Develop Bugs

[Q] NFC effect on battery life

Hello,
I want to know if my experience is common or not. I had my phone at ~90% and changed it to airplane mode to try and conserve battery while I went snowboarding. Got back to the phone about 7 hours later and it was dead. Plugged it in and turned it on and found out that "NFC Service" took up 80% of my battery for those 5 hours. When I turn NFC off this does not show in the battery log, but I don't want a major potential feature of this phone to be unusable. Anyone else experience NFC destroying their battery?
Thanks.

I am noticing my Galaxy Nexus not lasting as much as my Rezound did, but it had a larger extended battery. I also use Ultimate Juice to enable / disable my internet connection. So with my extended battery + ultimate juice + brightness on 30% or so I still have 29% battery after a full 25 hours. I would just disable NFC because I do not see it in my battery usage. It is only useful for Google Wallet, and wireless charging (correct me if im wrong).

I use the NFC quite frequently during the day by having various profiles set up around my house, and my battery seems to be fine. Are you using a custom rom or kernel? If the NFC battery issues always occur, I would try reflashing your Nexus. Seeing as NFC itself doesn't eat a significant amount of power, I would guess that the Android OS is being kept awake by the process.
Sent from my Galaxy Nexus using Tapatalk

Well I got annoyed and was one day from the end of my return window so I went to Verizon and told them I wanted another phone. They gave in and I just got the new one. Hoping the phone was the problem. I was unrooted with 4.0.2 installed. I don't have a huge need for NFC, but I don't like to think a feature of the phone was completely useless to me when I have seen others who leave it on with no ill effects.
Thanks

Pathetic battery life

Running 4.2.2 I get 9h of standby and 1h screen on at the most on a HSPA+ Galaxy Nexus using a OEM 2000mAh extended battery.
I checked wakelocks and there was nothing out of the ordinary. Anyone else getting this bad battery life?
A phone that dies half through the day with light usage is pretty much useless. (I've had to use the 1750, 2000 and the 3800 battery to come through the day.)

Depends if you have any apps syncing a lot or using the radios a lot.
Signal strength plays a big role in battery life as well.
Sent from my Galaxy Nexus using Tapatalk 2

Only Gmail/whatsapp sync a bit, the rest is all turned of/ wifi only. Used gps maybe 20min for google maps ans public transport.
Signal strenght was mostly good with the occasional no signal, 10 min total.
Still, it shouldn't be this bad.

androo45 said:
Only Gmail/whatsapp sync a bit, the rest is all turned of/ wifi only. Used gps maybe 20min for google maps ans public transport.
Signal strenght was mostly good with the occasional no signal, 10 min total.
Still, it shouldn't be this bad.
Click to expand...
Click to collapse
Try relocking your boot loader and flash a stock google img
Sent from my Galaxy Nexus

dude mine is like that and i have no idea why. i have a brand new extended 2100maH battery, underclocked, undervolted, no sync, no bluetooth or gps, with alot of apps that i feel drain power (maps, LWP, etc.) uninstalled. most i get throughout the day is a good 8 hours with 2 hours of on screen. i text but not that much. idk. weird **** yo
---------- Post added at 01:15 AM ---------- Previous post was at 01:09 AM ----------
btw im using sprints galaxy nexus running the unofficial xylon, with ak diamond19 kernel, with lte off, and pie controls.

Same here. I'll charge my phone to 100% set it down pick it up 15 minutes later 8-11% battery gone. No GPS, screen turned down, underclocked. I don't get it. I have a Toro also.. Just have to make due I guess till I figure it out.
Sent from my Galaxy Nexus using Tapatalk 2

I just started using a Nexus this week. I came from a RAZR M. The first thing I noticed was the lack of battery life. I found a couple tweaks to help with this issue.
They are: disable network time and date sync, 3g only till you really need to charge through some web browsing, undervolt to 1GHz, and minimal to 383 or so. I flashed the Franco kernel and use the Wheatley governor. Auto brightness was on auto. I also have the 2100mah battery.
I can almost reach 3 hours screen time per charge. I didn't realize that's a feat so I haven't taken a screenshot. My M got around 5 hours screen time. Ugh.. But the Gnex has won me over.
Sent from my Galaxy Nexus using xda premium

Try BetterBatteryStats, this will give you more information on what's going on behind basic android charts).
toro comes with 1850mAh battery(
Sent from my Galaxy Nexus using Tapatalk 2

Something is definitely wrong bro... I have the same gsm model with the stock battery. With light usage I can easily go about 36 hours off the charger with 3 hours screen time. Sync with Gapps, Facebook, Keep, Drop box, Google +
Something is Jacked up somewhere...
Sent from my Galaxy Nexus using xda premium

Use trickster mod to see if your device is deep sleeping. I've had deep sleep issues on 4.2.2
Sent from my Galaxy Nexus using Tapatalk 2

And if you undervolt too much it will actually destroy your battery life
Toro | Xylon | Diamond

My device is deep sleeping fine, it is really a 3G/data issue. On wifi I can get 4h screen on and days of standby, no problem. But on mobile data my battery just evaporates in thin air.
I think the real problem is the 3G radio power management, that was excellent on 4.0 or 4.1 (never had issues) but on 4.2 it is outrageous.
The thing is, on wifi (home/work/...) I have the possibility to charge my phone. If I'm on HSPA+, I haven't.
My stats on wifi at the moment: 2h standby, 35min screen on 89% left.

Select 2G only if you do not really need 3G or LTE for phone and data! For simple phone calls or texting, the quality is not much different between 2G, 3G or LTE. In fact, in my city, there is more 2G than 3G and LTE transmissions.
It will at lease save you 30% battery.

I can put my phone on 2G only, but than I can't search something when I'm on a call, get delayed sms (really noticable). Not mentioning 2G is a pain in the ass, even for IM and email.
And constantly switching between 2G and 3G is also not a good option for battery life. Turning LTE off on a maguro won't do anything.

It doesn't matter how many features you turn off, battery life will not improve. Your phone will become a dumbphone and it will still die on you. I recommend to stop turning on the screen constantly and use it lightly. The screen used on this device is not efficient at all. I hope the next Nexus greatly improves on battery life or I'm switching to something else.
Sent from my Galaxy Nexus using xda premium

a1exus said:
Try BetterBatteryStats, this will give you more information on what's going on behind basic android charts).
toro comes with 1850mAh battery(
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
+1
Android OS is high, BBS will tell you what it is, it's usually a kernel wakelock. Also if you don't use Maps, disable it, because since they brought the offline prefetching, it starts services like mad and runs in BG. Android AOSP has it's own location services and MapView, so you won't loose that.

My phone has become almost unusable after receiving the 4.2.2 update (on Verizon, totally stock phone). Battery has gotten as hot as 113F at times, and I can watch it decrease 1% at a time very quickly...
BBS keeps pointing to Exchange. I removed the account the first day and added it back in and that seemed to have helped initially but now is no longer the case. I haven't wiped the phone in over a year plus so this is my next step.
Is there any way to see what apps were recently updated?

Same battery problems for me (maguro). Not long ago I could use the phone for around 48 hours without charging, and suddenly one day to another it all changed and is drained within 9 - 10 hours. I have tried everything:
- monitoring with betterbatterystats (nothing out of the ordinary),
- tried different roms (including stock 4.0, 4.1),
- tried monitoring with betterbatterystats without any apps installed (disbled google apps to prevent syncing), without wifi / 3g / location services / NFC etcetera, even without sim card. --> No big battery draining wakelocks.
- tried different kernels
- tried new battery
- checked if phone was going into deep sleep (did that fine)
All without any impact, the battery life is still very bad (easily draining 5+ % per hour, if it is on standby all the time).
I'm starting to think it might be a hardware problem, I don't know what to do anymore without sending it back for warranty.

3 initial things I always look for when diagnosing somebody's battery woes:
1) Have you loaded (adb then fastboot) the totally stock nexus images from Google's website? At least for 3 days and no additional apps installed
2) How old and what is the usage of your OEM battery? If you're using a 3rd party battery who knows what will happen
3) What's your signal strength like in your daily travels? Bad signal will eat your battery almost as much as screen time
If you still have bad battery after thinking about those 3 questions then you have a unique situation. Otherwise, your problem might be simpler than it seems

IMO, turning off gps/wifi etc doesn't really help with battery life, at most 1-2%. Usually what causes battery to drain faster is when apps prevent the phone from sleeping, or if they're constantly running in the background.

Horrible battery life on newish S4 Mini ("best" performance <3h)

Hey guys,
after dropping my beloved Nexus 4 to the concrete floor in May, I bought a new S4 mini in the electronic market because of it's decent size and all the fuzz about having a very good price-performance-ratio.
After a few weeks I already was fairly disappointed.
On an average work day (without WiFi) and little use (~30min OSD) the battery wouldn't last a full day. I tried the usual things like turning off GPS, bluetooth and using Wifi whenever possible (turning it off, when not in range), etc. I also used the App greenify which boosted my deepsleep in Wakelock Detector to stable 85+%.
When using GMaps/navigation my phone is getting hot (~50°C) and battery is drained within minutes. When trying to navigate out of the city (<15min navigation) one day my phone was discharged within 3 hours after a full charge. I got Wakelock Detector, Better Battery Stats and Battery Monitor Widget installed.
The only thing I found out, that when I am connected to Wifi the drain is a lot lower 1-2%/hour compared to when I am using 3G/H+ which results in 7-15%/hour (both when not using the phone), although there is no problem with signal quality. Recently my phone started to bottoming out rly hard when hitting the 20% mark. From there I can watch the battery dropping to 0% within a few minutes.
Things I tried so far:
- turning off features that are not in use (GPS, bluetooth, Wifi when not in range)
- make sure phone gets into deep sleep/greenify apps
- recalibrate akku
- reduce brightness & disable auto-brightness
Setup:
GT-I9195 bought in May 2015 from electronic market chain
CM 12.1 (Android 5.1.1, serranoltexx)
Standard CM Kernel
Baseband I9195XXUBML4
I can provide Screenshots from BMW, WD and BBS. Any ideas how to solve this or what else I could do?

Probably you should use something like better battery stats, to check
- if a service is going mad, then turn it off with disable service to test (most times happens with unclean flash)
- if you have an app with wakelocks
If you can't find anything that way, might be a hardware fault.

Personally if I came across this problem I would return the phone to stock Android and do some tests, see if the same happens again. CM12.1 can have issues across different same model phones. Try the Samsung Phone Info app to see how old your phone is. I'm guessing it was second hand? Some older revisions of the Mini had battery problems. Maybe a new battery is needed? Maybe.. As for the battery draining 20%-0% in minutes I have also suffered this on a brand new March 2015 device. Not all the time though it only happens with randomly once a week. But I put that down to the battery not been fully calibrated and then drained and recharged over the next 3 4 days, as I use a spare battery and swap out the batteries regularly which means my battery is very rarely calibrated.
All that said though I can easily get through an entire day if not 2. And using stock I'm able to get 4 and a half hours on average every time, maybe 4 hours of screen on time when using 3G a lot and GPS etc.

NNNexX said:
Hey guys,
When using GMaps/navigation my phone is getting hot (~50°C) and battery is drained within minutes. When trying to navigate out of the city (<15min navigation) one day my phone was discharged within 3 hours after a full charge. I got Wakelock Detector, Better Battery Stats and Battery Monitor Widget installed.
The only thing I found out, that when I am connected to Wifi the drain is a lot lower 1-2%/hour compared to when I am using 3G/H+ which results in 7-15%/hour (both when not using the phone), although there is no problem with signal quality. Recently my phone started to bottoming out rly hard when hitting the 20% mark. From there I can watch the battery dropping to 0% within a few minutes.
Click to expand...
Click to collapse
I have had the same problem as you.
I return twice my phone to vendor. But they could do anything.
I solved it with undervolting and underclocking my phone (only the low frequency).
I read from someone, you can undervolting 150 millivolt.
My experience, is undervolting 125 milivolt. and underclocking the low frequency at the minimum.
You didn't feel any difference, behalves that the phone is cooler and battery live is better.
My WiFi and Bluetooth are always on. I don't have to recharge my phone during the day.
It is so effective en transparent that I don't understand why Samsung didn't do it natively.

Hey,
I tried to apply some of your advice and flashed the newest stock rom for S4 Mini (Kitkat ...COE4).
In that process I recognized that the Baseband is not updated by CM and that the one that was installed when I bought it was fairly old (from 2013). Do you think that this might be part of the problem? (I sort of hate the Samsung Rom)
This week when working and not having Wifi all day, I managed to get 2h of SOT and still had around 25% left which I couldnt have gotten before imo. I only lose 1-4% per hour when the phone is not used. But still thats not pretty good, when ur saying you can get 4h with GPS and everything. I also didnt use GPS. And today when I restarted my phone it just went from 40-ish % to 15% without any reason. Any more ideas?
I installed BetterBatteryStats today and will try to give some more insight the next days. Wakelock detector said that I had 85% deep sleep (timeframe 1 day 2 hours).
Try the Samsung Phone Info app to see how old your phone is. I'm guessing it was second hand? Some older revisions of the Mini had battery problems. Maybe a new battery is needed?
Click to expand...
Click to collapse
No I bought it new from a electronic store (Media Markt). The app says that is was made on Oct 19th 2014 in Vietnam and that it is original/not refurbished.
How much do you gain by undervolting (SOT or % per hour when idle)?
How do you do it?

maybe the best way is to downgrade by flashing CM11 for example ...
(another way with stock + Alexax kernel + own debloat&freeze ... )
I have the same consumption problem with Resurection Remix LP too ..... very strange !
Lollipop is supposed to be less angry than Android 4.X.X ... but it seem have problem somewhere for our S4-mini sources maybe ,i don't know ...

This night I did some BBS tests:
Setup:
Stock Rom I previously installed (see posts above)
charged phone during evening
set up custom timepoint before I went to sleep
WLAN disabled
all apps greenyfied except those I deemed significant that they keep running (Whatsapp, calendar, Swiftkey, BBS, BMW, etc). Forgot newly installed app hoomn.
I had to upload the logfile to pastebin because it was too long for the xda forum: pastebin.ca/3256568 (I am not allowed to post URLs, sorry)
I lost 14% of battery during 9hrs (-1,6%/h). That's probably not too bad?
93% deep sleep, 33min awake time
Weird things I discovered/things I did not understand:
- negative Voltage loss?
- Wifi runtime 100% although I disabled it
- dominant wakelocks (count > 100, all of them < 30s): Alarm Manager, RILJ1, *net_scheduler*, GCM_CONN, ContextManagerWakeLock, Event Log Service, AlarmManager (com.sec.spp.push.Samsung Push Service), SyncLoopWakeLock, GCM_HB_ALARM
- dominant KWLs (count > 100): ril-fd (25min), bam_dmux_wakelock (13min), radio-interface (7min), PowerManagerService.WakeLocks (3min), mmc1_detect (1min), alarm_rtc, alarm, sec-charger-monitor, smdcntl0, pm8921_soc_lock, power-supply, KeyEvents, smsm_snapshot, qmuxd_port_wl_0, qmuxd_port_wl_1, smdcntl1, mmc0_detect
- Alarms (>20): ccc71.bmw (Battery Monitor Widget), android, com.google.android.gms, com.sec.spp.push
any ideas/assessments?

In your experience, how does wifi/BT/nfc standby affects battery?

Just want to know your thoughts about having wifi or Bluetooth enabled all the time, even with no connection or pairing with nothing, regarding battery life
I ask this because my test would not be accurate as I always use the phone differently (moving to different places, calling, music) apart from playing with kernel and other settings... So can't really tell the difference in that
Please don't tell me, just turn them off when leaving home or leaving your car. My point is to get it connected/paired with no need to unlock phone, turn on... etc... xD
About NFC I saw a module to enable it when screen off. But I read comments that it causes big drain, obviously

On the previous build MH19C I was pretty sure if wifi 5GHz is enabled and available, it will drain and also wake like crazy. This happens in my office but not at home where I don't have a 5GHz wifi or even wifi ac, but is widely used in office, with multiple physical AP's. Now already on the May update, I no longer enable 5Ghz wifi and backgroud scanning just to be safe.

Less than other devices due to the Android Sensor Hub and Doze.

while not in wifi i have data which drains tons of battery anyway, so i dont even bother with any miniscule effect wifi scanning might have. i would advise you to put it off your head too, there are thousands of tiny unessecary battery drainers in your phone, it would sap your mental health trying to deal with anything more than the big ones (data/screen/bugged apps) for only few % of battery.
if the phone is able to last till bedtime or return to home, then it does not matter to meddle with anything. charge it every night and if comes to worse it charges to 50% in few minutes

Thanks for responses
Giorgos Chatziioannou said:
while not in wifi i have data which drains tons of battery anyway, so i dont even bother with any miniscule effect wifi scanning might have. i would advise you to put it off your head too, there are thousands of tiny unessecary battery drainers in your phone, it would sap your mental health trying to deal with anything more than the big ones (data/screen/bugged apps) for only few % of battery.
if the phone is able to last till bedtime or return to home, then it does not matter to meddle with anything. charge it every night and if comes to worse it charges to 50% in few minutes
Click to expand...
Click to collapse
Exactly, that's why I want to know if the % is noticeable or not
It's a good advice. However it's also good to keep things in order because battery cicles are limited in phones and my goal is to keep the 5x more than 2 years xD
So I wouldn't be fine just getting at the end of the day, it's good to preserve and not drain unnecessary drain, considering this battery is not removable, plus it is already 'bad' being new haha
Sent from my Nexus 5X using Tapatalk

Javi22 said:
Thanks for responses
Exactly, that's why I want to know if the % is noticeable or not
It's a good advice. However it's also good to keep things in order because battery cicles are limited in phones and my goal is to keep the 5x more than 2 years xD
So I wouldn't be fine just getting at the end of the day, it's good to preserve and not drain unnecessary drain, considering this battery is not removable, plus it is already 'bad' being new haha
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
i dont know about battery cyrcles, but replacing battery on 5x is not hard - watch a video about it as to not make any hasty mistake, and its piece of cake.
also its better if the battery is not too low when recharged and not too hot. 5x already has a annoyingly protective temp threshold so you dont need to worry about ruining your battery that way, while its better to recharge every night (or more often if you need) even if there is plenty of juice in the phone cause that is healthier for the battery.

If reducing battery cycles is your main goal, you have to turn them off.
I'm keeping wlan (connected at least 50% of the time with decent-v good connection)/bt (most of the time no connection, only in car and for bt speakers) switched on all day and they together take 7-8% battery on (my) average use (~10-15% left before charging every night), of course much less (in relation) when heavily using the phone.

emp504 said:
If reducing battery cycles is your main goal, you have to turn them off.
I'm keeping wlan (connected at least 50% of the time with decent-v good connection)/bt (most of the time no connection, only in car and for bt speakers) switched on all day and they together take 7-8% battery on (my) average use (~10-15% left before charging every night), of course much less (in relation) when heavily using the phone.
Click to expand...
Click to collapse
Thanks
That's what I wanted, some numbers about your experience
Fine then. Once I get some rom and kernel stable I will check for myself. For now it will be disabled when not using (tasker helps too)

Standby drain

When you sleep, does your phone sleep, or does it stay up all night and crunch 1s and 0s? Rate this thread to express how you deem the speed at which the Google Pixel's battery drains under standby conditions. A higher rating indicates that when the phone is not in use, the battery drains minimally.
Then, drop a comment if you have anything to add!

First night dropped 12% in 6 hours. Not impressed. But I gotta break in that battery.
Sent from my Pixel using XDA-Developers mobile app

I've been losing around 3 % to standby drain over my typical heavy 9 hour sleep (Rx induced)!
I've had mine since last Tuesday.
5" Pixel version.
Battery doesn't seem to go down unless I really get on device for a couple minutes.
Wheee!
Sent from my sailfish using XDA Labs

Last night my pixel went down 2% over about 7.5 hrs so the standby time is pretty good.

My Pixel actually dozed for it's first night. We'll have to see if it keeps going. My N5x gave up dozing a long time ago.

The doze mode has been great for me so far. Standby time is better than any other android phone I've used.

From my other reply:
Battery has been pretty good for me so far. Seems to be settling in with optimization after a few days. Dropped 0% overnight last night which is awesome.
GSAM Monitor is saying my average is 19 hrs on, 4.5 hours of screen on time usage, 1-2 hours of screen off usage like phone calls, music.
EDIT: I also have pretty crappy signal at work.

Stand by time hasn't been a real problem for awhile. My Nexus 5 on KitKat and Lollipop(both before Doze) and only a 2,300mAh would only drop 2-3% over 8 hours. It's usage time that really matters.

Mine dropped about 10% the first night (Mon 24th), but I do live in an area that has poor reception. Have to place phone next to window just to get text and calls. If I go outside I may get LTE at 1 or 2 bars. Overall though battery hasn't been an issue and I love the rapid charging.

Am I the only person that turns their phone off at night?!

minty1978 said:
Am I the only person that turns their phone off at night?!
Click to expand...
Click to collapse
Good lord man!
My phone is my alarm clock, so I couldn't do that if I wanted to.

ourjim said:
Good lord man!
My phone is my alarm clock, so I couldn't do that if I wanted to.
Click to expand...
Click to collapse
I'm "blessed" with an extremely good body clock, which means I wake up at 6.30 every day without any alarm... Even at the weekends

minty1978 said:
Am I the only person that turns their phone off at night?!
Click to expand...
Click to collapse
Yes ! Now a days u are lmao

doesn't the alarm still go off when it's turned off? my galaxy note 4 does that

Probably.

Using Accubattery to measure screen off battery drain I am typically between 75-85ma. Has anyone else measured their standby power consumption, curious what other values are as this seems high to me.
Edit: more info
Tested it overnight with and without bluetooth on, got it down to 40ma without bluetooth, averaged 70ma with bluetooth on overnight. Also got to test a Note 4 under the same conditions though without a SIM card. The Note 4 was using 11ma without bluetooth and 18ma with bluetooth on. Both phones connected to the same WIFI the whole time. May have to do a full reset on the Pixel as the standby power consumption is definitely out of hand.

Standby
My Google Pixel currently drains an excessive amount of battery even on standby, however thanks to quick charging its up and ready in 15 minutes. OS seems to be heavy usage of battery at the moment.

guysalami said:
Using Accubattery to measure screen off battery drain I am typically between 75-85ma. Has anyone else measured their standby power consumption, curious what other values are as this seems high to me.
Edit: more info
Tested it overnight with and without bluetooth on, got it down to 40ma without bluetooth, averaged 70ma with bluetooth on overnight. Also got to test a Note 4 under the same conditions though without a SIM card. The Note 4 was using 11ma without bluetooth and 18ma with bluetooth on. Both phones connected to the same WIFI the whole time. May have to do a full reset on the Pixel as the standby power consumption is definitely out of hand.
Click to expand...
Click to collapse
While I still think the Samsung will have slightly better standby drain, this isn't a good test. You cannot compare a phone with a cell signal to one without. The biggest battery drain on a phone is typically cell signal.
If you pulled the sim card out of the pixel and let the phones sit side by side overnight, that would be something.

dbrohrer said:
While I still think the Samsung will have slightly better standby drain, this isn't a good test. You cannot compare a phone with a cell signal to one without. The biggest battery drain on a phone is typically cell signal.
If you pulled the sim card out of the pixel and let the phones sit side by side overnight, that would be something.
Click to expand...
Click to collapse
I agree, this test is not a great comparison. The Note 4 did still have cell signal as they do connect to service without a sim card, but likely it is not the same as having proper service (LTE). I was trying to get the lowest draw possible on the Pixel and managed to average 29ma in airplane mode. This is the lowest I have got yet with the device which although is decently low draw is still abysmal considering that it had no apps running and no radios active. What is even more interesting to me is that google claims that the phone has 456 hours of standby time which suggests radios active (at least cell), unless my math is wrong this works out to a standby drain of 6ma which at least on my phone seems to be completely unattainable even with radios off.
I have looked around the forums but haven't seen anyone else posting power consumption information with the regular or XL pixel so I have no idea if this is unique to my phone or just standard with the Pixel. I haven't yet factory reset the phone but that would have been next, except that I am exchanging the device due to an unrelated issue. I guess I will see how the next one stacks up in this regard.

Thought I would post an update on my findings. After getting a new device and still having issues I have an answer and partial solution to my terrible standby drain. The culprit in my case is LTE. I am on FIDO in Canada which does use Band 4 though I am not certain if that is being used in my area. Anyways if I set my preferred network type to 3g my standby drain improves dramatically as the device idles around 10-15ma in my pocket and overnight is more like 6ma which is phenomenal. As soon as I set my network back to LTE my standby drain is 70-90ma and at best 40ma overnight if I'm lucky. My cell service for 3g and LTE are both good (green in battery stats). I know LTE requires more power however I would expect that power requirement to drop significantly when connected to WIFI networks which in my case doesnt seem to matter at all. At least now my battery life is awesome as others have reported. However connecting to 3g when away from home is a bummer and it's not really practical to manually change my preferred network every time I leave or enter a WIFI area. Looking at a way to automate this switch but on Android 5+ it seems that changing these settings via app are very locked down. I would also like to point out that my previous phones never seemed to suffer from this issue which only further makes me suspect that there is an unresolved underlying issue here (maybe related to the Band 4 issues being reported?). It sure is nice to open my battery stats window now and see some horizontal line segments instead of the linear march towards zero.