a 4G/LTE *DATA* connection but Wi-Fi was ALWAYS on.
My phone didn't get any signal for almost 30% of the time because of the area I live in and FYI looking for a network actually drains more battery.
My screen's brightness level was at minimum *most* of the time.
I was never playing any hardcore games that would have drained battery life.
Note -
My phone used to switch off automatically sometimes because the area I am in is really cold, and according to research lower temperatures can cause your phone to shut down automatically/arbitrarily.
Also, any other errors you might see/assume in my results are accidental, as I enjoy 3 days of battery life on a regular basis.
Additionally, as you can see in my attached screenshots, 15 hours of screen on time (meaning 15 hours of actual phone usage) takes away 50% of my Moto Z Play's battery. The rest of my 50% battery is spent on *processing* (that is, all the other tasks and hardware) when my phone's screen is active (for 15 hours) and also when it's on standby (in doze mode for 2.4 days=57 hours (3days-15hours) (when my screen is off).
So you could say that my phone has a total standby time of 6+ (2*50%=2*3days) days on standby (if the screen is never activated) because processing required is negligible in standby/doze state.
P.S. You will forget to charge your phone if it has a battery life of 3 days LOL.

Screen on time

It's amazing how much we actually use our phones in a given day, especially when we watch "videos"! Rate this thread to express how many hours of screen-on time you can get on the Samsung Galaxy M51 before depleting the battery.
Then, drop a comment if you have anything to add!

Getting 17hrs of screen on time minimum on full charge for youtube 3hrs , clash of clans 2hrs and 45-50 mins of calls per day....last 3 days with my usage
Plus Whatsapp of 1 hrs approx per day

gandeepan said:
Getting 17hrs of screen on time minimum on full charge for youtube 3hrs , clash of clans 2hrs and 45-50 mins of calls per day....last 3 days with my usage
Plus Whatsapp of 1 hrs approx per day
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SS or it didn't happen

I've had this phone 2 days and so far I've had 6 hours 31 minutes of screen time and I have 58 percent battery left. This is mostly YouTube, Web browsing, an hour of downloading apps from play store and a bit of emulation (ppsspp) am extremely impressed with the battery life on this phone.

Battery lasts more than 2 days at Medium Power Saving mode with moderate apps usage(no gaming but with youtube, magic fluid live wallpaper, whatsapp, browsing) and SOT approx 13+ hours in these two days. At the end of second day battery remains at 30-35%.

Has anybody here compared to the Moto G8 Power? Is the battery life even better?

GoogleoverK said:
Has anybody here compared to the Moto G8 Power? Is the battery life even better?
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Exactly how do you think a cheap SD 665 11nm chip with a 5,000mAh battery will do against a higher tier SD 730g 8nm chip with a 7,000mAh battery?
Hmmmmm ?

Devilmonkey27 said:
Exactly how do you think a cheap SD 665 11nm chip with a 5,000mAh battery will do against a higher tier SD 730g 8nm chip with a 7,000mAh battery?
Hmmmmm ?
Click to expand...
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Could have answered like a normal person.

GoogleoverK said:
Could have answered like a normal person.
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Click to collapse
I did... Exactly how do you think they will compare?

@Devilmonkey27 No need for snark...
It was a genuine question, try to provide a genuine answer. Please reply properly or don't reply at all.

Didgeridoohan said:
@Devilmonkey27 No need for snark...
It was a genuine question, try to provide a genuine answer. Please reply properly or don't reply at all.
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So exactly how do you think a phone with half the specs will do?

Devilmonkey27 said:
So exactly how do you think a phone with half the specs will do?
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Click to collapse
You're missing the point. My post has nothing to do with that...
I'm simply asking, that if you have anything to add to a thread, please do so in a constructive manner without snark or attitude. It would have been very easy for you to convey your message without being rude or condescending.
If you've got more to discuss on this particular matter, please contact me through a private message (to keep the thread on topic).

Devilmonkey27 said:
Exactly how do you think a cheap SD 665 11nm chip with a 5,000mAh battery will do against a higher tier SD 730g 8nm chip with a 7,000mAh battery?
Hmmmmm ?
Click to expand...
Click to collapse
To come back on it, I have it since today and so far it's looking like the G8 Power has better or equal batterylife, standby drain is somehow bad on the M51, I checked all apps. Still I'll let the software settle and get through more cycles and check Gsam Battery Monitor in a couple of days again.
I honestly blame Samsung's other apps that aren't used and aren't able to be disabled or uninstalled.

Hi guys. I wanted to let you know my findings and provide some test results of galaxy m51 battery life. Firstly, I will outline what was my priority for that test. I wanted to check how long the phone can last mainly on google maps navigation with additional apps in the background. Also this test is a bit static so to speak but had no chance travelling for so many hours. That said I believe SOT was tested correctly for my planned usage. I guess in a real case scenario, I would need to do some more browsing and perhaps occasional screen switch offs during a break like filling up the fuel or stop to rest on a bicycle.
How I performed my test.
1. I did some initial installations, downloaded my apps and logged in to social apps such as FB, Spotify so they can work in the background, send notifications etc.
2. Once I completed the setup, I charged the very new phone to 100%. AccuBatter reported capacity was 6800mAh designed capacity not 7000mAh and estimated capacity 6700mAh.
3. CPU-Z reported Snapdragon 730 so I regret it is not 730G and honestly I do not know how to check with online stores as the packaging does not help with this. Also, I plan to test POCO F2 PRO 8gb ram/256gb version the same way and see how it goes since I get better hardware, but I like SD card slot on galaxy m51. Very useful when resetting the phone.
4. Set google maps navigation, lunched another app which uses GPS and LTE for maps showing speed cameras, road works or dangers which I use alongside with google maps. I also start shuffle play on Spotify to imitate streaming the music in my car or on the bike.
5. WiFi, LTE, GPS, Bluetooth, sync was enabled, blue light filter enabled.
6. Between 15-20 apps were in the background.
7. I unplugged the device from the mains.
8. Initial 15% discharge was with a WiFi connection with my router. Then switched of my router for overnight, left wifi enabled on Samsung but it had to continue downloading data over LTE such as Spotify music streaming. I also changed google map setting to day light only to avoid night backlight.
9. I went to bed? and in the morning there was still a lot of juice.
10. Around 20% discharge I took about 100 pictures most of them in burst mode to simulate a trip where you simply stop and take some snaps.
11. I stopped the test at 1% discharge and noticed no heating problem. The phone was cool during the test.
The overall SOT measured until 1% discharge was a staggering 17h 50m? Below you will find AccuBattery screenshots. At remaining 15% I had still over 2 h 42 m of use left.
This phone reminded me of good, old days of my Samsung galaxy s3 with a Zerolemon 7000mAh?
Now with my galaxy s7 deteriorating battery (current capacity just over 2300mAh) this is a great thing. For Galaxy s7 I also own a KiwiBird powerbank case of 5400mAh right from the beginning wich did its job when away from the mains, travelling etc.
I guess for a more accurate SOT, I would need to add some phone calls and browsing but even with I deduct 2h, it is still nearly 16 h of use. Like for me excellent. I also do not plan gaming.
On the downside of this phone it seems like my galaxy s7 takes a bit better picture, but it just might be my perception of selfies taken. Back camera is also just ok on a cloudy day. Ok but that is an offtopic.

I got my M51 yesterday and I am not fully sure yet about battery lifetime. I have charged it to 100% and about 8 hours and 2.5 hours secreen time later I am at about 90%.
Coming from my Moto Z Play I am not sure yet if I stay with the galaxy. The Mot Z Play with Incipio OffGrid Wireless Power Pack mod is about the same size and weight. Though provides less capacity (3300mAh phone + 2200mAh power mod) but battery lifetime still was bout 3-4 days usually.
The M51 is also getting considerably warmer during use.
I noticed also the Samsung battery saver with medium settings can reduce the CPU clock to max out at 70% which is handy. Not sure if there is any undervolting, underclocking tools as I think I would be perfectly fine with less performance - actually I was able to reach insane battery life on my old Galaxy P1000 with TricksterMod and custom undervolting back in the days.
I still believe better lifetime with the M51 would be possible bz reducing CPU clock and also with better screen brightness control. I noticed many times already that the M51 screen was too bright for me and having to reduce the slider to "minimum" position or very close to it. Also I noticed that the screen brightness slider is not linear at all. So on the last notch on the left side the screen really starts to dim properly while to the right there isn't much change. Also I like still to use automatic screen brightness adjustments but found the automatic adjustment often moves the brightness too high.
Also a possibility to limit the used screen area (e.g. display black bar on bottom/top) would save energy on the AMOLED screen while still providing more than enough screen space.
EDIT: One-Handed mode sort of provides this feature, but not exactly what I was looking for (like cinema-bars on top and bottom and no prominent "one-handed-mode" title.
I will continue to use the M51 for a couple of charges and decide if I am going to trade it again. The phone itself is performing well, supporting VoLTE WiFi calling but seems to lack carrier aggregation for no apparent reason. I strongly dislike the slippery, fingerprint-attracting, cheap-looking plastic backside of it.
I also hate that everywhere you tap it tries to sign up to a Samsung account. Also replaced the launcher with Nova launcher.

Below is the answer to almost all above useless posts
Battery life tests - GSMArena.com
Why I say useless ?
Simply. SOT will be completely different when you read ebooks compared when you watch movies or browse Internet.
Gsmarena does standarised comparison
I am fan of long life battery phones. I used "king" Lenovo P2 for over 2 years. M51 is better.

I'm at the fourth cycle of charge.. and got 15 hrs so far.. have done a heavy idb debloating
maby it will increase over more charging cycles?

i m getting about 20h sot normal usage
facebook lite, browser , youtube , aliexpress and playing alphalt extreme 30 min
wifi and dark mode on
brightness between 10-40 %
data off
location off
this phone have a very good battery