A54 5G Battery draining after few days

[VincentKen]

Hi all,

has anyone noticed battery draining after few days of usage? I leave my phone without WiFi overnight on Power Saving mode with 4G/3G/2G enabled. For the first few nights the phone uses minimal battery capacity (1-2 %), but after few days it uses over 15%. Usually restart helps.

Any ideas how to resolve this issue?

Thanks!

[VincentKen]

Thanks @exe0cdc , this is an excellent finding!

Now it is just about to find the offending process, which I might be able to do with debugger/dev tools when it starts happening again. I'll try something like this: https://infoheap.com/find-top-processes-by-memory-cpu-on-android-using-adb/

[Amer99]

Please keep us updated when you find out how to resolve your problem

[exe0cdc]

I think that anything we do here will at most help diagnose the issue. If it turns out that some system process is causing the issue, then ultimately the onus is on Samsung to fix it via an update. It is interesting that nobody "official" has given any helpful feedback here yet in spite of this thread being so highly viewed and the product being new.

[exe0cdc]

The high CPU usage happened again today, but using `adb shell top` showed normal CPU usage results with no processes with abnormally high CPU %. Additionally, the total CPU utilization in top did not indicate that CPU usage was high at all.

So that means that either the CPU% stats on GSAM battery monitor are incorrect or they are calculated in a different way. Since the frequency of the CPU was high for the periods of high drain as well, I think there is still some truth to the findings, but it is not as simple as a misbehaving process.

[MrVik]

I'm having the same problem. Only first 2-3 days battery was fine, since then, standby drops from 7-15% for like 6-7 hrs like everyone here. Also SoT is drastically worse, only once i managed to get 7 hrs with 8% left, now i get like 3-4 hours on 20-30%, really really bad. I've upgraded from realme gt2 because of battery and now im angry. Ill try to restart my phone after every charge now as i read here. Hopefully samsung will take care of that in future update ? They better be quick ! 

[Rafael Faé]

My father's brand new A54 is also facing such massive battery drain. It's ridiculous. It loses 50% battery sitting the whole day on the desk.

Interestingly, battery consumption with screen on seems pretty ok. However, stand by consumption is huge, around 2%-2,5% per hour.

I tried to disable "Local" but It didn't work. Noticed It is related to internet (either to Wifi or Mobile data), since disabling both of them made me lose 2% overnight only. I am still enabling/disabling features to try to narrow down the culprit.

Thinking on returning this messy phone. 

[VincentKen]

I've finally got time to do a bit of debugging. I used dumpsys (docs: https://developer.android.com/tools/dumpsys#battery ) which returns extensive battery details.

Few notable things are:

All wakeup reasons:
Wakeup reason 260 119f0000.contxthub: 15h 41m 40s 210ms (120323 times) realtime

This wakeup event seems to correlate with the start of battery draining, but I have no idea what this is used for (some sensors probably, but why?).

It seems to correlate with battery usage in this output:

  Estimated power use (mAh):
    Capacity: 5000, Rated: 4905, Typical: 5000, Computed drain: 3280, actual drain: 3150-3300
    Global
      screen: 383 apps: 383 duration: 2h 34m 30s 175ms 
      cpu: 1163 apps: 1163
      bluetooth: 24.0 apps: 0 duration: 2h 40m 38s 968ms 
      camera: 6.80 apps: 6.80 duration: 2m 7s 516ms 
      audio: 0.716 apps: 0.716 duration: 1m 9s 698ms 
      video: 1.37 apps: 1.37 duration: 1m 40s 863ms 
      system_services: 85.6 apps: 85.6
      mobile_radio: 555 apps: 137 duration: 1h 16m 29s 400ms 
      sensors: 95.4 apps: 95.4
      gnss: 16.7 apps: 16.7
      wifi: 31.9 apps: 3.23 duration: 3h 25m 18s 863ms 
      wakelock: 256 apps: 26.0 duration: 14h 38m 50s 67ms 
      phone: 46.4 apps: 0 duration: 30m 56s 262ms 
      ambient_display: 0.839 apps: 0 duration: 2m 4s 843ms 
      idle: 645 apps: 0 duration: 1d 21h 4m 25s 722ms 
    UID 1000: 467 fg: 3.83 cached: 0.380 ( cpu=460 (8h 46m 27s 185ms) cpu:fg=2.74 (4s 187ms) cpu:cached=0.380 (535ms) audio=0.00929 (904ms) mobile_radio=2.03 (37s 361ms) sensors=84.2 (8d 21h 32m 59s 695ms) gnss=1.67 (1m 23s 901ms) wifi=1.09 (24s 606ms) wifi:fg=1.09 wakelock=2.93 (10m 2s 349ms) reattributed=-85.64621361 ) 
    UID 0: 466 fg: 0.0240 ( cpu=233 (6h 16m 17s 707ms) mobile_radio=1.85 (33s 992ms) wifi=0.0240 (150ms) wifi:fg=0.0240 wakelock=230 (13h 9m 34s 147ms) ) 

That indicates that the most consuming apps are not user apps 😞

The most used app (browser) used just a fraction of battery power:

UID <REDACTED>: 282 fg: 126 bg: 0.158 cached: 2.64 ( screen=150 (52m 54s 721ms) cpu=128 (32m 45s 251ms) cpu:fg=126 (3m 1s 332ms) cpu:bg=0.156 (438ms) cpu:cached=1.74 (26s 213ms) audio=0.284 (27s 616ms) video=0.967 (1m 11s 46ms) system_services=2.12 mobile_radio=0.841 (15s 465ms) mobile_radio:cached=0.841 sensors=0.0140 (26s 515ms) wifi=0.388 (4s 514ms) wifi:fg=0.335 wifi:bg=0.00190 wifi:cached=0.0506 wakelock=0.00443 (911ms) ) 
    

I think it is Samsung's turn to fix this and clarify the root cause.

Ideally, please, report this issue via Samsung Members -> Support -> Send feedback -> Error reports
More people report, more likely Samsung will fix it. Thanks!

[Rxb]

Samsung! You scr**d up something. It's a shame to come out with a phone that has not been thoroughly tested. But ok, everyone makes mistakes, but in this case Samo does not give a s**t, no support whatsoever. What kind of ah's are you there? Leaving customers alone? At least give some improvements you sob's! Shame on you!

[VincentKen]

Hi all,

It seems I might have found a work-around. I use Samsung E-mail app to sync e-mails, contacts and calendar. E-mail sync schedule was set to "Auto (when received)". When I changed it to "Every 15 minutes" the battery draining seems to be resolved.

[Rafael Faé]

Huumm, I dont think this is related.

My father uses Gmail instead. And symptoms are exactly the same as the others.

Funny fact is that I doesn't make a difference at all if you disable wifi/mobile, enable battery saving.

It still drops 2%-2.5% an hour without touching it.

It's either a ridiculous system software bug or faulty hardware.