Hey,
I'm having problem with my Nexus 7. I have Android 4.2.1 on it. I've been using it for about a week now and every night i would turn it off, but in the last few nights, i decided to leave it on sleep mode to see how the battery life was. On the google site, it says that the Nexus 7 should have 300 hours of standby. Is that the same as 300 hours of sleep? Because when I left my Nexus 7 on overnight, it drained from 55% to 33% in about 8 hours. That doesnt seem like 300 hours to me. Also, I've tested it again, started at 100%, no wifi, no gps, no apps running in background, no syncing, in sleep mode, and it's draining at about 2% and hour. I've read on this forum that people have been getting like 2% every 8 hours on sleep, or even overnight. Does anyone have any suggestions on how to fix this? I've never used 4.1.1 so I dont have anything to compare it too. Does the 300 hour standby time mean powered off Nexus?
Thanks
I had the same problem. After going through all hoops i gave up and did a factory reset. I recently found a post that explains what i did..
http://forum.xda-developers.com/showthread.php?t=2059127
Battery Drain
chewy111 said:
Hey,
I'm having problem with my Nexus 7. I have Android 4.2.1 on it. I've been using it for about a week now and every night i would turn it off, but in the last few nights, i decided to leave it on sleep mode to see how the battery life was. On the google site, it says that the Nexus 7 should have 300 hours of standby. Is that the same as 300 hours of sleep? Because when I left my Nexus 7 on overnight, it drained from 55% to 33% in about 8 hours. That doesnt seem like 300 hours to me. Also, I've tested it again, started at 100%, no wifi, no gps, no apps running in background, no syncing, in sleep mode, and it's draining at about 2% and hour. I've read on this forum that people have been getting like 2% every 8 hours on sleep, or even overnight. Does anyone have any suggestions on how to fix this? I've never used 4.1.1 so I dont have anything to compare it too. Does the 300 hour standby time mean powered off Nexus?
Thanks
Click to expand...
Click to collapse
Try turning on the display screen before unplugging the charger, then turn your device off. Do it all the time and your battery should last.
Related
Let's collect some statistics regarding battery discharge rate when tablet suppose to be asleep, like overnight.
I'll start:
ROM - TnT lite 4.2, WiFi On, BT Off, in 10 hours 14% charge drop - 1.4% per hour.
with WiFi Off - around 1% per hour.
I was killing all apps on background before going asleep but this does not affect discharge rate too much, maybe 0.2% and as well might be just measuring error.
What is your tablet's discharge rate?
vegan 5.1.1 clean install, no additional kernel/OC tweaks
lost 30% over 6.5hr of sleep. battery usage shows very little idle time and alot of "android system". i wonder if that means something stayed awake and kept the tab from sleeping or what. o, and wifi was on and awake the whole time too
anyway to put this thing to sleep and last a few days like my HTC mytouch3g when i put it into airplane mode? that phone would drop to the lowest clock speed and sleep with very little battery drain
atb1183 said:
vegan 5.1.1 clean install, no additional kernel/OC tweaks
lost 30% over 6.5hr of sleep. battery usage shows very little idle time and alot of "android system". i wonder if that means something stayed awake and kept the tab from sleeping or what. o, and wifi was on and awake the whole time too
anyway to put this thing to sleep and last a few days like my HTC mytouch3g when i put it into airplane mode? that phone would drop to the lowest clock speed and sleep with very little battery drain
Click to expand...
Click to collapse
Why not just power it all the way off? Deep sleep is essentially Off anyway, minus the bootup time.
Cold start is about 50 seconds. When starting from standby - almost instant.
It would be nice if our GTablet can go into standby and don't lose charge with that rate.
Vlad_z said:
Cold start is about 50 seconds. When starting from standby - almost instant.
It would be nice if our GTablet can go into standby and don't lose charge with that rate.
Click to expand...
Click to collapse
Nice, but impossible. Just plug it in overnight. If you want it "always on" you can expect about 16 hours of standby with 4-6 hours of use mixed in. I'm so used to daily charging it doesn't even bother me anymore. Just really happy this thing goes all day on wifi without deep sleep... good enough.
Well, I am inclined to think that this is a software problem (Android OS). Xoom with HC does ok when in sleep mode. Someone say 3%-4% overnight.
Vlad_z said:
Well, I am inclined to think that this is a software problem (Android OS). Xoom with HC does ok when in sleep mode. Someone say 3%-4% overnight.
Click to expand...
Click to collapse
Only way it would do that is deep sleep. As in, nearly off - everything powered down except ram, CPU halted.
That's essentially the same as putting your laptop to sleep, vs power down.
The GTab's deep sleep sucks. Not sure what's wrong with it, but it's below the level of android. So it could be a firmware issue. I'm happy with the 2-3% per hour drain when "on" but screen off, connected to wifi, able to generate alerts and alarms.
So, my interest was piqued
I use pershoot's UV/OC kernel, keep wifi on all the time, and use softlocker to make sure my gtab *never* deep sleeps. This is on Vegantab-ginger.
I installed batterymonitor widget, and am collecting data.
First interesting tidbit, my "screen off, but wifi on/not really asleep" power drain is 125mA
Given the 3650mAH rating of the battery, that gives me 29.2 hours total standby time in this state.
Working backwards, that's a drain of just under 3% per hour.
You're actually seeing MUCH WORSE than that, at 4.6% per hour (30% over 6.5 hours) so I agree with you, your software is doing something very bad. You can get nearly 50% better battery life by using gingerbread, pershoot's kernel, and keeping it from going into deep sleep
my tablet lose near 10 %
n21klin said:
my tablet lose near 10 %
Click to expand...
Click to collapse
Any more details? Number of hours on standby? ROM version? Was it deep sleeping (wifi off, clock/time not updated until a few seconds after power on?)
Assuming 8 hours or so sleeping, this is much closer to the expected 1.125%/hour discharge rate for "deep" sleep, or about 90 hours total on deep sleep standby.
schettj said:
Any more details? Number of hours on standby? ROM version? Was it deep sleeping (wifi off, clock/time not updated until a few seconds after power on?)
Assuming 8 hours or so sleeping, this is much closer to the expected 1.125%/hour discharge rate for "deep" sleep, or about 90 hours total on deep sleep standby.
Click to expand...
Click to collapse
if that was indeed true (that you manage to get your tab to sleep for 8 hrs and only losing 10%) then i want whatever you got. I want my tab to be able to sleep for 3-4 days, even if it mean having to settle for JUST 1.0 Ghz
The lowest I've seen so far in batterymonitor widget is ~108ma draw (screen off, 214mhz clock, wifi off)... if the thing goes into "deep sleep" then batterymonitor (and everything else) stops dead, since the cpu is halted - you'd need to poke it inside to see what the load is when deep sleeping.
108mA gets you to 33 hours. To get to 72 hours you need to get the load down to about 50mA. That's the budget to keep the ram chips powered, and the on/off buttons
Battery drain with ext3 partition and S2E?
Is there a perfect way to check what's draining your battery? Recently I've been noticing that my battery consumes almost 20% of charge during night, whereas it used to only eat about 5% in my previous installation of CM7.
First install of CM 7.0.3 - Good battery life, night drain is only about 5-8%.
Second install of CM 7.0.3 - Worse battery life, night drain is about 25%.
The main difference in the second install in that I have made an ext3 partition in the sd card and I am using S2E and have moved some apps to the sd card. Will this consume more battery?
Had a look at the battery history in spare parts, and I see that the partial wake usage by Maps and K9 mail topped the list. Uninstalled both to see it they were the issue. I have Juice defender plus where I have configured data off hours from 12:30 am to 6 am. Still it drinks battery. Any thoughts?
I find that my Touchpad seems to lose quite a bit of battery while it's sleeping overnight, when compared to something like my Nook Color running CM7 n173. The Touchpad will lose 4-6% sleeping over 10 hours, and the Nook will be hard pressed to lose 2.
Is there something wrong with my battery, or a setting I should be changing (wifi and backup are off)? Or is this normal for Touchpad deep sleep?
are you saying you have wifi and backup off or asking if you should turn them off?
mine probably looses that much in that period of time with everything on and idling...
Yeah, they're both off when I leave it overnight.
Well my touchpad has been off my touchstone since 7 this morning, now 15:00. I have checked twitter, facebook and ebay about 4-5 times since then and my battery is on 100% . Thats with 3 programs running and WiFi on.
I can't give you on overnight figure as it sits in my touchstone
Does it really matter if you lose 4 to 6% in 10h overnight? As long as it doesn't drain at a stupid rate with wifi etc turned off and whilst doing nothing, surely there's nothing to get concerned about. Frankly, I have no idea how much battery mine loses sleeping, or doing anything else for that matter - I just use it, when the battery needs feeding I plug it in - drama over
Lyphen said:
Yeah, they're both off when I leave it overnight.
Click to expand...
Click to collapse
why wouldn't you just turn it off then... or was this just an experiment to see what kind of battery life you're getting
With backup off and wifi on, OCed to 1.7ghz, my battery stays at 100% if I leave it off charge all night, around 7-8 hours.
Some moderate use throughout the day, and watching some YouTube videos before bed, wifi on and brightness up, mine easily lasts 2 days before needing a charge.
did a test... with backup and wifi on with 3 email accounts being pushed... unplugged and fully charged at 3pm... 9am this morning i'm at 75%... that's with some light usage as well... not bad for 18 hours
i'm over clocked at 1.7 with warthog kernal and have all the suggested patches installed to speed up performance...
Quick question - what's the backup that everyone is talking about turning on/off?
phobos512 said:
Quick question - what's the backup that everyone is talking about turning on/off?
Click to expand...
Click to collapse
settings>backup
edit:
link
http://kb.hpwebos.com/wps/portal/kb2/na/touchpad/touchpad/wifi/solutions/article/19388_en.html
Before flashing CM9 to my mopho I had only used the stock rom, on Gingerbread my battery would last for 1.5 or 2 days, but since i updated to ICS it dies whitin 10~ hours of idle...
it usually goes from 100 to 70% overnight (6 hours). Recently I purchased Juice Defender Ultimate hoping it would help fix this issue, well... it did help but id didnt solve it, went from 30% overnight battery drain to 15-20% with airplane mode enabled in JDUltimate.. wich is ALOT from what i've read most users are getting (1-2% overnight, am i right?).
I've wiped my battery stats over and over (even tried the market app method) and nothing has changed.
I installed BetterBatteryStats and Watchdog from market, and both of them and the android battery stats show that "suspend" or phone idle are the cause of my battery dying so fast.
If anyone experienced anything similar and knows a way to fix this I would really appreciate it!!
Ive never seen my Photon go overnight with only a literally 1-2 percentage loss.. Not on stock, Cybiks CM7, or on CM9. but it usually only drains maybe 10 or 15 percent on higher end so nothing major. Talking ~8 hours off charger idle with random text or two and led going nuts blinking all night with data/wifi/bluetooth etc off but NOT in airplane mode. Are you on latest CM9 build? My bet is you have a random app screwing with phone keeping it from entering sleep mode or whatever its called. Check the "Awake" time under the battery settings to see if the awake time is allot higher than the "Screen off".
I have the same problem, no matter what kernel, no matter what cm9 build, still draining too much in idle. I know, others don't have such draining. But I give up and I am back on cm7, where everything seems fine.
I noticed that this happens to me as well. Previously, I fixed this by re-calibrating the battery. Now I was suspecting skype, but it is not causing this. I have noticed that having both GPRS/3G enabled and Wi-Fi drains power very quickly (about 4 times faster than having only one of those switched on). I'm using Photon in Europe in GSM network, so not sure is it the same with CDMA.
w0lf215 said:
Ive never seen my Photon go overnight with only a literally 1-2 percentage loss.. Not on stock, Cybiks CM7, or on CM9. but it usually only drains maybe 10 or 15 percent on higher end so nothing major. Talking ~8 hours off charger idle with random text or two and led going nuts blinking all night with data/wifi/bluetooth etc off but NOT in airplane mode. Are you on latest CM9 build? My bet is you have a random app screwing with phone keeping it from entering sleep mode or whatever its called. Check the "Awake" time under the battery settings to see if the awake time is allot higher than the "Screen off".
Click to expand...
Click to collapse
during night, "Awake" seems to be up about 50-60% of the time, a lot more than "screen on"
I´ve read that setting your phone to "never turn screen off" shuts down suspend process and battery actually lasts longer, has anybody tried this??
Are you guys logged into Latitude? I signed out of it yesterday and now after 10 hours on battery, although 6 of it was sleeping, I still had 86% left.
knG333 said:
Are you guys logged into Latitude? I signed out of it yesterday and now after 10 hours on battery, although 6 of it was sleeping, I still had 86% left.
Click to expand...
Click to collapse
Thanks, I logged out already will report back after some time
I am not sure, but never logged in latitude myself, so I think, no.
And CPU was perfectly sleeping with turned off screen. But still the same draining. And what I know, it has nothing with gsm.
I as well am having the same problem, dropped from 88% to 72% within 20 minutes.
phone idles killing my battery at 50% any fixes?
try wiping battery stats in recovery with a full charge
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 Huawei Mate 9'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!
4% during my sleep, wifi and sound are on, impressed
Sent from my MHA-L29 using Tapatalk
During sleep, doing nothing < 0.4%/h
Standby drain is 1%/hour. Deep sleep is also bad. Firmware ver C185B110.
I'm not sure if is related to any app I use
dancrow said:
Standby drain is 1%/hour. Deep sleep is also bad. Firmware ver C185B110.
I'm not sure if is related to any app I use
Click to expand...
Click to collapse
Same as me.. hoping it gets better though..
from 23:00 to 9:00 battery drained from 14 to 8% with everything on (2 sims, 3g&4g+, wifi on - not connected, location on.
I think that at some level depends on how long we have it. I find that the the power consumption raises as day goes by.
I loose 1-2% of battery per night. Tweaked settings a bit. . Wifi/Bluetooth/NFC off during night. Check which apps are are eating your MaH in battery usage details during night time. For example my biggest eaters are Google Fit with approx 5 MaH per night and Swift Keyboard with about same + Hardware consumption of course, phone standby, device idle,... I have set most my applications to automatically close after I lock my screen. So I don't have to do that manually.
3% in 9 hours. 3 apps left running in the background (FB, FB messenger, and trigger). BT off, Wifi & mobile data on (2 active SIMs).
Very simple solution how to conserve power and increase standby time during your sleep is to turn off wifi and bluethooth. Unless it's critical for you during your sleep. For example today I went to sleep with 66% battery left, slept 9 hours and woke up with 66%. Less than 1% battery consumed over 9 hours.
I will try this.. thanks
I just got this phone 3 days ago, on its second charge and I went to bed last night at 11 o clock. Went from 92 to 91 percent when I got up at half Pas 6 this morning. Can't complain there
Still on the 126 firmware tho.
Edit/
So I got the update to 138 a few days ago and things looked real bad. At first, for some reason the battery got about 20 percent worse than at 126. I'm not a Facebook user so I can't blame Facebook nor messenger for that, I don't have those apps installed.
Now after a few days battery had gotten a lot better with this firmware and now I can say it's pretty much the same as the 126 update. Maybe even better!
Sent from my MHA-L29 using XDA-Developers Legacy app
My standby drain is pretty bad for a phone with such a huge battery. I just wiped the phone yesterday (for the third time), didn't recover from backup but set it up as a new phone to avoid the Google Sync problems I previously had. I installed just 8 apps: Twitter, Whatsapp, Telegram, Snapseed, Yelp, Youtube Studio and Spotify.
After 50% have gone, I have 2:50min of screen on time. As you can see, the phone wakes up way too often. In the very beginning of the graph I just unplugged the phone and let it rest. It seemed to deep sleep, but still lost about 6%. I also turned off wifi for an hour somewhere in the middle, but it doesn't show up. The battery life could be just so much better.. It's just disappointing.
I put the screenshots in the Google Drive. Can't post them here for some reason?! https://drive.google.com/open?id=0BzAs5-iV39iCTUpnYmpiLXJ5WEk
My standby drain is under 0,3%. Really good.
Kurt45 said:
My standby drain is under 0,3%. Really good.
Click to expand...
Click to collapse
Went to bed last night at 9pm with 55℅ left. Got up this morning at 7... Phone was at 54℅.
That to me is pretty awesome...
whelmar said:
Went to bed last night at 9pm with 55℅ left. Got up this morning at 7... Phone was at 54℅.
That to me is pretty awesome...
Click to expand...
Click to collapse
Did you have/keep Wi-Fi or data connection on all this time? What firmware version do you have?
dancrow said:
Did you have/keep Wi-Fi or data connection on all this time? What firmware version do you have?
Click to expand...
Click to collapse
yes, wifi on and mobile connection/data connection were all active...I don't disable anything...two gmail accounts full sync, and exchange account set to push...all location services on, etc... B138
My PD Mate 9 having drain issue, fully charged, unplugged at 23:00, in 06:30, battery left only with 81%.
Left overnight for 8 hours, decreased 3%
David_Parker said:
5% during my sleep, cellular network and wifi are on
Click to expand...
Click to collapse
And if if you turn off, it will drain 0%in 7h 8h.
Hi,
On marshmallow and nougat with no user apps installed, ie 'factory reset' I have noticed I sometimes get excellent battery, eg I lose pretty much just 2% in an 8 hour period.
However sometimes it is 2% per hour.
It is not an app causing this, no wakelocks that I can see. It seems like maybe a certain sensor gets 'stuck on' and keeps draining the battery.
It happens when not in aeroplane mode as well but is less noticeable as the battery is drained by normal use then as well.
At first I thought it was maybe google play services body sensor permissions causing it but I removed permissions and the drain still happened.
Anyone else noticed this.
I'm a bit OCD about battery, on my moto g 1st gen I only lost 1% max overnight in aeroplane mode so 2% per hour cannot be right.
Scott
FWIW, I was at 100% before bed last night so left mine in aeroplane mode overnight.
Was at 96% nine hours later. I was very pleased with that.
Thanks for the reply. I returned my phone and got a new one. Old one drained 2% an hour. The new one drained 1% in 7 hours last night. So I think the old phone was faulty.
Hopefully the new one doesn't develop the same fault.
Scott
Looks like my new phone has the fault as well. Something causes the phone to use 2% per hour over and above normal use. Probably a sensor stuck on and using power.
I will return this phone as well and give up on Wileyfox.
Scott