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I have the 2750 mah battery in my phone. Bamf 1.5 with the new radio. 4 hours off the charger and it is at 65 percent. Any idea? All syncing is off, screen at 40%, no Widgets other than fancy widget on. This is nuts. I can't figure out what's going on.
Sent from my ADR6400L using XDA Premium App
Have you wiped battery stats?
I have the same issue. One day my phone goes 20+ hrs on a charge, the next day it drains 40% in 3 hrs, with no significant change in usage. I've swapped kernels, wiped battery stats, kill nonessential apps & services, and I still can't find the culprit. But my extra battery is in en route, so I'm not too concerned
No. Haven't wiped battery stats yet. I heard bad things about wiping the stats on the TB.
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I get the same thing every few days and it drives me crazy. You can instal a current widget and it'll show you what the draw is. Normall idle I'm at 38mA. But in these bouts of mystery drain it'll go up to 250-300mA for no reason. And this is with wifi/4G off too. But once I turn it on airplane mode the current goes back to normal until I take it off airplanel. So it's something to do with the regular cell radio...
Its ridiculous. Its stuff like this that kind of make me wish HTC held this back another few weeks.
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yeah i have this issue also. today Google Voice had partial waked my phone to 50% battery. i don't get it.
I have seen the same thing, anyone also notice the battery cooking when the drain is going on. I usually reboot the phone thinking an app is hung just banging on the system, sometimes it works other times not so much.
+1 i'm seeing this as well. when its happening the phone gets really hot. i hope this gets figured out.
chrisjm00 said:
I have the 2750 mah battery in my phone. Bamf 1.5 with the new radio. 4 hours off the charger and it is at 65 percent. Any idea? All syncing is off, screen at 40%, no Widgets other than fancy widget on. This is nuts. I can't figure out what's going on.
Sent from my ADR6400L using XDA Premium App
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Click to collapse
I had this problem on the BAMF 1.5 ROM + kernel combination. I recently switched to Imoseyon lean kernel (http://forum.xda-developers.com/showthread.php?t=1021404) and now the battery life is amazing. I've been off the charger since about 12:33am (CST) and it is now 12:28pm (CST) and I'm at 52% with average use.
On battery calibration. I strongly recommend doing this if when you restart your phone you lose drastic percentages. I was losing 11% with a restart indicating that it wasn't reporting accurate battery status. I used the battery calibration tool which is on the market. Now here is the kicker that i learned from Droid Incredible days, you have to fully charge the battery. That does not mean wait till your phone reports 100% that means turn off the device and charge until the notification led turns green and start up the phone and let it charge to the light goes green again then calibrate. Then disconnect and use til completely dead without plugging it in AT ALL!! This has worked for me.
Hope this helps everyone.
i really hope this thread doesnt die since this is a real problem apparently quite a few people have....
I didn't read all the post but after flashing a radio you have to wait a couple days yoga week before the battery can recalibrate.
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Battery monitor is showing 1350mAh
Wondering if I have a bad battery or maybe that's how it's read? Shouldn't it read 1400 instead of 1350?
I have this problem too... Its because something is not letting the kernal throttle down. Check setcpu and you will see it stuck on the Max speed. The smartass gov is most suspect because it doesn't use profiles
It's just the way it is for now. For the last 2 days I've been getting horrible battery life. All of a sudden things changed today. Battery drain is between 30 & 38 every 60 seconds. 2 days straight of 250-300 drove me frigging crazy.
Thunderbolt - BAMF Remix 1.5
Yeah I have these random cases too. However a reboot fixes the issue. Besides faster than normal battery drain, you should notice higher battery temperature.
I believe it's an application issue, something that we can't tell yet.
Honestly I have high hopes for the TBolt down the road. When Evo first came out, we were experiencing similar problems too. Given time the devs were able to get them solved. This is why I prefer HTC and XDA.
I got great life today. Yesterday was terrible. I'm still getting the large drop in percentages on reboot, but battery life is draining slowly. Something I was wondering is if we lose 15 percent on a drop, does that mean the battery is actually 15 percent lower when I restart? So if my battery is at 60 percent in my task bar, is it actually 45 percent? And if that is the case, what happens when it drops down to 10 percent on my taskbar? In theory that would mean the battery had 0% life. Now the strange part of that is I'm still losing battery from 10% down to 0%, once it hits 0 it shuts off, however, if I restart the phone at 8 percent it won't reboot. So why will the phone stay running at 8% battery, but it will not boot back up after the restart. Its been a long day so sorry if I'm rambling or not making sense. But you know what I'm getting at.
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D3TH METAL said:
Wondering if I have a bad battery or maybe that's how it's read? Shouldn't it read 1400 instead of 1350?
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Just the way it is, the thunderbolt technically has a 1350 mAh stock battery.
I saw a thread on another site that says, if you recalibrate your battery once a month it will help... Full charge... Unplug.. reboot...3 times only has helped mine.... Now I Only loose 2-3% of battery per hr...
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RogerPodacter said:
Just the way it is, the thunderbolt technically has a 1350 mAh stock battery.
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oh ok. Thanks
Hey everyone, what are your battery temperatures during heavy usage? More specifically, while watching a movie, playing a game, or even surfing the web, where the phone can get unusually warm?
My battery temperature has reached as high as 47 degrees celsius. I am concerned considering if you take a look at your battery, there's a sign on it saying that it shouldn't go above 40 degrees celsius/104 degrees fahrenheit.
andonnguyen said:
Hey everyone, what are your battery temperatures during heavy usage? More specifically, while watching a movie, playing a game, or even surfing the web, where the phone can get unusually warm?
My battery temperature has reached as high as 47 degrees celsius. I am concerned considering if you take a look at your battery, there's a sign on it saying that it shouldn't go above 40 degrees celsius/104 degrees fahrenheit.
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my phone starts feeling hot at around 86 degrees F. i have a setcpu profile to underclock when the phone is about 85 degrees because i dont like the heat and i figure its not good for the battery to be so hot. before setcpu, i was at around 90 during heavy usage..
My battery temp range is usually between 30°-40°c. Rarely do I go above that temp range. If you are seeing higher temps, there maybe something wrong with your battery. It would be helpfull to know what the thermal limits are, in reguard to battery temps. My rule of thumb is anything over 40° may be approaching the danger zone. I woikd stop what im doing and let the phone cool off.
I got to 52c w teathering. Now i keep it near my window when i do dat.
G2x
mine reached 108F 43C with just the screen on doing nothing else when it's charging. whole top half (back and front) of the phone gets really warm. is that normal?
Set up wifi tether, plug the phone into the wall charger, start downloading on your pc, and watch those numbers fly!!!
The first day I had my phone I did this and I heard a weird beep noise. When I looked at the phone, it had a warning message on it regarding battery temp.
I don't know the temperature it was at though.
mine is at 109 degrees right now and im just downloading stuff off of the charger.
My battery temp is usually around 35-40°, and I am pretty sure it has not gone above that. I don't try to kill the phone, though. If I am downloading a bunch of stuff, that is when it is usually the hottest.
Hey guys, so last winter I had no issues, snowboarding and taking the phone out, it was cold but battery was good. I noticed the past month or 2, now I noticed when battery drops to about 40% it drops fast! And when it dies if I plug it in for a short time it'll bump up to say 30% fast and discharge slower. I ran the battery discharge app, it drained down fast to about 2% then slowed, stayed at 1% for about 18 mins in the app before the phone finally shut off... , when it gets even a bit. Cold, say i left it in a 5 degrees celcuius location for 15 mins, it'll die. I thought huh? Plug it in for 5 mins and bam 68% percent. Today I was out snowmobiling, about - 2c or about 26f? The first half the ride it was ok, airplane mode on it had 85%, then get back to the vehicle and look at it, it was off, try and turn it on, it showed 0% and shut off. Let warm up and bam back to 80%....
What's going on? I think a battery mis calibration? It's bizarre and I've Googled but havent found a fix. Thanks!
Well, I'm thinking a few things:
1. Batteries hate the cold, and can be very sensitive to temp changes/certain temps where they really drop off efficiency. Age and cold can certainly add to their stressed unreliability.
2. If your battery is doing well in more normal temps, drops to say 40%, and then drops fast, followed by a recharge to 30%,where it discharges slower, maybe because the charging heated it a bit... ? So it's performing a tad better ?
3. Seems less possible that there is a short, but could be a temp sensitive short. I have seen those in electronics and cars, though the initial description has the feel of a battery going south.
If it remains stable to 40% and higher, and either the 40% lower threshold or temp get's it, perhaps changing out the battery would be a safe bet.
Thanks for the reply. I got reading a theory that as the battery ages, internal resistance goes up and when it gets cold it really shows, but who knows. My. Best bet I think is just to replace the battery.
I went skiing yesterday and charged my phone in the cold with a battery bank to 80% cap since its rooted. I went to go warm up and checked my phone after it warmed up from the cold and it was at 97%. I wish i had the thought to screenshot, i thought it was something that i would have found a post on the internet by now and never bothered, nothing about it on the internet.
I have a gopro i ski with also and lithium ion batteries suck in the cold, they dont produce a strong charge and can seem dead if temps get too low. warm them up a bit and then they are alive again producing charge since the internals are at optimal temps. I frequently rotate a couple of batteries after they freeze. My theory is that my phone was cold, the battery was producing charge but a weak one in the cold so when the phone thought it was at 80% it really was a weak 100 charge but when the phone warmed up, since it wasnt charging and whatever stops it from charging beyond 80 couldnt stop it because there was no current to stop and it reported its true percentage. I'm positive I saw it at 97 and i've never done any fixes or mods to change the 80 problem so Im going to try and reproduce it again.
Extreme cold (or hot) temperatures reduce the charge capacity of batteries. What you saw is the effect of this. Once your phone warmed up, the capacity of the battery increased. FWIW: this is also a significant issue for electric cars in winter climates...
Apparently, it is advisable to reduce current if charging lithium ion at colder temperatures above freezing (linked below), which seems somewhat surprising.
http://batteryuniversity.com/learn/article/charging_at_high_and_low_temperatures
Quote:
"Li ion can be fast charged from 5°C to 45°C (41 to 113°F). Below 5°C, the charge current should be reduced, and no charging is permitted at freezing temperatures because of the reduced diffusion rates on the anode. During charge, the internal cell resistance causes a slight temperature rise that compensates for some of the cold. The internal resistance of all batteries rises when cold, prolonging charge times noticeably."
Hi all! My Pixel 2 charges fast(~2700mA) up to first ~20%, then the current changes to 1370mA till almost to 90%, then slows a bit till the 100%. I have used Ampere to check the charging speed. I expected the phone to charge to at least 50% at a fast rate, then slow down a bit.
I recently acquired the device and it had May patch, but then after setting the device up, it prompted me for June patch and I installed it. Don't know if the new update could be the problem.
The phone will take battery temperature into account as well. Do you have a way to monitor that and correlate it with where the current switch points are?
Sent from my Pixel 2 using Tapatalk
DurhamHusker said:
The phone will take battery temperature into account as well. Do you have a way to monitor that and correlate it with where the current switch points are?
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I charge my phone early in the morning where it was not used all night. No battery drain apps at all. It just charges from almost 0 to 20 percent really fast, but then slows to a steady 1370 mA.
What I mean is ... Try charging from a different start point.
By the time it's charged at 2.7 amps to go from 0 to 20 it might be getting warm. You might try charging when it's at 20 and cool and see what happens. Or stop at 20 and let it cool down before going any further and see what happens.
Sent from my Pixel 2 using Tapatalk
DurhamHusker said:
What I mean is ... Try charging from a different start point.
By the time it's charged at 2.7 amps to go from 0 to 20 it might be getting warm. You might try charging when it's at 20 and cool and see what happens. Or stop at 20 and let it cool down before going any further and see what happens.
Sent from my Pixel 2 using Tapatalk
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Oh, I see now. Good point. Will try it!
Charkatak said:
Oh, I see now. Good point. Will try it!
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Click to collapse
DurhamHusker said:
What I mean is ... Try charging from a different start point.
By the time it's charged at 2.7 amps to go from 0 to 20 it might be getting warm. You might try charging when it's at 20 and cool and see what happens. Or stop at 20 and let it cool down before going any further and see what happens.
Sent from my Pixel 2 using Tapatalk
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So I did some testing and here is what I see:
Phone starts to charge at a good 2700mA rate for ~ a minute, then slows down to 1370mA. It doesn't really matter if phone has 5% of battery before I start charging or 20% or 40%, the charging pattern is the same. At start the battery temperature is ~32 C and when it charges at 2700 for that first minute or so, the temp rises to ~36 C, then phone drops the charging rate to 1370. Phone is pretty much room temperature and not hot or anything like that. I have 2 Google chargers; One is from original Pixel and the other is from Pixel 2 box. Both do the same thing and charge at the same rate.
There are no abnormal app activity or any battery drain. I am using Ampere app to check mA. Did anyone come across this?
It appears you've discovered the magic battery temperature cutoff that HTC has selected for the Pixel 2 ... and that seems to be around 35 or 36 degrees.
For every 10 C rise in temperature, battery degradation doubles by almost every measurable metric. It doesn't surprise me that at around 35 C your phone appears to limit the charge current ... seemingly to avoid making the battery any hotter. Taking the temperature higher for the charge cycle (or for any other reason) will degrade the battery over time. Deep discharges toward zero also reduce the life of a battery. (Keeping it at 50% or higher is recommended for lithium-ion rechargeable batteries.)
If you can cool the phone down to 25 C before starting to charge, I'd be willing to bet that it will charge at the higher rate for longer. Maybe put a small fan on the phone or set it in front of an A/C vent while it charges and see what happens then.
DurhamHusker said:
It appears you've discovered the magic battery temperature cutoff that HTC has selected for the Pixel 2 ... and that seems to be around 35 or 36 degrees.
For every 10 C rise in temperature, battery degradation doubles by almost every measurable metric. It doesn't surprise me that at around 35 C your phone appears to limit the charge current ... seemingly to avoid making the battery any hotter. Taking the temperature higher for the charge cycle (or for any other reason) will degrade the battery over time. Deep discharges toward zero also reduce the life of a battery. (Keeping it at 50% or higher is recommended for lithium-ion rechargeable batteries.)
If you can cool the phone down to 25 C before starting to charge, I'd be willing to bet that it will charge at the higher rate for longer. Maybe put a small fan on the phone or set it in front of an A/C vent while it charges and see what happens then.
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That is interesting as I have had different phones which got even warmer than Pixel 2, but still charged at a good rate. I do know that after 80% of charge of so, the charge rate does go down, which isn't a surprise to me. I just picked up my phone, after it was sitting idle for few hours and see that battery/phone temp is 25 C. I will make sure to start charging phone at a low temperature and see if it will keep the fast charge rate longer.
What you mentioned about the "keeping battery at 50% or so). Did you mean that when battery goes down to 50 or so %, charge it? I usually run battery until about 30 or so % before charging it.
Charkatak said:
That is interesting as I have had different phones which got even warmer than Pixel 2, but still charged at a good rate. I do know that after 80% of charge of so, the charge rate does go down, which isn't a surprise to me. I just picked up my phone, after it was sitting idle for few hours and see that battery/phone temp is 25 C. I will make sure to start charging phone at a low temperature and see if it will keep the fast charge rate longer.
What you mentioned about the "keeping battery at 50% or so). Did you mean that when battery goes down to 50 or so %, charge it? I usually run battery until about 30 or so % before charging it.
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Yes, charging it when it gets to around 50%, based on a number of studies, seems to be the way to go.
Deep discharges and hot temperatures are enemies of battery life for today's lithium-ion cells.
DurhamHusker said:
Yes, charging it when it gets to around 50%, based on a number of studies, seems to be the way to go.
Deep discharges and hot temperatures are enemies of battery life for today's lithium-ion cells.
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I have tried just now to start charging the phone when it is 23 C, but still get the same result. Could it be the June security patch?
Update: So the phone charged by rate of 1370mA from 22% to 100% in 1h 25m. So going from 0 to 100% should take ~1h 45m? Can anyone confirm how long it takes to charge Pixel 2 using original charger?
DurhamHusker said:
Yes, charging it when it gets to around 50%, based on a number of studies, seems to be the way to go.
Deep discharges and hot temperatures are enemies of battery life for today's lithium-ion cells.
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Click to collapse
Go a reference to these studies?
This app vendor has seen a lot and isn't convinced discharging to low values has much material effect on battery service life. Charging to high levels does, however. Interesting read I think... with commentry on the often quoted Battery University pages. I agree that heat isn't good whatever.
https://accubattery.zendesk.com/hc/en-us/articles/210224725-Charging-research-and-methodology
https://accubattery.zendesk.com/hc/en-us/articles/212988989-About-the-Battery-University-article
WibblyW said:
Go a reference to these studies?
This app vendor has seen a lot and isn't convinced discharging to low values has much material effect on battery service life. Charging to high levels does, however. Interesting read I think... with commentry on the often quoted Battery University pages. I agree that heat isn't good whatever.
https://accubattery.zendesk.com/hc/en-us/articles/210224725-Charging-research-and-methodology
https://accubattery.zendesk.com/hc/en-us/articles/212988989-About-the-Battery-University-article
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I can't point to anything peer reviewed or funded by the NSF ... so maybe 'studies' is the wrong word.
I've seen the Battery University articles and they've seemed believable to me. It's possible they're flawed. I've also seen articles from these guys - https://www.mpoweruk.com/life.htm ... and other tech writers who corroborate such claims. I've also seen the claims about the high level charging you're pointing to and some who suggest you should keep your battery between 50% and 85% all the time to get the most out of it.