Did anyone else purchase a device around mid November with battery life issues?
While observing the devices discharge speed in AccuBattery:
Screen on: 24.3 %/h
Screen off: 23.5 %/h
Right now: Never < 550+ mA
In short, the device has a nasty draw screen off.. For comparison, a Nexus 6p reports 2.9 %/h screen off and right now drops as low as 276 mA. Sure different screen technology, but I just wanted to share the results for the sake of the discussion. AccuBattery estimated 2.3 hours of screen on time. Amazon asked us to order a replacement and return the defective unit.
The device was running the official Oreo Beta build but the owner believes it exhibited these issues on the stock updated ROM.
Related
Introduction:
The venue and it's evil twin brother the venue pro are one of the handful of devices that are pretty much identical except for the OS installed.
The Streak 5 and 7 are known to have rather poor battery life. The V and VP though definitely seem to have improved on the battery situtation though. (And in the case of the S7 it has as much to do with it having a much smaller batt then similar 7" devices)
The V and VP are more or less identical when it comes to internal components, the only notable change is the addition of a hardware slider keyboard and a downgraded rear camera.
I am going to do a battery rundown test where both devices remain in standby the entire time and see which lasts longer.
Most devices make up claims of '2-400' (8.3-16.7 days) hours of standby, which is usually impossible to achieve while still fulfilling it's actual purpose (ie ever leaving standby). This is exactly what I'll be doing as I dont currently need either of them.
I will be measuing the time via android's battery graph, which states the amount of time that's passed since it was last fully charged.
Rationale:
Besides the OS's involved, the apps vary wildly.
Since this is dell: it's more interesting to see how much the drivers affect it (as dell is pretty bad with both making them and giving the sources to them)
The more tasks you do by hand, the harder it is to keep them perfectly in sync
I'm lazy (I'm currently not using either of them at the moment, so it's essentially a free test)
Technical details:
A US Venue
Rom: StreakDroid4 2.5.0 (408 based) [Android 2.3.3]
All apps frozen (which means they are installed but cannot be launched/do anything)
SD card removed (as android ocassionally scans it for media(?))
Clock settings: Ondemand 256-998 MHz
An AWS Venue Pro
Rom: 7720 (7720 Drivers) [Windows Phone 7.5 (Mango)]
No apps installed
SD card empty (nothing synced via zune)
Battery saver mode enabled
Common to both:
Batt charged to full (obviously)
Airplane mode
Wifi off
Bluetooth off
Auto-fetch/push/syncing/etc off
Empty Home screen/no widgets/no live tiles
Comments:
I cant say which will win at this point, the V has shown very consistant battery life for as long as I had it. The VP when I first got it had abysmal battery life, but recently it has shown very good battery life. The entire time I had few apps installed on it.
I dont expect to run them down all the way to 0% as that will likely take 2 weeks, I will likely do it approx a week as I'm currently testing CM7.2 for my S5.
The VP also takes forever to charge! Is anyone else upset by how slow it is? The V can charge from 10 -> 90% in the same time it takes for the VP to do 10 -> 65% (guesstimates).
They both use identical batteries. While it's true that slower charging is better for a battery's overall life, realistically few are expected to keep their phone to the point that the batt charge is the reason to buy a new one.
Table:
Code:
Time: V VP
13:55: 100% 95%
16:01: 100% 95%
22:43: 99% 93%
25:37: 99% 92%
38:12: 97% 90%
42:57: 96% 89%
60:53: 94% 86%
64:03: 93% 85%
65:57: 92% 85%
73:20: 90% 83%
84:45: 87% 81%
86:53: 86% 80%
89:53: 85% 80%
92:44: 85% 79%
94:16: 84% 79%
96:34: 84% 78%
106:46: 82% 76%
(All times are since last charged)
Conclusion:
I plan on concluding this at ~110 hours as I will be using my venue as my main again.
From the current trend, I can extrapolate thus:
Venue: ~550 hours standby
Venue Pro: ~400 hours standby
Is this realistic? No, not really, it might be due to the way the basebands (as that's what reports the % to the OS) calculates the batt %.
Even 400h standby feels like a streach, as tablets with much larger batts are expected to be in that range.
Regardless, it seems that the V has better battery life. The reason? It's either the drivers themselves or the OSs.
As this is the ODM's 1st WP7 device and 2nd Android device, it could very well be due to the drivers.
[Placeholder for graph, due to be released at completion of test]
A couple of weeks ago, I posted here about the strange battery level fluctuations that my Nexus 4 was experiencing. Based on the feedback I received, I decided to RMA my phone, and I received the replacement last week. The battery life wasn't too bad initially, but over the past few days, it's taken a nosedive.
Today, I used it to look up reviews on a book I was reading at Barnes & Noble. 10 minutes of screen-on time dropped the battery life to 88%. After I took a few screenshots to show you guys, the battery jumped down to 85%. You can watch it happen by viewing the shots in order. My ~12 total minutes of onscreen time today have resulted in a 15% drain, and that's pathetic.
I'm running XenonHD 9 with Faux's latest beta kernel. GPU is running at stock frequency; CPU steps are undervolted by -150 across the board. CPU Spy and Better Battery Stats reveal absolutely nothing out of the ordinary.
I just don't seem to be able to get the Nexus 4's battery life under control. Am I missing something here? Am I doing something wrong?
1cewolf said:
A couple of weeks ago, I posted here about the strange battery level fluctuations that my Nexus 4 was experiencing. Based on the feedback I received, I decided to RMA my phone, and I received the replacement last week. The battery life wasn't too bad initially, but over the past few days, it's taken a nosedive.
Today, I used it to look up reviews on a book I was reading at Barnes & Noble. 10 minutes of screen-on time dropped the battery life to 88%. After I took a few screenshots to show you guys, the battery jumped down to 85%. You can watch it happen by viewing the shots in order. My ~12 total minutes of onscreen time today have resulted in a 15% drain, and that's pathetic.
I'm running XenonHD 9 with Faux's latest beta kernel. GPU is running at stock frequency; CPU steps are undervolted by -150 across the board. CPU Spy and Better Battery Stats reveal absolutely nothing out of the ordinary.
I just don't seem to be able to get the Nexus 4's battery life under control. Am I missing something here? Am I doing something wrong?
Click to expand...
Click to collapse
As I can see from your screen shots, your phone has been of the charger for over 7 hours....battery drains even when your phone idles because does background processes.Sometimes battery doesn`t show that drain until you wake up your phone and do something with it! Your phone is fine, it doesn`t have battery drain
Yeah, I get that background processes are always running, but not even my Galaxy Nexus was this bad. I went to a graduation event over the weekend, and an hour of on-screen time dropped me to 58%. If I had kept going, I wouldn't have even come close to getting 3 hours, which some people have touted as a baseline measurement.
Oh well. I bought a Nexus 4 as a holdover until something actually good comes out, so I guess I'll just have to get used to this. If LG makes the next Nexus, I'm buying something else.
1cewolf said:
Yeah, I get that background processes are always running, but not even my Galaxy Nexus was this bad. I went to a graduation event over the weekend, and an hour of on-screen time dropped me to 58%. If I had kept going, I wouldn't have even come close to getting 3 hours, which some people have touted as a baseline measurement.
Oh well. I bought a Nexus 4 as a holdover until something actually good comes out, so I guess I'll just have to get used to this. If LG makes the next Nexus, I'm buying something else.
Click to expand...
Click to collapse
Try a new kernel. Trinity was amazing for me then updates destroyed my battery life. Now it's amazingn on Franco
I've noticed a gradual decline in battery life on mine as well. Completely unrooted stock.
Initially I was getting over a day easy with about 2.5 - 3 hours SOT, now I get 12-14 hours. Same exact usage.
The only thing that has changed for me since I bought it was the new updates to all the Google services ever since IO. That's when I started noticing the difference. I don't have concrete evidence that it's the cause, but I strongly suspect it is.
So, I had a situation where the first G4 i received was defective and I had another shipped, so for the weekend I had 2 G4's.
Considering all the back and forth I've read about the inconsistencies among phones, I decided to see if I could find any. The most glaring difference was between the screens on both. One had a cooler bias, while the other had a noticeable yellow tint. I much prefer the cooler bias screen. Second, I tested both phones for lag, stutter, missed touches, etc and couldn't find any difference between the two - both were basically flawless. Last was the most interesting though - battery run down. I ran 4 battery rundowns, switching the batteries back and forth so no consecutive test was run with the same battery. Both phones were charged with the stock charger (which BTW is definitely faster than a standard charger)
Tests were run in airplane mode, wifi ON, auto sync off, with a 1 hour YouTube Video on loop...
Rather than bore you with details, I'll leave you with a general summary...
-1 of the batteries continually got to 85% while the other was at 89% - this happened all 4 times.
-The battery which got to 85% first, took longer to 50% - enough so that it moved past the other battery which was between 47-49% at this point, and both batteries basically drained at the same rate for the rest of the time, and the battery with the faster initial discharge rate outlasted the other by approx 20 minutes each time.
-Each battery was tested at Auto, 50%, 25% and (using Lux) -10%, and here is what I found most interesting.... None of the brightness levels seemed to have any effect on battery life. That is, each phone, with each battery, drained at the same rate whether it was at 50% brightness, or at -10% brightness. The longest SOT I achieved was 7hrs 58min; again that's with all but WiFi off, looping the same 1hr YouTube video.
I'm guessing that's what LG means when they say the processor/GPU combo is "optimized" for this phone?? Now, I don't know if the same will hold true for 100% brightness levels, but the real world situation for 100% brightness is not really practical. I tested it on brightness levels I feel my phone would be at most of the time, then added the -10% as an experiment to see how much time it would add.
Recently, my XT1575 has been suffering from extreme battery issues. First, my phone battery would last about 6h but die (screen turns off with absolutely no warning). Recently however, my phone will last around 3-4 hours before dying. I was running the same flash of AICP before and after the issue developed, and have now switched to crDroid to see if the issue would be fixed, but it was not. I have included a screenshot of my battery graph by the end of the day. Please note that the gaps between the parts in the graph were only about 2-5min in real life, but show up as significantly longer in the graph for some reason. One thing I have noticed is as if the battery completed flat lines when it is not in use. It is almost as if it is forgetting to count down the battery so it thinks it has more battery than it actually has, but something lower level in the phone knows it doesn't have that much so it shuts down. Any ideas?
https://drive.google.com/open?id=1oxs4NdeLLVEGiaWmoh7tTUHJTiZ8xUTN
Could anyone with a Redmi K20/Mi9T report your battery discharge rate while screen is off? I am coming from a Redmi Note 3 and it seems noticeably worse from the time I bought it 6 months ago. Mine is anywhere between 1.8 to 2.5 % per hour. If I go to sleep with 70% it'd be below 60 by the time I wake up. The battery stats from settings showed that my device was not awake during that time. I tried uninstalling every non system app. My device is not set to sync even GMail. The device isn't rooted and if yours showed better results I would root and report more details on what might be the cause.
justmat said:
Could anyone with a Redmi K20/Mi9T report your battery discharge rate while screen is off? I am coming from a Redmi Note 3 and it seems noticeably worse from the time I bought it 6 months ago. Mine is anywhere between 1.8 to 2.5 % per hour. If I go to sleep with 70% it'd be below 60 by the time I wake up. The battery stats from settings showed that my device was not awake during that time. I tried uninstalling every non system app. My device is not set to sync even GMail. The device isn't rooted and if yours showed better results I would root and report more details on what might be the cause.
Click to expand...
Click to collapse
I agree with you.
I've done a lot of measurement on the drain issue in standby.
I am on EU weekly rom 'without root' and I follow with simple battery graph application for a better drain slope visibility. (Official gauge is far to be accurate!)
First finding, AOD is a big consumer ( some 1%/h) during day. That raise day stand by value to 1.5- 2%/h.
During night when phone temperature is stabilized (see graph) and AOD is ON we reach 1%/h.
Without AOD number fall to 0.3- 0.5%/h.
Question:
These numbers are high, but are they too high if we want AOD feature?
Sure they have a psychological impact because in 24h use we loose some 24% of a battery that can last 2 days, for "nothing".
I din't noticed any wakelock in one month test and drain in heavy use is normal. (EG: -13%/h in nave display ON.)
I hope Xiaomi Android 10 will improve with time.
Discussion is open.