Database Info

[INFO] *UPDATED -17 June 09* Battery life problems? Stop here!

This is a "Quick guide" to your battery - APPLIES TO Li-ion BATTERIES ONLY! (simplified version of an older thread http://forum.xda-developers.com/showthread.php?p=3834773#post3834773 )
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This info doesn't come from me but from 2 (I believe trustful) sources:
Isidor Buchmann,CEO of Cadex Electronics Inc., in Vancouver BC, award winning author of many articles and books on batteries,has studied about rechargeable batteries for 2 decades
Fran Hoffart, Applications Engineer, Linear Technology, Milpitas, California
Original web sites:
http://www.batteryuniversity.com/partone.htm
http://www.buchmann.ca/faq.asp
http://powerelectronics.com/portabl..._ics/proper_care_extends-li-ion-battery-0425/
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Charging tips
partial-discharge cycles can greatly increase cycle life, and charging to less than 100% capacity can increase battery life even further
after a full charge, a Li-ion battery will typically lose about 5% capacity in the first 24 hours, then approximately 3% per month because of self-discharge and an additional 3% per month if the battery pack has pack-protection circuitry
no need to charge for 5+ hours for the first time (priming), this doesn't work for li-ion chemistry
use ONLY ORIGINAL or HTC CERTIFIED chargers and batteries (they have extremely important function of cutting off
the current when charging is at 100% * )
battery cannot be reconditioned by over-charging - avoid higher than 4,2V current (which might boost capacity but shorten cycle life)
no need to worry about memory effect with "unscheduled" charging
avoid soft reseting your phone while charging
allow several full charges after doing hard reset to get accurate reading
try to keep battery stress as low as possible when charging (sure shot is to charge the phone when turned off)
a deliberate full discharge and recharge every 30 charges corrects "wrong reading" phenomena in most cases, if ignored, the battery gauge will become increasingly less accurate
using battery chargers that feature a reduced float voltage (4-4.1V) can increase battery life when used to charge a 4.2V Li-ion battery
Discharging tips
full discharge cycles (down to 2.5 V or 3 V, depending on chemistry) should be avoided if possible (except for above mentioned case of recalibrating device)
using only 20% or 30% of the battery capacity before recharging will extend cycle life considerably. As a general rule, 5 to 10 shallow discharge cycles are equal to one full discharge cycle
avoid frequent full discharges, very deep discharges will quickly, permanently damage a Li-ion battery
avoid high-stress discharging, slower discharge=better battery life
discharge level doubles with every 10°C (18°F) of increased enviromental temperature
Usage tips
avoid extreme load conditions (applications using a lot of energy)
avoid keeping a fully charged battery at high temperatures
battery stored for a year or more will start "aging" - irreversible
capacity lowering
maintaining a Li-ion battery in a fully charged condition will shorten its lifetime
store batteries charged at 40%
replace battery if original level drops bellow 80%, battery will lose about 10% of useful capacity each year (whether used or not)
* Selecting a charger that uses minimum charge-current termination (C/10 or C/x) can also extend battery life by not charging to 100% capacity. For example, ending a charge cycle when the current drops to C/5 is similar to reducing the float voltage to 4.1 V (see fig.3 bellow). In both instances, the battery is only charged to approximately 85% of capacity, which is an important factor in battery life. The letter “C” is a battery term used to indicate the battery manufacturers stated battery discharge capacity, measured in milliamp-hours. For example, a 2000-mAhr rated battery can supply a 2000-mA load for one hour before the cell voltage drops to its zero-capacity voltage.
Types of Li-ion batteries:
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Charging dependencies:

Thank you for a very informative post. Very good info here.

How can I full discharge my battery? Simply left my TP on until it dies? I am wondering that if it is wrong reading battery level, maybe it switch itself off when it reads 0% but maybe the real battery level is..10% or 15%, how can I be sure that the battery is full discharge? My TP is 3 month old, so, or my battery is damaged, or my TP is not accurate reading battery level; I was forgotting that sometimes I have done some soft reset while charging (but not in the past two weeks)

avoid soft reseting your phone while charging
Click to expand...
Click to collapse
Noticed something interesting the other day, here are the series of events that occurred:
- Battery died - phone turned off (is that considered a full discharge?)
- plugged it in, and it started to charge. The lights on the pad began to pulsate.
- Sometime later I realized that the phone was off so I turned it on. Mind you the lights were still pulsating indicating that it was charging. After the Version # screen came up and just before the Windows Mobile screen comes up. The lights which was in the middle of a pulse, stopped, and began again from the start. Is that considered an interruption in charging?

This should be a sticky!
The main problem I've come across is an inaccurate battery meter. Quite a few people using RRE WM6.5 have reported battery issues, but I've noticed its the meter, not the actual battery.
I RARELY did a full discharge (and I've had my phone since it came out in November). So after flashing the ROM, I did a full discharge. It stayed on 20% for a long time, then it stayed at 7% for a long time, then it seemed like it was at 1% forever. The phone finally shut off. I did a full charge while the phone was off. Now the battery meter is MUCH more accurate.

I'm using RRE's and noticed the "meter" issue. Think I'll give your suggestion a try and let it die over the weekend and juice it back up.
mindfrost82 said:
This should be a sticky!
The main problem I've come across is an inaccurate battery meter. Quite a few people using RRE WM6.5 have reported battery issues, but I've noticed its the meter, not the actual battery.
I RARELY did a full discharge (and I've had my phone since it came out in November). So after flashing the ROM, I did a full discharge. It stayed on 20% for a long time, then it stayed at 7% for a long time, then it seemed like it was at 1% forever. The phone finally shut off. I did a full charge while the phone was off. Now the battery meter is MUCH more accurate.
Click to expand...
Click to collapse

p51d007 said:
I'm using RRE's and noticed the "meter" issue. Think I'll give your suggestion a try and let it die over the weekend and juice it back up.
Click to expand...
Click to collapse
My phone has been off the charger for about 8.5 hours now. I sent/received about 10 texts, and I've had about 10 emails pushed through Windows Live and my battery is at 92% now. All on Edge with a good signal. Not too bad for me.

Feedback
I just would like to ecourage people to leave their feedback, if they tried some of the tips from this thred. Just to see if they are relevant in "real" life.
THANK YOU ALL!!!!

Battery Life
While the Fuze doesn't get the greatest battery life, one thing I immediately noticed was the extension of life when I switched my email from checking every five minutes to once every hour.
Just saying.

mxgoldman said:
While the Fuze doesn't get the greatest battery life, one thing I immediately noticed was the extension of life when I switched my email from checking every five minutes to once every hour.
Just saying.
Click to expand...
Click to collapse
Every 5 minutes would cause a huge drain in battery. You would be better off pushing email to your phone than checking every 5 minutes. Once per hour isn't too bad unless you're getting lots of emails every hour.

This is great information...thanks for the tips...and yes, getting emails every five minutes SERIOUSLY drains the battery...i learned that the hard way

thesilentnight said:
This is great information...thanks for the tips...and yes, getting emails every five minutes SERIOUSLY drains the battery...i learned that the hard way
Click to expand...
Click to collapse
I noticed when I could watch my battery drain and the phone was burning hot.
It was also shocking when it had 100% charge when I went to bed and was dead when I woke up.

Same here
MX, I thought I was going mad (going m-m-m-m-mad, I say). Last night, I turned off S2U2 (a notable battery drainer) and my Pro was at 100% battery at around 11pm, woke at 7am to find that the battery was @ 5%! To my knowledge, nothing else was running - certainly no phonecalls or texts and no other actions. Only thing I noticed (because I had forgotten) was that the Bluetooth headset was still connected and switched on - surely this couldn't have killed the battery in 8 hours?

i get horrible battery life and i follow all of the "rules" is it really possible that active sync is the battery killer ?

I heve recently bought a new HTC Touch Pro. After just few weeks, battery's gone crazy. It doesn't want to recharge, even connected to charger for 16 hrs. I got the icon of charging, I can still do anything as usual despite the battery doesn't save any energy. Could it be some energy drain? I'd be grateful for help.
gmanfuzing: I think it depends on how much operational memory does the ActiveSync use. Try shutting it down.
edit: problem solved, gentlemen. It's a failure of my ac adapter. Sorry for making trouble.

There seems to be a bunch of battery questions around again so........bump.

my battery has gone to hell
im on sheps 6.5 with the newest att radio
i had my phone at 100 pct an hour and half ago and it has since dropped to 85 and ive sent literally one text

Battery Drain Problem - Day 1
I got my Raphael 5 days back and immediately installed few apps and did some tweaks (energy and performance) using PHM Reg, Diamond Config tools and suddenly the battery started draining like crazy. ( 45% ) in 4 hrs.
I did a hard reset, disabled TF3D, did some energy saving tweaks using Advanced Config.
Here are my readings...
8.30 am - 100%
9.30 am - 98% - 2% Just Standby ( No push mails or Data Connections )
10.30 am - 95% - 20 mins MP3 and 2 SMS
11.30 am - 90% - Did Absolutely Nothing except 4 checking the battery
12.30 pm - 90% - Did Absolutely Nothing except 4 checking the battery
1.30 pm - 86% - Disabled Battery Icon ( Soft Reset ) Installed Ariel Battery
and continuing I'll keep updating...
BTW is this reading normal??? Personally im not too pleased.
P.S.: Just want to know how can I know what version of ROM and Radio is currently there in my device

1st post updated
Just to let you know that 1st post was updated with some more info

rajith said:
I got my Raphael 5 days back and immediately installed few apps and did some tweaks (energy and performance) using PHM Reg, Diamond Config tools and suddenly the battery started draining like crazy. ( 45% ) in 4 hrs.
I did a hard reset, disabled TF3D, did some energy saving tweaks using Advanced Config.
Here are my readings...
8.30 am - 100%
9.30 am - 98% - 2% Just Standby ( No push mails or Data Connections )
10.30 am - 95% - 20 mins MP3 and 2 SMS
11.30 am - 90% - Did Absolutely Nothing except 4 checking the battery
12.30 pm - 90% - Did Absolutely Nothing except 4 checking the battery
1.30 pm - 86% - Disabled Battery Icon ( Soft Reset ) Installed Ariel Battery
and continuing I'll keep updating...
BTW is this reading normal??? Personally im not too pleased.
P.S.: Just want to know how can I know what version of ROM and Radio is currently there in my device
Click to expand...
Click to collapse
Settings-System-Device Info

Battery on brand new Google Pixel 2 XL

I got my Pixel yesterday and was very excited to get my hands on it after hearing about the amazing battery life from those in the shop and on online reviews. The battery life was the main thing that pulled me in over the Samsung Galaxy S8+, but I'm not sure it's all it was hyped up to be so far! Day one with the phone, it was at 100% charge when I left the house this morning, within 5 hours it was at 60% and within 6 it was at about 52%. I checked my battery usage, the only apps I'd used were Apple Music which took 16%, messenger which used 5%, and Facebook which used 2%. All tabs were closed after I'd finished with the app, also. After seeing this, I was really shocked as to why it has drained so fast, considering I was told with light - moderate use it should last all day easily. Is this the average battery drainage or could something be up? It's not the worst battery I've ever had, but certainly isn't the battery I was expecting given how much the people in the shop/in reviews I'd seen had praised it.

Emmiesxx said:
I got my Pixel yesterday and was very excited to get my hands on it after hearing about the amazing battery life from those in the shop and on online reviews. The battery life was the main thing that pulled me in over the Samsung Galaxy S8+, but I'm not sure it's all it was hyped up to be so far! Day one with the phone, it was at 100% charge when I left the house this morning, within 5 hours it was at 60% and within 6 it was at about 52%. I checked my battery usage, the only apps I'd used were Apple Music which took 16%, messenger which used 5%, and Facebook which used 2%. All tabs were closed after I'd finished with the app, also. After seeing this, I was really shocked as to why it has drained so fast, considering I was told with light - moderate use it should last all day easily. Is this the average battery drainage or could something be up? It's not the worst battery I've ever had, but certainly isn't the battery I was expecting given how much the people in the shop/in reviews I'd seen had praised it.
Click to expand...
Click to collapse
New phones or reset/cleared data/cache(rom flash, kernel etc.) need several days for the battery to calibrate. Give it some time to adjust, also could be settings or rogue app that is draining the battery. If it doesnt seem better you can use BBS(better battery stats) app or similar to see exactly what is going on

Just to clarify you're talking about a pixel XL 2, as your title suggests? Just a bit confused as you've written this in the pixel 2 (non XL) forum.
For what it's worth though, I had a pixel 2 XL before my current pixel 2 (I moved just because I wanted something slightly more bitesize). In terms of screen on time I would quite easily get 6.5-7.5 hours on the XL all on stock and it just seemed to keep on going. My pixel 2 is also awesome albeit doesn't last quite as long. I'm currently on 17% and I have 5.15hours of screen on time. I've also used over an hour of Spotify with streaming over Bluetooth with that - so it definitely is good. It's also early days as this phone is new!

@sstanton86:
Careful with that battery usage. The latest word I've seen from Cadex is to keep it between 40% and 90% (or a little less if you can) for longest life. And with a non-removable battery, that's probably what most of us want. (IOW, latest tests show that even if we give it more charging cycles, it lasts longer if we don't go too far up or much below half down. 17% might give you props, but it won't give you a great battery in 3 years.)

Rukbat said:
@sstanton86:
Careful with that battery usage. The latest word I've seen from Cadex is to keep it between 40% and 90% (or a little less if you can) for longest life. And with a non-removable battery, that's probably what most of us want. (IOW, latest tests show that even if we give it more charging cycles, it lasts longer if we don't go too far up or much below half down. 17% might give you props, but it won't give you a great battery in 3 years.)
Click to expand...
Click to collapse
Thanks, appreciate the tips - but bear in mind this was just the first few days of having the phone and it does typically represent my usage. If I charge once a day from around 10-30% to 100% of course it's naturally going to degrade. Bit by the 12 month mark, but likelihood is I'll have the pixel 3 then so it doesn't bother me too much!

One of the things that convinced me to bite the bullet was that the P2 will be supported until R (raspberry-something?), so I'll still be up to date almost 4 years from now. (I don't even have a fingerprint reader on my current - and flagship - phone, but by 2020, I might just be ready for the Pixel 4 or 5.)
(And to think - I used to be a dealer walking around with 4 phones on my belt [we sold 4 carriers] and I'd think nothing of grabbing a new phone as soon as it came out and using it until something nicer came out - now I wait 4 years to upgrade.)

And with the 2 year warranty, the phone might be replaced
Sent from my Pixel 2 using XDA-Developers Legacy app

For a short battery life? Batteries are consumables (and you can kill a completely good battery in a month by treating it wrong), so even a battery that throws a dendrite most likely wouldn't be replaced (and that's not only a manufacturing defect, it's a defect in the technology itself).

Rukbat said:
@sstanton86:
Careful with that battery usage. The latest word I've seen from Cadex is to keep it between 40% and 90% (or a little less if you can) for longest life. And with a non-removable battery, that's probably what most of us want. (IOW, latest tests show that even if we give it more charging cycles, it lasts longer if we don't go too far up or much below half down. 17% might give you props, but it won't give you a great battery in 3 years.)
Click to expand...
Click to collapse
Do you have the reference for this? 40% - 90% is using 50% of the battery capacity. If that works for you, the chart below would suggest a range from 25% - 75% would give optimal number of cycles, unless I'm reading it wrong. It seems it's the higher % of charge state that stresses the battery most.
The chart below comes from here http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
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First, that's for a 1C charge - cellphones, even Quickcharge 3, don't get near that. (A 1C charge would be charging a 3000mAh battery at 3 Amps).
Second, I use Cadex' chart from the same article:
Table 2: Cycle life as a function of
depth of discharge. A partial discharge reduces stress and prolongs battery life, so does a partial charge. Elevated temperature and high currents also affect cycle life.
Note: 100% DoD is a full cycle; 10% is very brief. Cycling in mid-state-of-charge would have best longevity.
100% DoD ~300 / 600
80% DoD ~400 / 900
60% DoD ~600 / 1,500
40% DoD ~1,500 / 3,000
20% DoD ~1,500 / 9,000
10% DoD ~10,000 / 15,000
But it's recently been discovered (no, sorry, that link I don't have) that charging to 90% is better for longer life than charging to 100%.

Rukbat said:
@sstanton86:
Careful with that battery usage. The latest word I've seen from Cadex is to keep it between 40% and 90% (or a little less if you can) for longest life. And with a non-removable battery, that's probably what most of us want. (IOW, latest tests show that even if we give it more charging cycles, it lasts longer if we don't go too far up or much below half down. 17% might give you props, but it won't give you a great battery in 3 years.)
Click to expand...
Click to collapse
Rukbat said:
First, that's for a 1C charge - cellphones, even Quickcharge 3, don't get near that. (A 1C charge would be charging a 3000mAh battery at 3 Amps).
Second, I use Cadex' chart from the same article:
Table 2: Cycle life as a function of
depth of discharge. A partial discharge reduces stress and prolongs battery life, so does a partial charge. Elevated temperature and high currents also affect cycle life.
Note: 100% DoD is a full cycle; 10% is very brief. Cycling in mid-state-of-charge would have best longevity.
100% DoD ~300 / 600
80% DoD ~400 / 900
60% DoD ~600 / 1,500
40% DoD ~1,500 / 3,000
20% DoD ~1,500 / 9,000
10% DoD ~10,000 / 15,000
But it's recently been discovered (no, sorry, that link I don't have) that charging to 90% is better for longer life than charging to 100%.
Click to expand...
Click to collapse
You mentioned keeping between 40% and 90%, which is a 50% DOD. I think charging to less than 90% is much better so 70% -> 20% (or even 50% - > 0%) is much better than 90% -> 40%. Basically, what kills the battery is how full it is when you stop charging it.
I charge my phone up to about 70% unless I know I'm going to need the extra capacity.
Also see here
https://accubattery.zendesk.com/hc/en-us/articles/210224725-Charging-research-and-methodology
and here
https://accubattery.zendesk.com/hc/en-us/articles/212988989-About-the-Battery-University-article

I bought a Pixel 2 (non XL) 2 days ago, went straight for the March update and have only installed limited amount of apps. 25% brightness and 4G disabled (only using 3g) and no bluetooth.
Day 1: 100% charge overnight 68% battery left at around 17:00
Day 2 100% charge overnight 73% battery left right now Screen usage since full charge: 1h 31m
Does this seem normal? I was a bit surprised that I "only" had 68% left after the first day since I barely used the phone.
Or should I just let it calibrate and not think about it for a few days?

quuz said:
I bought a Pixel 2 (non XL) 2 days ago, went straight for the March update and have only installed limited amount of apps. 25% brightness and 4G disabled (only using 3g) and no bluetooth.
Day 1: 100% charge overnight 68% battery left at around 17:00
Day 2 100% charge overnight 73% battery left right now Screen usage since full charge: 1h 31m
Does this seem normal? I was a bit surprised that I "only" had 68% left after the first day since I barely used the phone.
Or should I just let it calibrate and not think about it for a few days?
Click to expand...
Click to collapse
Make a factory reset and wait 3 days to see if there are any changes. I usually lose around 3-4% overnight which sound reasonable.

Sony Battery (doesn't) Care (at all) (not) working after Pie Update :edited

Howdy...
Today I finally took the OTA to Pie.
And when I plugged my phone this evening I got a Notification about Sony Battery Care, which told me it'll charge my phone slowly.
Whyever it wants to charge until 03:40 in the morning, when my alarm clock is clearly set to 6:30 is a mystery to me.... But whatever Sony.
As it seems it was bugged on Oreo for quite a few people. Did it work for you guys?
I'll do a little testing and check how the charging progress is working now. Next time I'll try to discharge to 1% and charge fully over night. While measuring current and voltage externally. So we can compare to normal charging.
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Edit:
Well.... seems like it breaks really really easily.
After i got this Notification on the Lockscreen i got a call from a friend and unplugged the Phone.
When i was done, about 5 minutes Later i've replugged the phone but BatteryCare didn't want to start again.
Not only didn't it come back that time, i haven't seen the notification since then! Not even once. It simply vanished for good.
So does anyone of you ever use Battery Care? Even on a regular schedule?

Nice wallpaper

Edit:
Well.... seems like it breaks really really easily.
After i got this Notification on the Lockscreen i got a call from a friend and unplugged the Phone.
When i was done, about 5 minutes Later i've replugged the phone but BatteryCare didn't want to start again.
Not only didn't it come back that time, i haven't seen the notification since then! Not even once. It simply vanished for good.
So does anyone of you ever use Battery Care? Even on a regular schedule?

I never saw it.
Even on Oreo.
(I use it since May).
But I only charge it at day until 80% with accubattery.

Yeah battery care doesn't kick in again if you remove it from charge before it's finished. Although I had this with oreo also so I'm kind of used to it.

Who cares about that ? Not me

I don't use Sony battery care, I don't trust it.
But my charger is connected to a programmable wifi plug. It switches on at 5 a.m. Thus, when I wake up, my device is fully charged.
Of course, the aim is to keep the battery level above 90% as short as possible...

So we don't even have a single positive response of it working as advertised?^^
That's pretty sad for Sony.

If you plug and unplugged your device a few times each day or at different hours once a day it won't work.
For example, plug your device between 22h and 23h everyday, after a few days, battery care will turn on.
Envoyé de mon H8266 en utilisant Tapatalk

Well yeah.... sorry i plug my device between 21:00 and 02:00 every 2nd day but i always unplug at 6:50 so AI is too stupid to recognize this scheeme?

Haldi4803 said:
Well yeah.... sorry i plug my device between 21:00 and 02:00 every 2nd day but i always unplug at 6:50 so AI is too stupid to recognize this scheeme?
Click to expand...
Click to collapse
AI are generally somewhat stupid!

Battery care works flawlessly for my xz2.
Each and every night as soon as I connect the charger i get an annoying notification/message sound.
The notification is battery care, I would never get a notification sound before pie. I hope in the next update the sound is again muted.

Should I make my Battery Care learn my habit?
Hershchel Clogs said:
Any time you reverse the charge current is one cycle. How far down you discharge is your depth of discharge. So even if you drain the phone from 80% to 70% and plug it in and only charge it back up to 80%, that's one cycle. What you are saying would be true if you don't discharge the battery at all, similar to what Sony does with their battery care. You can charge lithium in short bursts but if you discharge between those charges then you are cycling your battery. So no, short incomplete charges aren't absolutely detrimental to your battery but will be considered in regards to your overall cycle life. For every 70 millivolt (roughly 10%) drop in voltage during a cycle, your overall cycle life is cut in half. Meaning you'll get twice as many cycles if you only drain your phone to 60% instead of 50%. To take full advantage of the chemistry, it is best to fully charge before discharging. You could expect 2500-3000 cycles at 10% depth of discharge, but only 500-700 or so at 50% depth of discharge before capacity is 70% of what it's rated. This is information I got from Cadex Labratories and deal with on a daily basis at work.
Click to expand...
Click to collapse
Should I follow this suggestion? Or keep small cycle of charges by using accubattery suggestion to plug off when I reach 80%?
Or should I just teach my Battery Care to learn my overnight charging habit and then make use of it when I can? (ie turning it off when I make small charge on the afternoon)
Xperia1 has the revamped battery care settings in which people can input their desired time for the feature to work.. I hope they update ours to work the same way....

Sp12er said:
Should I follow this suggestion? Or keep small cycle of charges by using accubattery suggestion to plug off when I reach 80%?
Or should I just teach my Battery Care to learn my overnight charging habit and then make use of it when I can? (ie turning it off when I make small charge on the afternoon)
Xperia1 has the revamped battery care settings in which people can input their desired time for the feature to work.. I hope they update ours to work the same way....
Click to expand...
Click to collapse
You can use the app "battery charge limit"
It just deactivates the charging at the desired hysteresis.
Keep in mind that the discharge is slightly higher with a connected USB device, because only the charging is deactivated, not the USB port.
(Needs root)
I charge every of the devices I maintain since years to 80% and the battery is still fine.

For me battery care works fine, i plug muy Xz2 at the same hour every night, so i dont have complains

I don't know when they added it, but you can finally set a custom Time
Fkn AI Learning didn't work at all...
And it seems to work pretty fine

Battery care not detected time in xperia xz1 G8342
My Xperia xz1 battery care not detected time. many times I am trying but it not working.

So I guess my battery is dying right? I get some very crap battery life now

I got this phone in January 2018. So, at this point it is almost 3 years old (just over 2 years and 9 months) and the battery life is pretty appalling now. I get perhaps half a day with a full charge. The main issue seems to be turning on WiFi/Data. As long as the WiFi is off which is usually in the night, the battery drain is relatively minimal. But the moment I turn WiFi on in the morning, the battery drains like crazy regardless of what I do with it. I usually just let it sit on my desk doing mostly nothing. I stay at home 24x7 nowadays due to the Covid-19 lockdown, and work from home. So no poor or uneven network signal. In terms of regular usage, it is a few minor phone calls via WiFi mostly, and a bit of solitaire games for an hour or so.
Take a look at the screenshots of the battery drain and life. Is there something I can do to enhance the battery life of this? Make it drain less with WiFi?
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There is also a battery replacement service here in London for a reasonable £60. I am wondering if I should do that or simply buy a new phone as this phone has anyway reached the end of life software support.

If it was me, I would be getting a new phone. Almost 3 years old. Time for a change. I've got the 4XL, but you could easily move to the new 4a, or 5 series. Good luck with your decision.
Sent from my Pixel 4 XL using Tapatalk

Sadly I am just not impressed with the new Pixels. The idea of having a weaker, less power hungry CPU and a bigger battery is nice, but the price is just unreasonably high. I wish it was cheaper especially given the competition. I have been searching for my perfect next phone and I think I should switch to something new soon as well. My top priority now is a decent price and a great battery.

The new P5 has a 4080ma LiPo battery. Haven't read much about the difference between LiOn and LiPo batteries. Not easy finding the perfect phone. Best of luck.
Sent from my Pixel 4 XL using Tapatalk

Here is a nice comparison between Li-ion and Li-Po batteries: https://www.androidauthority.com/lithium-ion-vs-lithium-polymer-whats-the-difference-27608/
Seems like Li-Po has low self discharge so it will hold a charge longer. But also has shorter life span, so I am guessing fewer charge cycles than even the current batteries. Interesting but unfortunate drawbacks. Oh, I wish for the day when we make a true battery breakthrough and have batteries with insane charge density in tiny packages and great life spans! Some day!

If I were you, I would get a battery replacement. No need to upgrade, especially when the price for the new pixel 5 is exceedingly high and disproportionate. I would then install a custom ROM so that you can get the latest security updates. That's what I'm going to do, I will wait for the next Pixel generation. If it's not any better, I may hold out longer. This is a fantastic phone that works ridiculously well despite the years, and we should avoid falling into needless consumerism. Just my two cents...
Enviado desde mi Pixel 2 mediante Tapatalk

I am considering that as well. I am not thrilled by the options I have at the moment. I like that the Pixel 2 is nice and small and it works well for my everyday use except the battery. And the battery is also not a big concern at the moment as I am mostly at home and can keep it charged regularly. And if I go out, I always take my battery pack with me to top up the phone if it goes too low. I am thinking I will continue with this for more time and even avoid a battery replacement, which will save me money and avoid any potential damage to the phone due to a poor job of replacing the battery.

What Android are you running, 11? Mine had horrible battery life, like 50% in 15 minutes because of an issue with a radio app on my phone

I am on Android 11. I just uninstalled a bunch of apps and the idle drain with WiFi on has reduced significantly. I will check how the battery life is now.

By chance, is your wifi and bluetooth scanning enabled in Location? That scanning can drain the battery.
Sent from my Pixel 4 XL using Tapatalk

WiFi scanning was on but not bluetooth. I will continue to track the battery life.

I got my Pixel 2 in November of 2017; I haven't noticed a significant decline in battery life, although it does seem that Android 11 is a lot more battery hungry, especially on standby.

This might be due to Android 11. The battery life is horrible. I also thought the same thing, bought a new battery and turns out it's a software issue.

Update: So I did end up putting in a new battery for my Pixel 2. It cost me £60 to do so here in London via iSmash, the official authorized repair partner. Given the retail price of the battery is around £10, the labour cost was £50 which is worth it as I would have damaged the phone if I tried it myself (I nearly did that with an old Droid many years ago).
So I got it repaired on 1 Dec. I have been testing the battery for a week and I do feel that the battery life has improved. I now have to charge only once a day or so after moderate use, kind of like what it was at the start. I do feel that perhaps the Android 11 update is still causing more drain than normal however, but still better than before.
I am using the AccuBattery app and before replacing the battery, the app approximated my battery health at around 1800-1900mAh compared to the design capacity of 2700mAh. Now, it is approximating it at around 2600mAh if I consider the latest charge cycle from 14% to 100% (+86% took about 2251mAh). So I am guessing that the battery replacement was well done and successful. I am also able to make my phone last longer even without turning on battery saver all the time. However, there is still some idle drain when I don't do much but have WiFi/data turned on. I am attaching screenshots. I wonder if this is software issue due to the latest Android 11.
So now, I have 2 questions:
Is there a better app than AccuBattery to get a sense of battery life/capacity? AccuBattery takes many charge cycles to get to a decent estimate.
Is there sometime I can do regarding the battery drain due to the latest Android 11 update? I believe lot of people have raised this complaint and I too noticed an increase in battery drain after the Android 11 update, despite the aging battery. And I seem to notice the same drain with the new battery now.

V0latyle said:
I got my Pixel 2 in November of 2017; I haven't noticed a significant decline in battery life, although it does seem that Android 11 is a lot more battery hungry, especially on standby.
Click to expand...
Click to collapse
Also, that is pretty amazing! You used your phone for 3 years and still did not notice significant decline in battery life!? Do you charge more carefully, such as only charge to 80% or 90% and not let it drain below 30-40% or something to extend the lifespan of the battery? Also, do you use the phone very sparingly, or is it not your daily driver? Do let us know what you do and how you managed to take care of the phone so well it lasted this long. That would be very useful information!

Meh I wouldn't have updated it.
Scope storage sucks.
If it's an LI:
Limit charges to 80% or at least stop at 90%
Don't regularly discharge below 20%
Li's like small frequent midrange charge cycles; 40-65% is ideal.
Avoid high temps especially with a fully charged cell; high cell voltage and high temperature degrade the cells much more rapidly.
Never charge a cold battery; 72-90°F is best.

litetaker said:
Also, that is pretty amazing! You used your phone for 3 years and still did not notice significant decline in battery life!? Do you charge more carefully, such as only charge to 80% or 90% and not let it drain below 30-40% or something to extend the lifespan of the battery? Also, do you use the phone very sparingly, or is it not your daily driver? Do let us know what you do and how you managed to take care of the phone so well it lasted this long. That would be very useful information!
Click to expand...
Click to collapse
Sorry for the late answer.
I am a heavy user, when I'm at work I generally have my phone on the charger. I plug it in all night too. Standby battery life is pretty good; Android 11 does seem to be more battery hungry, so if I don't use my phone at all, I might get 30 ish hours of life. But, with realistic use, it will probably last me around 8 hours, with the amount of video streaming I do.
I have never paid attention to charge cycles. Phone software handles that, and you'll find that most li-ion battery management only charges to about 80% of chemical capacity to extend the life of the battery. Tesla battery packs will last up to 500,000 miles, because the management software limits the usable charge to about 40% of the cells' actual capacity. Phone software does a similar thing, where 0% is actually about 40% of the battery's capacity, and 100% is actually about 80%. Your phone lives its whole life in that 40% of usable capacity. Maintaining a state of charge higher than 80%, or discharging below 40%, shortens battery life.
I'm not going to pretend that my battery still performs like new, and I wouldn't easily be able to determine that anyway - with the age of the battery and the software updates, it will never be the same as it was.
If I don't **** off at work, or I am not antisocial when we go over to friends' houses, it'll last quite a while, but given my heavy use I tend to keep it on a charger anyway.

blackhawk said:
Meh I wouldn't have updated it.
Scope storage sucks.
If it's an LI:
Limit charges to 80% or at least stop at 90%
Don't regularly discharge below 20%
Li's like small frequent midrange charge cycles; 40-65% is ideal.
Avoid high temps especially with a fully charged cell; high cell voltage and high temperature degrade the cells much more rapidly.
Never charge a cold battery; 72-90°F is best.
Click to expand...
Click to collapse
Don't have to worry about this. Firmware and software manages battery state of charge. Use it normally.
Also, the "proper" temperature for a lithium battery is between 40 and 80 degrees F. They will retain a better charge at room temperature because low temperature increases internal resistance, but you are not likely to damage anything. Charging, or maintaining a high state of charge at temperatures above 90 degrees shorten the life of the battery.

V0latyle said:
Don't have to worry about this. Firmware and software manages battery state of charge. Use it normally.
Also, the "proper" temperature for a lithium battery is between 40 and 80 degrees F. They will retain a better charge at room temperature because low temperature increases internal resistance, but you are not likely to damage anything. Charging, or maintaining a high state of charge at temperatures above 90 degrees shorten the life of the battery.
Click to expand...
Click to collapse
While you can use LI cells in low temps without harming them, charging them at low temps Li plating can occur which will permanently degrade them. The temp I saw stated was >80F.
Others stated standard temp for charging/testing Li's for longevity was a temp of 72F; I wouldn't go much below that when starting a charge.
&
Somewhere below 50-65F Samsung fast charging will revert to slow charging to protect the cell.
You won't find that in literature but you can observe it.

V0latyle said:
I have never paid attention to charge cycles. Phone software handles that, and you'll find that most li-ion battery management only charges to about 80% of chemical capacity to extend the life of the battery. Tesla battery packs will last up to 500,000 miles, because the management software limits the usable charge to about 40% of the cells' actual capacity. Phone software does a similar thing, where 0% is actually about 40% of the battery's capacity, and 100% is actually about 80%. Your phone lives its whole life in that 40% of usable capacity. Maintaining a state of charge higher than 80%, or discharging below 40%, shortens battery life.
Click to expand...
Click to collapse
I am not sure the software on our phones does anything quite as aggressive as you are suggesting, i.e. charge only till 80% and let you use it only till 40% of the physical capacity. Given the rated capacity of the internal batteries in phones, which can be easily identified via a teardown and how much charge is actually done based on measurements, unless the phone has a setting (some phones nowadays allow you to set an upper limit to the amount of charging to 80% or 90%) most phones including the Pixel 2 do NOT do any such kind of battery management. The Pixel 2 does let you charge till 100% of the battery's actual capacity and let's you drain it pretty much completely as well. So I am not sure what info made you believe that it does such battery management.
Tesla's etc. I can believe do such battery management as it is crucial for the longevity of a very expensive car.

How hot is to hot? (phone cpu+battery)

I just got a warning from my relatively new (10 day old phone) that it was closing down applications due to a battery temperature of 62.4C and a CPU tempereature of 59C is this normal?
I am not 100% sure which one it was complaining about, I believe the battery temp

What phone?!!

blackhawk said:
What phone?!!
Click to expand...
Click to collapse
Oppo x3 find pro

PaulGWebster said:
Oppo x3 find pro
Click to expand...
Click to collapse
It was not quite it's fault though ... I was doing some cooking and shoved it out of the way on a pyrex shelf that was well ... warmer than I expected
Just hope I have not caused it any serious
harm ... it all appears fine, though it had been sat on the shelf 6 hours while stew was being made >.>

144°F is hot for a cell phone battery, although technically it's close to some Li's max operating temperature range.
Shutdown temperature on Samsung phones for the battery is around 108F. I don't go over 103F battery temp and typically go screen off at a battery temperature 101F.
The cpu can run hotter.
Is the processor running a high load?
If so the big question is what's ramping up the cpu cycle usage? Find the problem app(s) and sort out the problem.
It sucking up internet bandwidth? Bloatware?
What's using the most battery?
Try in safe mode.
You're burning up the battery longevity. Limit the top charge to 80% for now until you resolve this issue. Keep screen brightness at 50% or lower.
Running at or near shutdown temperatures can cause permanent damage. It's especially hard on a fully charged Li battery.
Edit, you posted while I was replying. You may have knock some life out of the battery. I had one over temperature event on a fully charged Note 10+ battery that caused it to lose about 5% of its capacity. It failed a little more then a year latter.
3 things Li's don't like; full charges, high temperatures and charging below 72F.
Never attempt to charge if below 40F.

I agree. The only damage will be to the battery. The phone itself can withstand well over 100c without problems. The internals can take soldering which is 300c ish. The battery however, not too fond of anything above room temp.

at least a one off, won't sit it up there again!
Also seems to have been lucky it does not seem to have had aany affect

blackhawk said:
144°F is hot for a cell phone battery, although technically it's close to some Li's max operating temperature range.
Shutdown temperature on Samsung phones for the battery is around 108F. I don't go over 103F battery temp and typically go screen off at a battery temperature 101F.
The cpu can run hotter.
Is the processor running a high load?
If so the big question is what's ramping up the cpu cycle usage? Find the problem app(s) and sort out the problem.
It sucking up internet bandwidth? Bloatware?
What's using the most battery?
Try in safe mode.
You're burning up the battery longevity. Limit the top charge to 80% for now until you resolve this issue. Keep screen brightness at 50% or lower.
Running at or near shutdown temperatures can cause permanent damage. It's especially hard on a fully charged Li battery.
Edit, you posted while I was replying. You may have knock some life out of the battery. I had one over temperature event on a fully charged Note 10+ battery that caused it to lose about 5% of its capacity. It failed a little more then a year latter.
3 things Li's don't like; full charges, high temperatures and charging below 72F.
Never attempt to charge if below 40F.
Click to expand...
Click to collapse
Ah that is fien I only use C

I wonder if the phone will even tell me if it has lost capacity .... it seemed to charge to 100% this morning, but im not sure if that is 100% of what remains or 100% of its undamanged sate

PaulGWebster said:
Ah that is fien I only use C
Click to expand...
Click to collapse
The Fahrenheit system is better suited for everyday life. It uses whole numbers in the temperature ranges most used real life.
Lol, walking a klick is easier than a mile, mph is faster, and a °C is a lot hotter than a degree in F.
Consider your cpu heatsink broke in and well seated
You will see lost capacity as a decrease of SOT.
The % indicator doesn't see capacity per se but voltage level only.
Keep an eye open for cover bulging; any battery swelling is a failure.
Watch for shifts in charging time and erratic fast charging. As a battery degrades or fails these change, it can be slow or overnight.
After seeing one failure on my heavily used device I decided to just change out the battery every year or so. It's not worth destroying the display over or deal with the loss in capacity. Most batteries aren't that hard to replace once you know how. In a few phones though it's not pretty. The Note 10+ is rated as hard but in reality it's not if done correctly... so actually watch one being replaced in person if possible.

blackhawk said:
The Fahrenheit system is better suited for everyday life. It uses whole numbers in the temperature ranges most used real life.
Lol, walking a klick is easier than a mile, mph is faster, and a °C is a lot hotter than a degree in F.
Consider your cpu heatsink broke in and well seated
You will see lost capacity as a decrease of SOT.
The % indicator doesn't see capacity per se but voltage level only.
Keep an eye open for cover bulging; any battery swelling is a failure.
Watch for shifts in charging time and erratic fast charging. As a battery degrades or fails these change, it can be slow or overnight.
After seeing one failure on my heavily used device I decided to just change out the battery every year or so. It's not worth destroying the display over or deal with the loss in capacity. Most batteries aren't that hard to replace once you know how. In a few phones though it's not pretty. The Note 10+ is rated as hard but in reality it's not if done correctly... so actually watch one being replaced in person if possible.
Click to expand...
Click to collapse
*mumbles kelvin*
I am not sure I will be able to actually see battery swell ... the front of the case is glass, the back is metal and its IP 68 ...
I bet there is an app for actual battery condition out there though!
There certainly is for laptops etc, SOT? something of time .... my guess is surcharge over time?

PaulGWebster said:
*mumbles kelvin*
I am not sure I will be able to actually see battery swell ... the front of the case is glass, the back is metal and its IP 68 ...
I bet there is an app for actual battery condition out there though!
There certainly is for laptops etc, SOT? something of time .... my guess is surcharge over time?
Click to expand...
Click to collapse
It will either push up the display or rear cover. I missed that early warning on my Note 10+ because of the case, oops. I was very lucky it didn't damage the display.
When the battery reaches 80% of what its new capacity was, it's reached the end of its useful service life and is considered degraded. Degraded Li's are much more likely to fail. If it shorts internally it can make a hot mess of the phone. Degraded cells are more likely to form dendrites that puncture the anode/cathode insulation and cause a short. Cold charging can cause Li plating which permanently damages the cell capacity... avoid charging under 72F, although a minimum of 82F is a preferable start charge temperature
Accubattery's charge/discharge logging feature is very useful as is the handy battery temp reading. I firewall block it though.
Screen On Time, I use to find misbehaving apps and gauge the battery over time. My typical usage is 7-13%@hr. 7-8% browser, 10-12% watching vids.

hmmm a 15 minute charge put it at 87% charged

PaulGWebster said:
hmmm a 15 minute charge put it at 87% charged
Click to expand...
Click to collapse
I go by % per minute. On the N10+ when fast charging between 30-70% it runs at 2%@min.
On a bad battery it increases to 3%@min, or fast charging will fail to engage in spite of meeting % and temperature range requirements.
A failing battery will charge too quickly and/or erratically.
Accubattery makes it easy to overview the behavior.
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blackhawk said:
I go by % per minute. On the N10+ when fast charging between 30-70% it runs at 2%@min.
On a bad battery it increases to 3%@min, or fast charging will fail to engage in spite of meeting % and temperature range requirements.
A failing battery will charge too quickly and/or erratically.
Accubattery makes it easy to overview the behavior.
View attachment 5531093
Click to expand...
Click to collapse
Well ... appanrelt my oppo is now reporting 30% is the new 100%

PaulGWebster said:
Well ... appanrelt my oppo is now reporting 30% is the new 100%
Click to expand...
Click to collapse
What do you mean? It lost calibration or capacity?

blackhawk said:
What do you mean? It lost calibration or capacity?
Click to expand...
Click to collapse
It is meant to carry a Li-Po 4500 mAh, non-removable battery, the current rated charge at 100% is 1017mAh

PaulGWebster said:
It is meant to carry a Li-Po 4500 mAh, non-removable battery, the current rated charge at 100% is 1017mAh
Click to expand...
Click to collapse
Where is that coming from?
What's your typical SOT?

Every battery is losing capacity over the time, nobody can hinder this. But this can get slowed down if discharging / charging the battery is correctly done.