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Battery settings,

Can someone help me out here this is for an Orbit 2 less than 1 week old. I charged the device this morning so by 09:00 it was on full power. By 14:00 its down to 75%. Usage below:
10 minutes phone calls
I have my email set to retrieve from Yahoo every 15 minutes
On battery the screen is set to 50% - 75% brightness
Co-pilot has live function and traffic updates, but I presume that is only when its actually turned on and running Co-Pilot
What is going wrong?

Firstly, did you give it 3 charges of 16 hours plus? I didn't, and don't have as good a battery life of some others that did.
Also, have you got Windows Live connected and checking your hotmail constantly? That killed my battery.
Finally, I leave HSDPA switched off, as I find it chews juice without being THAT much faster; 3G is fast enough browsing and downloading for me.
Good luck, keep us posted.

I've got a HTC TyTN (hermes) and i get the same problem: my battery wears off in maximum 3 hours after i fully charge it. all the connections are turned off,except for the phone function. also, while it's charging, no matter if it's charging through the usb or the AC charger, the battery gets very hot. PLEASE can anyone help
(i have the black satin normal rom, with the 1.43.00.00 radio version installed)

I all so have battery questions. This devise was advertised as an 7 hour talk time on GSM. Compare to my T-Mobile wing witch was only 5 hour talk time.
I don't use phone a lot during day only 5-10 min phone calls and every 60 min e-mail check. And T-mobile Wing (p4350) was going for 3 days no charge no problem. And This I have to charge every day. At the end of the day i have only 60% And T-Mobile USA don't have 3G eat.
I don't get it this phone supposed have one of the best battery life out of HTC phones. And I did charge it wan i first got it for long time before i tern it on.

About chargin and discharge our phones, whe have to remember that we do not use NiCd/NiMh batteries any more.
I have some facts about Li-ion batteries!!!
Guidelines for prolonging Li-ion battery life!
Unlike Ni-Cd batteries, lithium-ion batteries should be charged early and often. However, if they are not used for a long time, they should be brought to a charge level of around 40% - 60%.
Lithium-ion batteries should not be frequently fully discharged and recharged ("deep-cycled") like Ni-Cd batteries, but this is necessary after about every 30th recharge to recalibrate any external electronic "fuel gauge" (e.g. State Of Charge meter). This prevents the fuel gauge from showing an incorrect battery charge.
Lithium-ion batteries should never be depleted to below their minimum voltage, 2.4v to 3.0v per cell.
Li-ion batteries should be kept cool. Ideally they are stored in a refrigerator. Aging will take its toll much faster at high temperatures. The high temperatures found in cars cause lithium-ion batteries to degrade rapidly.
According to one book,[35] lithium-ion batteries should not be frozen (most lithium-ion battery electrolytes freeze at approximately −40 °C; however, this is much colder than the lowest temperature reached by household freezers).
Li-ion batteries should be bought only when needed, because the aging process begins as soon as the battery is manufactured.[13]
When using a notebook computer running from fixed line power over extended periods, the battery should be removed, and stored in a cool place so that it is not affected by the heat produced by the computer.
/Krypto

BadTasteUK said:
Firstly, did you give it 3 charges of 16 hours plus? I didn't, and don't have as good a battery life of some others that did.
Also, have you got Windows Live connected and checking your hotmail constantly? That killed my battery.
Finally, I leave HSDPA switched off, as I find it chews juice without being THAT much faster; 3G is fast enough browsing and downloading for me.
Good luck, keep us posted.
Click to expand...
Click to collapse
16 hours?!?!?!!?

It's a highly debated point, but it seems some who have done the old "3 charges of 16 hours" have a longer lasting battery than certainly I do.
In fact the O2 shop I bought the phone from advised the same, although I didn't actually do it!
Who knows the real best thing to do, all I know is I only get a day out of it, with light to medium use and HSDPA turned off.

Personally, I'm a little speculative of the 16 hour charge times.
I'm not gonna try to be an expert here, but aren't Li-Ion charge circuits designed such that when the battery reaches capacity, the charge cycle is complete? Ie. There is no further trickle charge to the battery? In that case, the 16 hour charge is not doing any good.
But in any case, I myself get 2 days fairly easily with about 1.5-2 hours of phone calls in an Edge area.
I am a firm believer a big difference comes from using of Standby and your signal strength. I've noticed where I go ski'in there is a very weak signal and my battery life drops to 40% or less in one day. So I think this is one major characteristic that will vary between all of us and will dramatically affect the battery life test results.

DaRacerz, you are absolutly right!
No trickle charge is applied because the Li-ion is unable to absorb overcharge. Trickle charge could cause plating of metallic lithium, a condition that renders the cell unstable.
So charging for 16 hours won't do anything.

65% battery drain when phone completely off

So last night my phone was at around 75% before heading to sleep, I woke up this morning to find, after turning it on (it was completely off) that it was at 10%. I did do an update several days ago, but I'm worried as my battery has been iffy lately. So my question is, has anyonr else experienced this and had it as an isolated issue that they didn't have to deal with again, or should I be worried about my battery? I've never seen anyone report this issue on an S7 before.
XDA won't let me post an image or link until I make 10 posts, so I can't post the graph, sorry. It just shows a giant gap for when it was off, and the line starting significantly lower than where it startrd before the graph.
thanks in advance

Must have water damage on your mother board ..due to which battery drain occurs ..in night mine only drains 1%

danysonu said:
Must have water damage on your mother board ..due to which battery drain occurs ..in night mine only drains 1%
Click to expand...
Click to collapse
I don't think it's water damage as I very rarely bring this thing around water. Also, it didn't happen last night, so that's good.

Put it down to the phone not fully powering off, and instead getting stuck in a SoD (Sleep of Death), used to happen with the ASUS Transformer a lot, looks like it's powered off, but it's still running and you end up with a dead battery the next day

*Detection* said:
Put it down to the phone not fully powering off, and instead getting stuck in a SoD (Sleep of Death), used to happen with the ASUS Transformer a lot, looks like it's powered off, but it's still running and you end up with a dead battery the next day
Click to expand...
Click to collapse
Interesting, does battery data not at all record during that point, as the graph suggests?
I should mention I was able to turn it on like normal in the morning.

Lalam24 said:
Interesting, does battery data not at all record during that point, as the graph suggests?
I should mention I was able to turn it on like normal in the morning.
Click to expand...
Click to collapse
It didn't with the Transformer, for all intents and purposes it thought it was off but was stuck in limbo, I think the CPU gets hammered during that time too as the battery would not drain almost fully by just leaving it on idle overnight
Being able to turn it on normally is different, but I guess it's a different device, I had to hold the power button of the Transformer to shut it off completely before powering back on if it hadn't 100% drained the battery, but generally it had (Both batteries, dock and tablet)

*Detection* said:
It didn't with the Transformer, for all intents and purposes it thought it was off but was stuck in limbo, I think the CPU gets hammered during that time too as the battery would not drain almost fully by just leaving it on idle overnight
Being able to turn it on normally is different, but I guess it's a different device, I had to hold the power button of the Transformer to shut it off completely before powering back on if it hadn't 100% drained the battery, but generally it had (Both batteries, dock and tablet)
Click to expand...
Click to collapse
Do I have any way of finding out if this was the cause other than assuming?

Lalam24 said:
Do I have any way of finding out if this was the cause other than assuming?
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Click to collapse
None that I know, if it was still in that state a logcat might help but chances are it is not in any state that would be logging anything tbh
Other possibility is a bad battery, but seems strange it would happen when the phone was off, but I guess anything is possible if the hardware is faulty
The gap in the battery stats graph is normal when you turn the phone off, as the graph is showing time scales, you leave it off for 8 hours there will be an 8 hour time gap, happens with mine when I turn it off too

*Detection* said:
None that I know, if it was still in that state a logcat might help but chances are it is not in any state that would be logging anything tbh
Other possibility is a bad battery, but seems strange it would happen when the phone was off, but I guess anything is possible if the hardware is faulty
The gap in the battery stats graph is normal when you turn the phone off, as the graph is showing time scales, you leave it off for 8 hours there will be an 8 hour time gap, happens with mine when I turn it off too
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Click to collapse
I know the gap is normal, just the gap with the huge difference in percentage from each sidr is what I'm talking about.
Anyway thanks for the suggestion, still curious to see if this ever happened to anyone else and they just didn't report it.

Lalam24 said:
I know the gap is normal, just the gap with the huge difference in percentage from each sidr is what I'm talking about.
Anyway thanks for the suggestion, still curious to see if this ever happened to anyone else and they just didn't report it.
Click to expand...
Click to collapse
Yea the huge % drop is definitely not normal, even left turned on with all radios enabled wouldn't do that, screen being on the whole night would be about that sort of drain I'd say, you can get 9+ hours SoT if you don't use the phone and just leave it on doing nothing but as it was turned off I can only think bad battery or SoD
Hope you find the cause, or it was a one off and behaves from now on

*Detection* said:
Yea the huge % drop is definitely not normal, even left turned on with all radios enabled wouldn't do that, screen being on the whole night would be about that sort of drain I'd say, you can get 9+ hours SoT if you don't use the phone and just leave it on doing nothing but as it was turned off I can only think bad battery or SoD
Hope you find the cause, or it was a one off and behaves from now on
Click to expand...
Click to collapse
This isn't entirely on topic but why would the battery graph ever start at a point that isn't 100%? That happened to me today after turning it on in the morning, and the totals only add up to the amount used below 48%. Someone said it's from restarting or turning the phone on and off, but I thought that just showed a gap in the graph.
Sorry for the sort of irrelevant question, you seem to know what you're talking about and I see no point in starting another topic for the question.

Lalam24 said:
This isn't entirely on topic but why would the battery graph ever start at a point that isn't 100%? That happened to me today after turning it on in the morning, and the totals only add up to the amount used below 48%. Someone said it's from restarting or turning the phone on and off, but I thought that just showed a gap in the graph.
Sorry for the sort of irrelevant question, you seem to know what you're talking about and I see no point in starting another topic for the question.
Click to expand...
Click to collapse
The battery graph would only show 100% if the battery was 100% full when you powered it on, so basically the Y axis (vertical) shows battery full %, the X axis (horizontal) shows a time scale since last charge, which is why you get the gap when you have the phone off for a while
The app usage % is confusing, it doesn't always add up to the % that is missing from a fully charged battery, rather what % of the charge used since it started using the battery this session / charge, so if the phone has been off for a while with say a 50% charge, then powered on, you might see the app usage starting fresh with only a few % per app which won't add up to the missing 50%, and also if you partially charge the phone for arguments sake to 75% from 50%, then remove the charger, that can also reset the app usage % as it shows the usage since being on battery power only
That said, the above doesn't always ring true, I've just had my phone on charge for 30 mins, now at 76%, I rebooted the phone and removed the charger and the app usage stayed the same, not sure what circumstances are needed to reset the app usage % but I've seen it happen after partial / full charges, and also having the phone off for a period of time

*Detection* said:
The battery graph would only show 100% if the battery was 100% full when you powered it on, so basically the Y axis (vertical) shows battery full %, the X axis (horizontal) shows a time scale since last charge, which is why you get the gap when you have the phone off for a while
The app usage % is confusing, it doesn't always add up to the % that is missing from a fully charged battery, rather what % of the charge used since it started using the battery this session / charge, so if the phone has been off for a while with say a 50% charge, then powered on, you might see the app usage starting fresh with only a few % per app which won't add up to the missing 50%, and also if you partially charge the phone for arguments sake to 75% from 50%, then remove the charger, that can also reset the app usage % as it shows the usage since being on battery power only
That said, the above doesn't always ring true, I've just had my phone on charge for 30 mins, now at 76%, I rebooted the phone and removed the charger and the app usage stayed the same, not sure what circumstances are needed to reset the app usage % but I've seen it happen after partial / full charges, and also having the phone off for a period of time
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Click to collapse
I was about to say I didn't have this thing plugged in at all last night until I got to the end.
Either way the gaps in the graph suggest you can see it at 100% on the graph regardless of whether or not it has 100% when you turned it on. That's actually almost always what I see, or rather, up until last night I don't recall ever seeing the graph not start at 100%. Then again with the other battery issues I may just be noticing more now.
So to clarify, you've seen the graph start fresh, from a percentage other than 100, after not having charged it, correct?

Lalam24 said:
I was about to say I didn't have this thing plugged in at all last night until I got to the end.
Either way the gaps in the graph suggest you can see it at 100% on the graph regardless of whether or not it has 100% when you turned it on. That's actually almost always what I see, or rather, up until last night I don't recall ever seeing the graph not start at 100%. Then again with the other battery issues I may just be noticing more now.
So to clarify, you've seen the graph start fresh, from a percentage other than 100, after not having charged it, correct?
Click to expand...
Click to collapse
No not the graph, the app usage % under the graph resets after charging / powering off for a time
The battery level graph will remain at the level the battery is at no matter what I do with it
It doesn't start at 100% unless the battery is 100%, which is the way it should be as that right side axis is battery % level, wouldn't make sense to have it start at 100% if it was only 50% charged so not sure what's happening with yours

*Detection* said:
No not the graph, the app usage % under the graph resets after charging / powering off for a time
The battery level graph will remain at the level the battery is at no matter what I do with it
It doesn't start at 100% unless the battery is 100%, which is the way it should be as that right side axis is battery % level, wouldn't make sense to have it start at 100% if it was only 50% charged so not sure what's happening with yours
Click to expand...
Click to collapse
For me it's always once I charge it to 100% completely, that's the point the graph starts at and remains that way until I recharge it to 100% again. For example, another member of my family's s7 edge's graph, about a week ago, lasted for about 80 hours while only being charged to 100% once, those 80 hours ago. So it was put on the charger several times throughout but never reset the graph at those points. Then once it was charged to 100% again, it reset the graph. So I'm not saying it's suggesting I'm at 100% when I'm at 50%, but rather that it gives me usage history, on the graph, from the last 100% almost all of the time, and just shows gaps when I turn it off.
So that's why I was confused. What does your graph start at right now, out of curiosity?

Lalam24 said:
For me it's always once I charge it to 100% completely, that's the point the graph starts at and remains that way until I recharge it to 100% again. For example, another member of my family's s7 edge's graph, about a week ago, lasted for about 80 hours while only being charged to 100% once, those 80 hours ago. So it was put on the charger several times throughout but never reset the graph at those points. Then once it was charged to 100% again, it reset the graph. So I'm not saying it's suggesting I'm at 100% when I'm at 50%, but rather that it gives me usage history, on the graph, from the last 100% almost all of the time, and just shows gaps when I turn it off.
So that's why I was confused. What does your graph start at right now, out of curiosity?
Click to expand...
Click to collapse
Starts at 100% because that's when I took it off charge last night
Yea I think I know what you mean, if you don't fully charge it'll continue the graph from whatever charge level it is at once you remove the charger, happens here too if I don't charge for long, but lets say from 10% > 70% and remove the charger and it'll reset the app usage % but the graph level will remain at whatever % the battery is unless I power off for a length of time, then it'll act like a new fresh charge as seen here (No charging ramp before the 100% level 12 hours ago)
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*Detection* said:
Starts at 100% because that's when I took it off charge last night
Yea I think I know what you mean, if you don't fully charge it'll continue the graph from whatever charge level it is at once you remove the charger, happens here too if I don't charge for long, but lets say from 10% > 70% and remove the charger and it'll reset the app usage % but the graph level will remain at whatever % the battery is unless I power off for a length of time, then it'll act like a new fresh charge as seen here (No charging ramp before the 100% level 12 hours ago)
Click to expand...
Click to collapse
The graph seems to randomly reset on its own sometimes when you restart/turn off and on the device every now and then, no charger needed, which is what happened to me the other night, and what apparently occassionally happens to someone on androidcentral. I guess my real question is what's the point of the set up, and is there a consistency to it we're not seeing?

*Detection* said:
Starts at 100% because that's when I took it off charge last night
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Click to collapse
Anyway, thank you for all of the help and answering all of my probably useless question

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.

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.

Question Battery protection experience

To those that have use the phone for a year what is your battery health percentage without battery protection and with battery protection, im just trying to see if using the battery protection is worth it or not

There is no question concerning battery protection, if you use a device with a lithium ion battery and only use it between 30 and 80 % this will greatly extend the useful life of the battery. Using a smartplug and software to control the charger plugged into it, I have a five year old Pixel phone with a battery health percengage above 85% that’s still working fine.
I only wish that Samsung’s battery protection option was 80% instead of 85%, which would better enhance battery life.

Almost a year with the phone (10 months), always used the battery protection. Stock One UI 5.1, Snapdragon version.
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1. Never used battery protection feature because I always charge my phone to 100% and keep it connected for another 5 minutes or so.
2. I don't use Adaptive Battery feature either because I haven't seen any benefits from it.
3. Lots of theories on keeping the phone battery between some range. I don't follow it because benefits from such practices are insignificant during the expected ownership life of the phone (about 5 years on average).

I turned off battery protection 1 year ago and never looked back. Today, at 100% charge it says I have 1d19h of charge remaining. I charge my phone to 100% every night while I sleep. I see no difference in my battery performance at all.

evertroy said:
I turned off battery protection 1 year ago and never looked back. Today, at 100% charge it says I have 1d19h of charge remaining. I charge my phone to 100% every night while I sleep. I see no difference in my battery performance at all.
Click to expand...
Click to collapse
As I previously stated, self implemented battery protection on several phones I have owned made a huge difference for me. Charging to 100% every night left me with a very noticeable decrease in battery capacity within a year and a half or so. Maintaining the battery between 30 - 80% produces a night and day difference in battery endurance. I still own a Pixel 2XL that has never been charged to 100% and the battery capacity is around 85% and the phone still works great.

According to Accu Battery my S22U was at 99% after 1 year of charging to 85%. I never used wireless fast charging and kept the charge between 35 - 85%.
Everyone has an opinion on this. I have no problem getting 2 days of use charging to 85% so why charge to 100%.

neilth said:
There is no question concerning battery protection, if you use a device with a lithium ion battery and only use it between 30 and 80 % this will greatly extend the useful life of the battery. Using a smartplug and software to control the charger plugged into it, I have a five year old Pixel phone with a battery health percengage above 85% that’s still working fine.
I only wish that Samsung’s battery protection option was 80% instead of 85%, which would better enhance battery life.
Click to expand...
Click to collapse
You can set battery protect to turn on at whatever battery percentage utilizing Samsung Routine. I did this for a while at 90%, but have since turned it off as I will most likely upgrade my phone by next year.

I use battery protection overnight and whenever I need my phone connected. Ex: Android Auto.

neilth said:
As I previously stated, self implemented battery protection on several phones I have owned made a huge difference for me. Charging to 100% every night left me with a very noticeable decrease in battery capacity within a year and a half or so. Maintaining the battery between 30 - 80% produces a night and day difference in battery endurance. I still own a Pixel 2XL that has never been charged to 100% and the battery capacity is around 85% and the phone still works great.
Click to expand...
Click to collapse
How big of a difference are we talking here, before i use my S22U i have an Oppo F9 which still have good battery despite charging it too 100% every day for 3 years but that's probably because the SoC isn't very strong to begin with so it doesnt use that much power, while my phone before that which is an iphone 6 that is a hand me down and collectively used for 4 years have really bad battery where i have to charge 2-3 times despite only using it for messaging and youtube
the reason i really care about the battery health on this phone is because of how expensive this phone is compared to the other phone i have in the past and i do plan to use it for a long time

chris2412 said:
How big of a difference are we talking here, before i use my S22U i have an Oppo F9 which still have good battery despite charging it too 100% every day for 3 years but that's probably because the SoC isn't very strong to begin with so it doesnt use that much power, while my phone before that which is an iphone 6 that is a hand me down and collectively used for 4 years have really bad battery where i have to charge 2-3 times despite only using it for messaging and youtube
the reason i really care about the battery health on this phone is because of how expensive this phone is compared to the other phone i have in the past and i do plan to use it for a long time
Click to expand...
Click to collapse
In the past I have had a Sony Z2 and a Nexus 6P both suffer drastic battery degradation in under two years by fully charging them every night. With my next phone, a Pixel 2XL, I started using a smart plug which I configured to be controlled by software monitoring the battery charge and turning off the battery charger when charging reached 80%. After five years, this phone is still operational and its battery health is above 80%. I am now using similar technology on my S23U.

TheMystic said:
1. Never used battery protection feature because I always charge my phone to 100% and keep it connected for another 5 minutes or so.
2. I don't use Adaptive Battery feature either because I haven't seen any benefits from it.
3. Lots of theories on keeping the phone battery between some range. I don't follow it because benefits from such practices are insignificant during the expected ownership life of the phone (about 5 years on average).
Click to expand...
Click to collapse
Been Warp Charging my OnePlus 8T at full speed for 2.5 years now, often charging it twice a day. Battery life is fantastic and so is it's health. Practical experience taught me that some of the theories may be true, but have little practical application. One must NOT bother too much with these things as they ruin user experience.

neilth said:
In the past I have had a Sony Z2 and a Nexus 6P both suffer drastic battery degradation in under two years by fully charging them every night. With my next phone, a Pixel 2XL, I started using a smart plug which I configured to be controlled by software monitoring the battery charge and turning off the battery charger when charging reached 80%. After five years, this phone is still operational and its battery health is above 80%. I am now using similar technology on my S23U.
Click to expand...
Click to collapse
Could you share a link of the smart plug you're using?

I've never used Battery Protect. I charge my phone over night to 100%. I use wireless charging almost exclusively. By the time I leave work, it is at around 78%. I have it set to best performance.
I've taken it on the road several times and always had enough juice to make it to my hotel after 10 hours of traveling.
I haven't noticed any battery degradation.