BCOKAS model here on the latest firmware. Just wondering if 1-3% drain is normal in sleep mode in an 8 hour period? If so, I can stop obsessing over the battery.
Also, with normal use browsing the internet, is about 10% drain normal for 1 hour of use at around 20% brightness?
Thanks in advance!
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?
Hi guys,
I'm using GingerMod v0.3 with the default kernel (ninphetamine 2.1.3).
My battery was at 100% when i went to sleep. After about 8 hours when i woke up, it dropped to 92%. Is that normal?
I have turned off automatic sync as well as gps. Even "Back up my data" and "Automatic restore" was off. Display was at a minimum 3%. Most of the battery % was used up by Android OS.
given the percentage of the draining 8% over 8 hours i quess is pretty good. I quess different rom + kernel produce different effects. Yours is considered ok.
ya the drain is quite normal
elnoxvie said:
given the percentage of the draining 8% over 8 hours i quess is pretty good. I quess different rom + kernel produce different effects. Yours is considered ok.
Click to expand...
Click to collapse
1% an hour during sleep mode is considered good? i had the impression that it would only drop 3-4% during sleep.
shadowcaster31 said:
1% an hour during sleep mode is considered good? i had the impression that it would only drop 3-4% during sleep.
Click to expand...
Click to collapse
More than good I'd say. And you never can have a constant rate, one night it will be 3-4%, other night it will be 9-10%, depends on the processes running at that period. If you have Better Battery Stats installed then you will be able to see what had cost that extra drainage under Partial Wakelocks section.
I normally have 3-4% drain in an overnight period of 8-9 hours, but yesterday it was 15%. Then I saw it was Camera360 Ultimate which was running and searching for GPS!
Regards.
That's about similar to what i get on standby with data enabled so yeah good battery there/
Thats good ? Mine drops 1 percent overnight (+-10 hours) with original battery Or stays at 100 until morning when I wake up with 2000mah bat... Data and wifi turned off.
But I presume thats just me being battery friendly user
I tried better battery stats and it seems the Email app is consuming the most resources during sleep. hmm...
So I have narrowed down why my battery dies even when I'm not using my phone...for some reason when I look at the stats under battery usage, the battery seems to be awake almost 60 to 70 percent of the time, EVEN when I'm not using the phone...my battery lasted a total of 15 hours...I made a 20 minute phone call and screen usage was 25 minutes on lowest settings....4g was on wifi was on...automatic background data was off...gps on....everything else was off....why is the phone waking when it is not being used???? any way to find out?
seansk said:
So I have narrowed down why my battery dies even when I'm not using my phone...for some reason when I look at the stats under battery usage, the battery seems to be awake almost 60 to 70 percent of the time, EVEN when I'm not using the phone...my battery lasted a total of 15 hours...I made a 20 minute phone call and screen usage was 25 minutes on lowest settings....4g was on wifi was on...automatic background data was off...gps on....everything else was off....why is the phone waking when it is not being used???? any way to find out?
Click to expand...
Click to collapse
Have you tried restarting your phone and then tracking the battery usage?
Just my .02 here, I installed Earth HD live wallpaper and the phone went crazy. I keep it plugged into my laptop during the day and noticed that the battery was slowly draining instead of maintaining, not much only a couple of percent. Toward the end of the day I noticed the the battery charge was in the 50% range and dropping fast, you could see the go down so I did a reboot and the charge came back at 4%. So you may want to look at what you have installed and try removing apps that may cause issues. I removed the app and now no problems, I'm also using Beastmod.
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.
Whenever I change the original battery of my Redmi 1s with a Nohon replacement one, with same settings the standby drain goes from 1% every 3hr to 1.5% every 1 hour, thats over 4 times worse standby performance. Looking at battery stats when the Nohon battery is in, the phone is kept awake alot by Android (around 1hr for every 4hr standby). However the battery performs better in actual usage, if I play a game for 30minutes the Nohon loses a bit less percentage. I can replicate the problem over and over again whenever I change the battery back to 3 year old original, stanby drain stops and awake time by Android stops rising.
Its supposed to be one of the best brands for replacement batteries so why is it causing this standby drain issue, is this normal when you change a battery on any android phone and do most people just not notice it?
bump
bump, is it worth buying another replacement battery or is this something that normally happens with replacement batteries?