Develop Bugs

Find 7a x9006 battery charging issue.

I am using AICP rom, sept 9 release version. I have the issue with the battery wherein the phone turns off when the battery level is at around 61%. I have tried battery calibration app more than once but it does not seem to help.
Another strange thing i notice is when the phone turns off at 61%. I connect the charger and i get the usual message from oppo about battery being low. It starts charging and it is at 0%. I let it charge for about 5 minutes and the battery level is suddenly 64% and i can turn the phone on. After that phone charges to 100% in under an hour even when using a non vooc charger. I cannot use the vooc charger with a custom rom because of the boot loop issue it gets into.
At 100% the voltage measured by CPUZ is 3886 mv.
Any idea how this can be fixed. Any help is greatly appreciated.
Sent from my Find7 using Tapatalk

DroidSK said:
I am using AICP rom, sept 9 release version. I have the issue with the battery wherein the phone turns off when the battery level is at around 61%. I have tried battery calibration app more than once but it does not seem to help.
Another strange thing i notice is when the phone turns off at 61%. I connect the charger and i get the usual message from oppo about battery being low. It starts charging and it is at 0%. I let it charge for about 5 minutes and the battery level is suddenly 64% and i can turn the phone on. After that phone charges to 100% in under an hour even when using a non vooc charger. I cannot use the vooc charger with a custom rom because of the boot loop issue it gets into.
At 100% the voltage measured by CPUZ is 3886 mv.
Any idea how this can be fixed. Any help is greatly appreciated.
Sent from my Find7 using Tapatalk
Click to expand...
Click to collapse
If your device is bootlooping with the vooc charger AND behaving strangely as described, I'm 90% certain you have failed hardware.
Either that or AICP is REALLY screwed up, check to see if this behavior occurs on ColorOS. If the battery voltage is 3.88 volts when the fuel gauge reads 100% something is VERY wrong. When charging, it should be at 4.2 or 4.35 volts (most Oppos are 4.35 thanks to a new battery chemistry and I think the Find7 uses 4.35v batteries) from 95-100% or so.
Battery calibration apps don't do anything and never have. No fuel gauge in existence uses batterystats.bin, and most of them have no interface between the kernel and userland to alter calibration.

Well i did some charging and testing and it seems like the issue is resolved.
As suggested on the oppo forums
i continued to charge even after 100% till the voltage reading was 4337 mv. Then deleted batterystats and rebooted. Phone lasted more than 24 hours and the system calibrated again. It reached 3% before dying after which i recharged again. At 100% voltage reading was 4337 mv.
Thankfully battery and hardware is not damaged. This is probably a weird android quirk.
Sent from my Find7 using Tapatalk

DroidSK said:
Well i did some charging and testing and it seems like the issue is resolved.
As suggested on the oppo forums
i continued to charge even after 100% till the voltage reading was 4337 mv. Then deleted batterystats and rebooted. Phone lasted more than 24 hours and the system calibrated again. It reached 3% before dying after which i recharged again. At 100% voltage reading was 4337 mv.
Thankfully battery and hardware is not damaged. This is probably a weird android quirk.
Sent from my Find7 using Tapatalk
Click to expand...
Click to collapse
Deleting batterystats does nothing and never has in terms of state of charge estimation. It ONLY affects the estimates of what app used the most power in Settings->Battery and NOTHING ELSE. It has been that way since the beginning of Android. Also, deleting it was pointless and redundant in this case, since charging to 100% does THE EXACT SAME THING. The only reason to ever delete this was if you had a severely failed device that never properly terminated charging, or one with a broken kernel that does not properly report charge termination to Android. (The last time I saw this were early Kindle Fire bringups back in the ICS days.)
However charging to actual proper 100% is likely what did the trick. Nearly all fuel gauge chipsets undergo a calibration cycle when charge termination occurs. More specifically, nearly all of them redefine 100% when charge termination happens.

I do agree that deletion of battery stats was not needed. But i just did it. One thing i did notice was the smaller file size when i had the issue - around 130KB. Now it is 143KB. May be incorrect file size also indicates an issue.
Sent from my Find7 using Tapatalk

Charging slowly

Hi,
I've just bought a new Nexus 5X, but now I recognizes that the nexus is loading extremly slowly (currently 1. Charge) when the screen is on. It takes around 10-15min for 1%. GSam Battery shows a loading of 100-200mA which is in my option to slow. I've read that many people have that issue. Isn't there a way of fixing it without rooting the device? Maybe get a new Nexus from the Reseller?
I've already tested a USB-C to USB-A adapter, but it seems that this has the same issue.

Not without rooting it. Im assumimg you already saw the thread here with the fix? If you turm the screen off it wil charge normally. Its a thermal issue.

I see. If my devices temperature falls to 34 °C it charges with 1200mA. What I recognized was that the amprage doesn't fall so much if the battery is cool in the beginning. (Now it's loading with 1000mA and a temperature of 38°C - 90%).
Why doesn't Google change the temperature? Normally there should'nt be a problem. It is working on other phones too.
I wouldn't root my Nexus so there is no other solution?
Is Google fixing something in Android N?

Concerning fast charging, I wonder what range of current people here can get. I have been using the nexus 5x for months and charge with original charger and cable from Google. When I plug it, the device says it's charging rapidly, but the current reading I get from apps like Ampere or Gsam, is at most about 1800mA. I get about 1% per minute of charging rate. Is it normal? I read in many other places it should charge faster and something like from 0 to 60% in 15 minutes

cescman said:
I get about 1% per minute of charging rate. Is it normal? I read in many other places it should charge faster and something like from 0 to 60% in 15 minutes
Click to expand...
Click to collapse
It all depends on how low your battery is. The sweet spot for fast charging is 0-40% where it's at its fastest. Something like 1.5% per minute. 40-80% it's still fast but slower. And anything higher is a slow charge. 90-100% feels like forever. Overall, I usually go 5% to 85% in 1 hour. 0-60% in 15 minutes is a lie if someone says the 5X can do it. Even something like the OnePlus 3 can only pull that in 30 minutes.
Sent from my Nexus 5X using Tapatalk

I have the same problem. Charges very slowly when the screen is on.

OhioYJ said:
Not without rooting it. Im assumimg you already saw the thread here with the fix? If you turm the screen off it wil charge normally. Its a thermal issue.
Click to expand...
Click to collapse
Which thread is that? I've been trying to search for that fix you mentioned.

Kkap4 said:
Which thread is that? I've been trying to search for that fix you mentioned.
Click to expand...
Click to collapse
I think he refers to this link: http://forum.xda-developers.com/nex...e-tweaking-t3395681/post67247726#post67247726

Kkap4 said:
Which thread is that? I've been trying to search for that fix you mentioned.
Click to expand...
Click to collapse
Its thermal throttle due to battery temperature.
See the thread here:
Link

Charging stuck at 98%

Since I received the band, I can't get past 98% when charging. Tried charging from 30%, 60%, putting it on charger several times when at 98%, but I've never seen 100%. It doesn't have impact on battery life, just my slight OCD suffers I'm using 2A wall charger, so it should provide plenty of current. Any ideas except completely draining the band? I would like to avoid it as it damaged the steps counter when I completely drained the batter on Mi Band 2 (had to completely discharge it again to fix it).

Of no help whatsoever, but mine is also stuck at 98%. Fully discharging the battery does NOT cure the problem, so I have left feedback on the Mi FIT app. Everyone needs to do the same

geoffphuket said:
Of no help whatsoever, but mine is also stuck at 98%. Fully discharging the battery does NOT cure the problem, so I have left feedback on the Mi FIT app. Everyone needs to do the same
Click to expand...
Click to collapse
Well, at least we know that trying the complete discharge doesn't help and that I'm not the only one with this problem. I sent the feedback, even though I doubt that it will be fixed. But maybe Xiaomi will surprise us..

_mysiak_ said:
Well, at least we know that trying the complete discharge doesn't help and that I'm not the only one with this problem. I sent the feedback, even though I doubt that it will be fixed. But maybe Xiaomi will surprise us..
Click to expand...
Click to collapse
No, if enough people have the same problem - and report it - something will be done. Most of the new features we have on the Mi Band 4, were added after they received feedback about the disastrous Mi Band 3

I just got one and have the same issue. Glad I'm not the only one! I'll submit a report to Xiaomi.

Funnily, I was able to charge to 100% two times recently. No idea what was different then, but my last charge was again only to 98%.. Go figure.

I have the same problem!!!
Hello friends!!! I'm from Brazil and recently my mi 4 band started giving the same problem. at first she only carried up to 99 and yesterday when I went to load noticed that she only went to 95 so this making me nervous, because it only makes 7 months I am using this smartband not want to believe that her life is already beginning to come to an end in less than one year. Today I sent a report on the issue by mi fit as you indicated. now only remains to know if the problem is software or hardware. the good thing is that even with this inconvenience, I can use it for 13 business days until the next charging. never let it discharge completely and always carry it when it arrives in their 13 battery.

Same problem but mine is stuck at 99%
_mysiak_ said:
Since I received the band, I can't get past 98% when charging. Tried charging from 30%, 60%, putting it on charger several times when at 98%, but I've never seen 100%. It doesn't have impact on battery life, just my slight OCD suffers I'm using 2A wall charger, so it should provide plenty of current. Any ideas except completely draining the band? I would like to avoid it as it damaged the steps counter when I completely drained the batter on Mi Band 2 (had to completely discharge it again to fix it).
Click to expand...
Click to collapse
Mine gets stuck at 99%

there was a firmware update in 22/2/2020 did it fix the problem for you ??

Mine is also stuck at 98%. I was able to charge it up the first time to 100% but then it started to go only to 98... Well I guess it's better than to charge only to 50% :silly:

I notice the same thing when I use my external charger. If I connect it to my laptop or directly via wall plug, it gets a full 100 charge. Might want to check that!

Failed to load into a USB 3.0 port
oroboros74 said:
I notice the same thing when I use my external charger. If I connect it to my laptop or directly via wall plug, it gets a full 100 charge. Might want to check that!
Click to expand...
Click to collapse
Good evening!!! I connected my Mi Band 4 to the USB 3.0 port on my PC. She had 12% battery power and I left it there charging for almost 3 hours and when I went to see it it had only charged up to 98%. Can you only charge it on USB 2.0 ports? How many hours do you leave your smartband charging on your notebook's USB port?

oroboros74 said:
I notice the same thing when I use my external charger. If I connect it to my laptop or directly via wall plug, it gets a full 100 charge. Might want to check that!
Click to expand...
Click to collapse
No difference in my case, I tried several chargers (500mA, 1A, 2A) or USB ports (v2, v3). It stayed stuck at 98%. Every now and then it charges to 100%, but it's totally random, most of the times I can't get past 98%.

LeoWalk said:
Good evening!!! I connected my Mi Band 4 to the USB 3.0 port on my PC. She had 12% battery power and I left it there charging for almost 3 hours and when I went to see it it had only charged up to 98%. Can you only charge it on USB 2.0 ports? How many hours do you leave your smartband charging on your notebook's USB port?
Click to expand...
Click to collapse
I'm not quite sure, but definitely much less than 3 hours! Sorry I can't be more of help.

I have the same problem. So there is no solution at moment

I managed to make the Mi Band 4 load up to 100%
oroboros74 said:
I'm not quite sure, but definitely much less than 3 hours! Sorry I can't be more of help.
Click to expand...
Click to collapse
Good night!!! I bought a Mi band 5 and in that, I decided to resell my Mi band 4. I formatted it and put it to charge before storing it in the box and to my surprise, it charged up to 100% and even vibrated when it reached the maximum charge limit .

LeoWalk said:
I managed to make the Mi Band 4 load up to 100%
Good night!!! I bought a Mi band 5 and in that, I decided to resell my Mi band 4. I formatted it and put it to charge before storing it in the box and to my surprise, it charged up to 100% and even vibrated when it reached the maximum charge limit .
Click to expand...
Click to collapse
how format a mi band?

LeoWalk said:
I managed to make the Mi Band 4 load up to 100%
Good night!!! I bought a Mi band 5 and in that, I decided to resell my Mi band 4. I formatted it and put it to charge before storing it in the box and to my surprise, it charged up to 100% and even vibrated when it reached the maximum charge limit .
Click to expand...
Click to collapse
Solved issue with 99% charge and drop to 84-5% after couple minutes with your guide. Thanks.
Formated Redmi Band 4, put for charging with original USB cable charger and original Xiaomi charger, 5V-2A, 10W for Redmi 4X mobil phone. Worked, charged to 100% and vibrated when reached 100%. I had this issue from 2020 and came with last update.

Battery hold from 11% to 0%

Hi all,
occasionally I see my 7 months old Pixel 3a XL can't hold battery power from 11% down. Switches off very fast, abnormally fast. Then if I power it and start it then keeps on restarting until battery level is higher than 5-6%
I use the original charger only. Sometimes it appears, some it does not and I can see it discharges as expected.
I try to keep my battery within 40-100% full and discharge it very rarely to 0%.
Anyone facing those abnormalities? Can't think of connected events - updates, etc ....
Cheers
p.s. after last night happening again, charged the phone from 0% to 86% (phone was off during charge), turned on on 86% and left over night on the shelf. Usually drains 2-3%, this morning it dropped from 86% to 62%. All connections off, nothing unusual shown in the battery usage stats...

TodNex said:
Hi all,
occasionally I see my 7 months old Pixel 3a XL can't hold battery power from 11% down. Switches off very fast, abnormally fast. Then if I power it and start it then keeps on restarting until battery level is higher than 5-6%
I use the original charger only. Sometimes it appears, some it does not and I can see it discharges as expected.
I try to keep my battery within 40-100% full and discharge it very rarely to 0%.
Anyone facing those abnormalities? Can't think of connected events - updates, etc ....
Cheers
p.s. after last night happening again, charged the phone from 0% to 86% (phone was off during charge), turned on on 86% and left over night on the shelf. Usually drains 2-3%, this morning it dropped from 86% to 62%. All connections off, nothing unusual shown in the battery usage stats...
Click to expand...
Click to collapse
That's pretty weird
My 3a xl (about the same age as yours) doesn't use more than 10% max when left overnight. Are you using AOD or anything?
Sent from my Pixel 3a XL using XDA Labs

@Skittles9823 nothing beside stock Android and apps that I've used forever. Strange is that it's occasional - also occassional is initial drain from 100% to 92%.
Maybe its time to flash it - nothing suspicious is shown in batt stats
I use the fast charger that came with it. Not sure how it affects battery life long term. I try to keep it 100% to 40% usually and not charge it if not necessary..

TodNex said:
@Skittles9823
I use the fast charger that came with it. Not sure how it affects battery life long term. I try to keep it 100% to 40% usually and not charge it if not necessary..
Click to expand...
Click to collapse
I think popular wisdom is that both fast charging and in particular charging to 100% are not kind to the battery's longivety. Divided opinion about the effect of discharging to low percentages. Personally I charge to between 70 and 80% unless I know I'm going to need more capacity. 3a XL has a bigish battery, which helps. I recharge most nights but only to 70-80%. End of day I usually end up between high 40's and low 30's charge.
I manually set all apps I don't actually need to run in background to 'restricted' background use.

I charge mine up to a 100% often, when using it heavy.. I never heard of charging a battery to 100% being bad for it, unless you believe everything that is told or should I say sold to you.. Sounds like a faulty battery. If still under the 1 yr usual warranty I would have it replaced. I have drained mine down to less than 20% and still never experience any issue that OP state.

doubledragon5 said:
I never heard of charging a battery to 100% being bad for it
Click to expand...
Click to collapse
Some research references in here
https://accubattery.zendesk.com/hc/en-us/articles/210224725-Charging-research-and-methodology
https://accubattery.zendesk.com/hc/...-Cycle-Life-Modeling-of-Lithium-Ion-Batteries
Also Apple have actually introduced a feature to stop/postpone 100% charging when the phone thinks it's not required. Would be good if we had similar/more control for Android.
https://support.apple.com/en-us/HT210512

WibblyW said:
Some research references in here
https://accubattery.zendesk.com/hc/en-us/articles/210224725-Charging-research-and-methodology
https://accubattery.zendesk.com/hc/...-Cycle-Life-Modeling-of-Lithium-Ion-Batteries
Also Apple have actually introduced a feature to stop/postpone 100% charging when the phone thinks it's not required. Would be good if we had similar/more control for Android.
https://support.apple.com/en-us/HT210512
Click to expand...
Click to collapse
I'm still not sold on the idea that charging a battery to 100% is bad.. But thanks for those links.

doubledragon5 said:
I'm still not sold on the idea that charging a battery to 100% is bad.. But thanks for those links.
Click to expand...
Click to collapse
It's actually true. Lithium Ion batters degrade over time, the speed of which, depends on the amount of battery cycles they go through (0-100% and vice versa). Others have done the research and the math and found that generally a 20% to 80% and vice versa charge seems to be the best for longevity.
Personally I charge to 100 but try to charge my phone when it gets to 20-30%.
Sent from my Pixel 3a XL using XDA Labs

doubledragon5 said:
I'm still not sold on the idea that charging a battery to 100% is bad.. But thanks for those links.
Click to expand...
Click to collapse
Evidence and research is there. Of course you don't have to believe it. It's your phone, your battery, your money

WibblyW said:
Evidence and research is there. Of course you don't have to believe it. It's your phone, your battery, your money
Click to expand...
Click to collapse
So very true my phone my money. In all my years of using cell phones, I think I have actually replaced a battery once because it went bad.

Thank you all for the links and the inputs!
One more symptom - when is very low like this morning - 1% and put it in charger - phone shuts off.
I will keep the battery in 40-80% for the future and limit the drain below 40%. I tried to charge it slow with USB - took me like 6-7 hours...
How long it takes you from zero to 100% with the stock charger - looks very fast to me - 0% to 67% in 35 mins
I personally tried to research and could not find what is worse for these batteries - number of cycles (obvious less when used below 40%) or the low capacity usage ?

TodNex said:
Thank you all for the links and the inputs!
One more symptom - when is very low like this morning - 1% and put it in charger - phone shuts off.
I will keep the battery in 40-80% for the future and limit the drain below 40%. I tried to charge it slow with USB - took me like 6-7 hours...
How long it takes you from zero to 100% with the stock charger - looks very fast to me - 0% to 67% in 35 mins
I personally tried to research and could not find what is worse for these batteries - number of cycles (obvious less when used below 40%) or the low capacity usage ?
Click to expand...
Click to collapse
The included charger is a fast charger, good for headlining how fast it charges, not so great for the battery. I just use a 'standard' (Anker) USB charger.
Jury's out on if deeper discharge is bad, but it's the number of complete cycles (0-100% counting as 1). So 40 - 80% is 0.4 of a full cycle, and you're not stressing the battery so much by taking it to 100%. Many folk here replace their phones frequently enough not to be bothered by all this - if they sell it when 20% of the battery capacity's gone, that's fine.

I've observed the behaviour and few things made me question myself...one time I can see 13% battery and palying Youtube just shutdown the phone. Put it into charger and started showing 4% as initial charge.
There was another time when using Viber video shutdown in 23% but can be overheat or software bug.
I try to keep it these days above 40% charge but still use the supplied charger till I buy new slower one.

TodNex said:
I've observed the behaviour and few things made me question myself...one time I can see 13% battery and palying Youtube just shutdown the phone. Put it into charger and started showing 4% as initial charge.
There was another time when using Viber video shutdown in 23% but can be overheat or software bug.
I try to keep it these days above 40% charge but still use the supplied charger till I buy new slower one.
Click to expand...
Click to collapse
The good news is that this phone seems to be pretty easy to repair and a battery replacement could very well be a good option for you, especially since you wouldn't be compromising any water resistance or anything

Galaxy watch 46mm keeps dying at half battery?

I'm not entirely sure what's going on. I go to bed and the battery shows around 62% left, I wake up and it's completely dead. The first 38% of the battery was totally normal, the night before it didn't use any more battery than normal. Has anyone else had somethin like this happen or know how I can fix it?

How long have you had the watch? Could be its stated showing symptoms of battery wear, battery health decreasing i.e capacity to hold charge that often results in calibration error.
It would say 100% charged, but if three battery health is down by 20%, in reality it would have charged up to net of that % really - happened twice with my phone, ended up replacing battery, confirmed with accubattery app
Sent from my Redmi Note 8 Pro using Tapatalk

sbsmbm said:
How long have you had the watch? Could be its stated showing symptoms of battery wear, battery health decreasing i.e capacity to hold charge that often results in calibration error.
It would say 100% charged, but if three battery health is down by 20%, in reality it would have charged up to net of that % really - happened twice with my phone, ended up replacing battery, confirmed with accubattery app
Sent from my Redmi Note 8 Pro using Tapatalk
Click to expand...
Click to collapse
I did get it used so I'm not sure how old it is, but it didn't wear down over time. It was all good, then one day I forgot to put it on for work and it stayed on the charger all day, then after that the battery kept dying around 60%.