Charging phone while using it? - Xperia Z2 Q&A, Help & Troubleshooting

I have recently bought the Sony Xperia Z2 and like everyone else, I take extra care of my phone when its new. One thing I would like to preserve is the battery and keep it as good as it is till my next upgrade.
My question is, is it bad to use a phone while its charging? Would this have any negative affect on the battery or is it perfectly fine to do so?

I don't see very light usage of it while charging causing any issues, if you are playing a game or doing something more demanding then it might possibly cause issues with battery reporting. I just charge mine at night while sleeping.

It's better not to do it but in our age it won't be a problem if u ask me.
Sent From My Sony Xperia Z2 D6502 White

Only if...
Give it concern if u r keeping the phone for more than a year, if not then enjoy without complaining!

To preserve your battery as long as possible, no. Also, top up the charge as often as possible, not allowing it to drop below around 40% and don't charge it higher than 70%.
Of course this is a bit unrealistic and will likely lower your enjoyment of the device. But I do recommend not fully charging your phone (only go as high as 90% at most) as the last part of a charge strains the battery a lot and you don't lose much capacity (especially with this phone). Like someone else said, too, light usage while charging won't do much damage.
For more information read this: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

you can use if while it's on charge but don't play high graphics games or video calling ( skype )
light usage such as chatting on facebook is fine, as long its not draining the battery it is fine else if you fine the battery abnormal, you can calibrate it again, check this link for more info : http://www.androidauthority.com/how...attery-and-achieve-longer-battery-life-43307/

Heat
Fadeless said:
I have recently bought the Sony Xperia Z2 and like everyone else, I take extra care of my phone when its new. One thing I would like to preserve is the battery and keep it as good as it is till my next upgrade.
My question is, is it bad to use a phone while its charging? Would this have any negative affect on the battery or is it perfectly fine to do so?
Click to expand...
Click to collapse
Yes.
The Z2 emits more heat while charging. The heat is prejudicial to the battery even more the motherboard and other part, which slows in taking bad effect.
If you use it while charging, the battery will more short-lived than others.

Related

[Q] Battery charging quite slow

I got an replacement due to my phone beyond repair.
I'm running original stock firmware, of-course rooted. Since the replacement I'm trying to get my phone to full charge but it doesn't and also I notice that the charging is quite slow.
I installed "Battery Monitor Widget" to see how much power it is drawing and found that AC power draws only about 350+mA and sometimes it is as low as 8mA. (Some times it draws about 750+mA). I notice that the temperature also reaches somewhere about 45 to 48 degree.
Once it reaches about 90% or so, it starts to drain battery instead of charing it.
I find it quite abnormal. Anyone with this kind of problem and found an solution?
Thanks in advance for the replies and suggestions.
What I'd sudjest is updating your phone through seus or PC companion or if your an American at & t user update to a newer firmware through the flash tool (you can find I link to it through my signiture) or if you can't update try and use the repair option through seus or PC compainion.
Sent from my X10 using XDA Premium App
The Gingerbread Man said:
What I'd sudjest is updating your phone through seus or PC companion or if your an American at & t user update to a newer firmware through the flash tool (you can find I link to it through my signiture) or if you can't update try and use the repair option through seus or PC compainion.
Sent from my X10 using XDA Premium App
Click to expand...
Click to collapse
Thanks for your reply.
I did that yesterday. I repaired the firmware and reloaded all the application one by one from scratch. The only thing I restored is contacts so that I could eliminate all the other factors which can cause this issue.
My other suggestion would be to install xrecovery and wipe your battery stats I guess. You can find a link to xrecovery through the link in my sig
Sent from my X10 using XDA Premium App
The Gingerbread Man said:
My other suggestion would be to install xrecovery and wipe your battery stats I guess. You can find a link to xrecovery through the link in my sig
Sent from my X10 using XDA Premium App
Click to expand...
Click to collapse
Thanks once again for the reply.
I tired that too every time I try to charge the phone. Still it refuses to complete the charging.
Any other suggestions are welcome.
What about off line charging ie; turning the phone off and doing that way?
Sent from my X10 using XDA Premium App
The Gingerbread Man said:
My other suggestion would be to install xrecovery and wipe your battery stats I guess. You can find a link to xrecovery through the link in my sig
Sent from my X10 using XDA Premium App
Click to expand...
Click to collapse
+1 it helped me off this problem
Sent from my X10i using XDA App
The Gingerbread Man said:
What about off line charging ie; turning the phone off and doing that way?
Sent from my X10 using XDA Premium App
Click to expand...
Click to collapse
Good idea. I will try that as well as try to do a clean wipe and just try to charge with nothing loaded in. That will give a better idea where the problem is.
Thanks for the great tip, I will update you tomorrow.
Had that happen before, I had to remove sim card and let it drain out slowly for a week, then charge. Problem solved
I think I had similar problem, except that my processor went on full load when its almost fully charged causing it to drain the battery instead. Still lookin for answer to that, will wiping battery stats help?
I reset my phone to factory and did a re-flashing again using SEUS and I tried it charging immediately without loading any application (only loaded Battery Monitor Widget from Market to see the battery temperature and mA units drawn) and wow, it charged like a normal X10. So I guess it has something to do with whatever I loaded or modded it with.
I'm trying to find it out. Later tonight I will try to load all the application one-by-one and try again to charge to see whether I can isolate it.
During this process, I did takeout my SIM card for a period of 1 hour or so, so not sure whether that did the trick (If that's the case, thanks to gogogu)
In the meantime, I have a strong feeling it would be due to the flashtool and new recovery, but again there isn't any proof. I suspect this because this is the new thing I did compared to my old phone.
Any thoughts are welcome.
Monitor the CPU usage as well
zymphonyx said:
Monitor the CPU usage as well
Click to expand...
Click to collapse
I don't have issues with processor. It works at full throttle when it supposed to work and then goes back to normal.
Hrmmm alright, but if you ever had the draining issue while charging and the battery temp rises up again. Check the CPU usage just incase
After yesterday's event, seems like stable (I did face the same issue once). Not sure which cured it and currently monitoring...
EDIT: Back to square one. The issue started again and the battery refues to fully charge! I'm going mad
Finally given up, sent for service and came back after 5 days of repair.
Repair Notes: No problem found !!!
But today morning I tried to charge and it's the same issue . Makes me go mad. Really, I don't know what to do!
Please help me friends .......
I too have exactly the same problem with my x10i.....
tried everything like rooting, using stock & custom ROMs, etc... still problem persist ...
while charging , power goes from 900mA to 200mA or lower, & doesn't reach 100% full...
i use current widget from market to read the power values ....
please help me friends .... to resolve my problem ...
Thanks a lot...
Makzer.
nobody replying
hello mates...
please reply to my problem dear friends ..
looking forward ...
LiveSquare said:
I got an replacement due to my phone beyond repair.
I'm running original stock firmware, of-course rooted. Since the replacement I'm trying to get my phone to full charge but it doesn't and also I notice that the charging is quite slow.
I installed "Battery Monitor Widget" to see how much power it is drawing and found that AC power draws only about 350+mA and sometimes it is as low as 8mA. (Some times it draws about 750+mA). I notice that the temperature also reaches somewhere about 45 to 48 degree.
Once it reaches about 90% or so, it starts to drain battery instead of charing it.
I find it quite abnormal. Anyone with this kind of problem and found an solution?
Thanks in advance for the replies and suggestions.
Click to expand...
Click to collapse
What program do you use to check your battery temperature. I rememeber there was one that wass bettery draining. The same is also possible with battery level monitor
Sent from X10
Use this tool forum.xda-developers.com/showthread.php?t=1415600
Please read this. There is a lot of batt info on xda just search
http://forum.xda-developers.com/showthread.php?t=871051
I realize that much of this is common knowledge on XDA. Still, every day I see people post about how their phone "loses" 10% as soon as it comes off the charger. I also have friends who can't understand why their battery drains so quickly. Trying to explain this to people without hard numbers is often met with doubt, so I figured that I'd actually plot it out with real data.
So it's not a piece that is optimized for this audience, but I hope that you find it interesting.
--------------------------------------------------
Your Smartphone is Lying to You
(and it's not such a bad thing)
Climbing out of bed, about to start your day, you unplug your new smartphone from its wall charger and quickly check your email. You've left it plugged in overnight, and the battery gauge shows 100%. After a quick shower, you remember that you forgot to send your client a file last night. You pick up your phone again, but the battery gauge now reads 90%. A 10% drop in 10 minutes? The phone must be defective, right?
A common complaint about today's smartphones is their short battery life compared to older cell phones. Years ago, if you accidentally left your charger at home, your phone could still make it through a weeklong vacation with life to spare (I did it more than once). With the newest phones on the market, you might be lucky enough to make it through a weekend.
And why should we expect anything else? Phones used to have a very short list of features: make and receive phone calls. Today we use them for email, web surfing, GPS navigation, photos, video, games, and a host of other tasks. They used to sport tiny displays, while we now have giant touch screens with bright and vibrant colors. All of these features come at a cost: large energy requirements.
Interestingly enough, improvements in battery management technology have compounded the average user's perception of this problem. Older phones were rather inelegant in their charging behavior; usually filling the battery to capacity and then switching to a trickle current to maintain the highest charge possible. This offered the highest usage time in the short-term, but was damaging the battery over the course of ownership. As explained at Battery University, "The time at which the battery stays at [maximum charge] should be as short as possible. Prolonged high voltage promotes corrosion, especially at elevated temperatures."[1]
This is why many new phones will "lose" up to 10% within a few minutes of coming off the charger. The reality is that the battery was only at 100% capacity for a brief moment, after which the battery management system allowed it to slowly dip down to around 90%. Leaving the phone plugged in overnight does not make a difference: the phone only uses the wall current to maintain a partial charge state.
To monitor this, I installed CurrentWidget on my HTC ADR6300 (Droid Incredible), an app that can log how much electric current is being drawn from the battery or received from the charger. Setting it to record log entries every 10 seconds, I have collected a few days worth of data. While many variables are involved (phone hardware, ROM, kernel, etc) and no two devices will perform exactly the same, the trends that I will describe are becoming more common in new phones. This is not just isolated to a single platform or a single manufacturer.
Chart 1 shows system reported battery levels over the course of one night, with the phone plugged in to a charger. Notice that as the battery level approaches 100%, the charging current gradually decreases. After a full charge is reached, wall current is cut completely, with the phone switching back to the battery for all of its power. It isn't until about two hours later that you can see the phone starts receiving wall current again, and even then it is only in brief bursts.
The steep drop in reported battery seen past the 6.5 hour mark shows the phone being unplugged. While the current draw does increase at this point (since the phone is being used), it still cannot account for the reported 6% depletion in 3 minutes. It should also be obvious that maintaining a 100% charge state is impossible given the long spans in which the phone is only operating on battery power.
Using the data from CurrentWidget, however, it is quite easy to project the actual battery state. Starting with the assumption that the first battery percentage reading is accurate, each subsequent point is calculated based on mA draw and time. Chart 2 includes this projection.
Now we can see that the 6% drop after unplugging is simply the battery gauge catching up with reality.
The phone manufacturers essentially have three choices:
1. Use older charging styles which actually maintain a full battery, thereby decreasing its eventual life
2. Use new charging methods and have an accurate battery gauge
3. Use new charging methods and have the inaccurate battery gauge
Option one has clearly fallen out of favor as it prematurely wears devices. Option two, while being honest, would most likely be met with many complaints. After all, how many people want to see their phone draining down to 90% while it is still plugged in? Option three therefore offers an odd compromise. Maybe phone companies think that users will be less likely to worry about a quick drop off the charger than they will worry about a "defective" charger that doesn't keep their phone at 100% while plugged in.
Bump It. Or Should You?
One technique that has gained popularity in the user community is "bump charging." To bump charge a device, turn it off completely, and plug it into a charger. Wait until the indicator light shows a full charge (on the ADR6300, for example, the charging LED changes from amber to green) but do not yet turn the device back on. Instead, disconnect and immediately reconnect the power cord. The device will now accept more charge before saying it is full. This disconnect/reconnect process can be repeated multiple times, each time squeezing just a little bit more into the battery. Does it work?
The following chart plots battery depletion after the device has received a hefty bump charge (6 cycles) and then turned on to use battery power. Note that the system does not show the battery dropping from 100% until well over an hour of unplugged use, at which point it starts to steadily decline. Again, however, it should be obvious that the battery gauge is not syncing up with reality. How could the rate of depletion be increasing over the first 5 hours while the rate of current draw is relatively steady? And why does the projected battery line separate from the reported levels, but then exactly mirror the later rises and falls?
The answer, of course, is that bump charging definitely works. Rather than anchoring our projected values to the first data point of 100%, what happens if we anchor against a later point in the plot?
Aligning the data suggests that a heavy bump charge increases initial capacity by approximately 15%. Note that the only other time that the lines separate in this graph was once again when the phone was put on the charger and topped up to 100%. Just as with the first set of graphs, the phone kept reporting 100% until it was unplugged, dropped rapidly, and again caught up with our projections.
So what does it all mean?
If you absolutely need the highest capacity on a device like this, you will need to bump charge. There are currently people experimenting with "fixes" for this, but I have yet to see one that works. Be warned, however, that repeated bump charging will wear your battery faster and begin to reduce its capacity. If you are a "power user" who will buy a new battery a few months from now anyway, this presumably isn't a concern. If you are an average consumer who uses a device for a few years, I would recommend that you stay away from bump charging. The bottom line is that you don't really "need" to do it unless you are actually depleting your battery to 0% on a regular basis.
If you are someone who can top off your phone on a regular basis, do it. Plug it in when you're at home. Plug it in when you're at your desk. As explained by Battery University, "Several partial discharges with frequent recharges are better for lithium-ion than one deep one. Recharging a partially charged lithium-ion does not cause harm because there is no memory."[2]
Beyond that, the best advice I can offer is to stop paying such close attention to your battery gauge and to just use your phone. Charge it whenever you can, and then stop obsessing over the exact numbers. If you really need more usage time, buy an extended-capacity battery and use it normally.
From my XPERIA X10S v8.2 on JaBKerneL @ 1.15ghz

[Q] xperia S Display taking up 61% of the battery

bought an xperia s few days back...its battery life is downright pathetic i get 4-5hrs of battery life on moderate usage...did a factory reset today but still nothing....i keep the display at 50% brightness and the bravia engine off
any solutions
i am on .45 ics firmware
and on a side note is it just me or does the camera sucks the pics especially the indoor ones are way to noisey
50% brightness? You really need that much? Mine at around 25%, I think is enough for me even on outside (I set it to 35% on sunlight).
Pictures noisy even on indoors? I think your device is faulty, because mine are awesome, even on outside. Just on low light that they are a quite lot noisy.
Battery ain't that great man , but thats the only thing i find a little bit annoying .. other than that android and sony say that you can charge your phone as much as you want and it wont hurt battery life so recharge when you can
agree with the guy above i only need about 25% of brightness .. at first it might seem too dim but your eyes will get use to it and you won't see it as a problem
keep anything you don't use off like GPS bluetooth NFC or anything like that .
Sony was forced to seal the battery in because of NFC .. its the way the device is built , some people tweaked the phone ( cut the plastic in a pro way that you can buy 2 batteries lets say and switch between them .. ) check youtube * .
update your phone to 6.1.A.2.50 ( connect to pc companion if it wasn't pushed to your device ) battery life is slightly improved
one last thing you can buy an externel battery charger to charge you phone on the go like for example :
http://www.amazon.com/PowerGen-External-Blackberry-Sensation-Thunderbolt/dp/B005VBNYDS/ref=sr_1_1?ie=UTF8&qid=1350202242&sr=8-1&keywords=powergen
Thats about it hope i've helped

Playing game while charging = bad for phone?

Hello, phones already, let's set clearly , very hot when you use it normally while charging (~45C° NOW in summer) then when playing , app report about 50C but it feels like much more... Those sorry of exploding galaxys are worrying me. What do you think?
Constantly running the phone @ high temperatures will probably shorten the life of the battery a bit, how much is hard to say. Does it shorten the life of the CPU or other components ? Maybe. But lets face it many (most ?) people change phones every year or two these days so that's not really an issue. You're more likely to notice the battery thing if you do it often enough.
Me personally, I don't do anything heavily CPU intensive with the phone while it's charging. I mean, how easy is it to do whatever it is you have to do with the phone (play a game or whatever), then throw it on charger when you're done & not using the phone ?
With the poor battery of the SII, I prefer avoiding such situation : playing with kill battery in 3h or less, so unless I'm closer to full charge, I'll play will charging. This to avoid ultra low battery at any time. I'm not concerned by battery dying, I'm concerned by the explosion as said...
MistahBungle said:
Constantly running the phone @ high temperatures will probably shorten the life of the battery a bit, how much is hard to say. Does it shorten the life of the CPU or other components ? Maybe. But lets face it many (most ?) people change phones every year or two these days so that's not really an issue. You're more likely to notice the battery thing if you do it often enough.
Me personally, I don't do anything heavily CPU intensive with the phone while it's charging. I mean, how easy is it to do whatever it is you have to do with the phone (play a game or whatever), then throw it on charger when you're done & not using the phone ?
Click to expand...
Click to collapse
As you said, high temperatures will shorten battery life.
An important aspect is that you shouldn't fully discharge the battery before charging it.
Charging from 50% to 100% will permit you about 1500 recharges.
Charging from 0% to 100% will permit you about 500 recharges.

Isn't Fast Charging Bad For The Battery?

Isn't Fast Charging Bad For The Battery?
That would depend on the battery's C rating. Charging at higher rates doesn't necessarily cause damage. There are plenty of articles on charging lithium ion/poly cells out there.
In my previous S7 Edge , the battery lost plenty of juice in just one year of usage ( i was using wireless charging only). Then i sent it to samsung warranty and they replace battery. Tried to find something about if could be the wireless charging that damaged the battery and found none that supported that theory.
Now, with the S8, i´m using the provided charger and cable only (Just to be safe).
Vogal said:
In my previous S7 Edge , the battery lost plenty of juice in just one year of usage ( i was using wireless charging only). Then i sent it to samsung warranty and they replace battery. Tried to find something about if could be the wireless charging that damaged the battery and found none that supported that theory.
Now, with the S8, i´m using the provided charger and cable only (Just to be safe).
Click to expand...
Click to collapse
Wireless is different due to the losses in the induction, creating heat, which does have some affect. But there are a lot of variables as to why your battery performance may have degraded.
LeoNote4 said:
Isn't Fast Charging Bad For The Battery?
Click to expand...
Click to collapse
Are you a battery engineer/chemist?
peachpuff said:
Are you a battery engineer/chemist?
Click to expand...
Click to collapse
Battery President.
?????
Gesendet von meinem SM-G950F mit Tapatalk
LeoNote4 said:
Battery President.
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Click to collapse
Right... it seems every day someone thinks they know more than engineers in that field, battery is getting hot so it must be bad. Yet every year qualcomm and others improve quick charging for even faster charging, so unless someone actually knows something these threads should just stop.
peachpuff said:
Right... it seems every day someone thinks they know more than engineers in that field, battery is getting hot so it must be bad. Yet every year qualcomm and others improve quick charging for even faster charging, so unless someone actually knows something these threads should just stop.
Click to expand...
Click to collapse
I think what's going on here is someone doesn't know so he is asking a question.
LeoNote4 said:
I think what's going on here is someone doesn't know so he is asking a question.
Click to expand...
Click to collapse
Why would you assume its bad for the battery in the first place? Just because it gets hot? The cpu also gets hot when gaming so i should stop gaming? Recording 4k videos also heats up the phone so i should stop recording 4k video's? Constantly downloading will probably heat up the modem too so i should stop downloading? If something is built into the phone why would you assume its bad for the phone?
peachpuff said:
Why would you assume its bad for the battery in the first place?
Click to expand...
Click to collapse
I didn't.
peachpuff said:
Just because it gets hot?
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Click to collapse
What gets hot? Who said anything about hot?
Hey, don't take it badly, he is just asking. I remember old batteries (for example ni-mh) if you charge it at a high current they use to live less than if you charged them at a slow one (i remember using rechargable batteries of this time for my wii control and i could test it with how long they lasted).
I think the new Li-ion (or better) batteries nowadays don't suffer from this, so you should be safe about them. They have a natural capacity loss thats isnt affected about the rest of the things. You should anyway check for faulty chargers or your battery life, remember all the test samsung makes are with their original hardware.
Regards!
peachpuff said:
Why would you assume its bad for the battery in the first place? Just because it gets hot? The cpu also gets hot when gaming so i should stop gaming? Recording 4k videos also heats up the phone so i should stop recording 4k video's? Constantly downloading will probably heat up the modem too so i should stop downloading? If something is built into the phone why would you assume its bad for the phone?
Click to expand...
Click to collapse
This is someone not knowing what they're taking about trying to talk down on someone else.
Anyways heat has always been detrimental to battery health which is why samsung fast wireless chargers have fans built in to keep the heat low. Along with this the phone will prevent charging if it passes a certain heat threshold I believe 40c iirc and also the phone uses adaptive charging to prevent over heating of the phone with the included fast charger and charging circuit design. As long as the phone continues to regulate the charge coming into the phone fast charging shouldn't hurt. Of course with fast charging you go through battery cycles faster but this is just because you can charge it a lot more times than with regular charging.
My personal experience:
- 2 years of fast charging = battery drain between 100 and 90 very much noticable
- charging over night causes more damage than fast charging

How To Guide How to limit charging on Pixel 6

With credit to VR-25 from Github:
If you edit these files and put you own values in then your phone will start charging when it drops below 75% and stop when it gets to 80%. (put your own values in, etc.)
I have only tested it briefly but it seems to work for AC and USB charging for me so far. No other apps or tweaks needed.
/sys/devices/platform/google,charger/charge_start_level:75
/sys/devices/platform/google,charger/charge_stop_level:80
EDIT: You need to be rooted to do this, and you need to reapply the settings after reboot.
I have a Tasker action that does this automatically 5 minutes after rebooting.
If only there was a way to use that without root :-S
What would be the purpose for this.
I always charged to a 100% and never had issues on my devices.
I use the adaptive charging overnight and think that will help with battery life.
vandyman said:
What would be the purpose for this.
I always charged to a 100% and never had issues on my devices.
Click to expand...
Click to collapse
If you do some reading you will see that charging over 80% and draining under 20% will significantly shorten the lifespan of your battery. This is important for those of us that have devices not sold in our country so getting replacement batteries would be very difficult and expensive. I have phones that are more than 9 years old and still going fine if charged like this.
Galaxea said:
If you do some reading you will see that charging over 80% and draining under 20% will significantly shorten the lifespan of your battery. This is important for those of us that have devices not sold in our country so getting replacement batteries would be very difficult and expensive. I have phones that are more than 9 years old and still going fine if charged like this.
Click to expand...
Click to collapse
If you would have read the correct information on this subject. You would know that this not true for today's battery technology.
This is nothing but a myth.
You will have a better chance looking for Bigfoot.
Why waste 40% of your battery use....
vandyman said:
If you would have read the correct information on this subject. You would know that this not true for today's battery technology.
This is nothing but a myth.
You will have a better chance looking for Bigfoot.
Why waste 40% of your battery use....
Click to expand...
Click to collapse
On the contrary. The most recent phones attempt to limit the time that they spend at 100% exactly because it's so bad for battery longevity. Having options like the OP's approach just gives users more flexibility, should they want more control than, in this case, Google's adaptive/AI approach.
And it's not 'wasting' 40% of the battery. Keeping between 80% and 20% just optimizes battery service life during those days you only actually only need 60% of it's possible capacity. When working from home that's often the case for me. I actually tend to use ~30% of the battery in a day. Better to charge it up daily to about 70% than all the way to 100% and let it go down to 10% over 3 days. If it's easy to do, why not?
Not quite the same, but EV design also has their batteries normally operating in the middle range so as not to compromise their service life...
Definitely not myth. The only myth is that lithium cells exhibit a memory effect and need to be deep discharged and fully recharged periodically to maintain their capacity. It's actually bad for them to do this! The only reason to do this would be in an attempt to recalibrate the software for the battery level gauge (at the cost of a little damage to the battery each time you do that).
vandyman said:
What would be the purpose for this.
I always charged to a 100% and never had issues on my devices.
Click to expand...
Click to collapse
Most folk don't notice reduction in battery capacity until it becomes severe. For example, a friend claimed it wasn't a problem charging his iPhone to 100% ritually. When he checked the OS, it said his battery capacity was 80% of what it was when new. He said he hadn't noticed it affect how long the phone lasted.
If your usage is such that you can predict how much capacity you need, you can choose to charge to 100% only those times you will actually need that capacity. Other times you can look after the battery so it's able to actually give near on 100% for longer, those times it's important to you.
Others who keep their phones a short time or are comfortable with the cost & inconvenience of a battery replacement, or simply don't care, don't have to worry....
WibblyW said:
On the contrary. The most recent phones attempt to limit the time that they spend at 100% exactly because it's so bad for battery longevity. Having options like the OP's approach just gives users more flexibility, should they want more control than, in this case, Google's adaptive/AI approach.
And it's not 'wasting' 40% of the battery. Keeping between 80% and 20% just optimizes battery service life during those days you only actually only need 60% of it's possible capacity. When working from home that's often the case for me. I actually tend to use ~30% of the battery in a day. Better to charge it up daily to about 70% than all the way to 100% and let it go down to 10% over 3 days. If it's easy to do, why not?
Not quite the same, but EV design also has their batteries normally operating in the middle range so as not to compromise their service life...
Definitely not myth. The only myth is that lithium cells exhibit a memory effect and need to be deep discharged and fully recharged periodically to maintain their capacity. It's actually bad for them to do this! The only reason to do this would be in an attempt to recalibrate the software for the battery level gauge (at the cost of a little damage to the battery each time you do that).
Click to expand...
Click to collapse
This all maybe good if you are planning on keeping your device for a few years.
Most people buy a new device every other year. If not once a year.
... and if you really want to knacker the battery, heat it up too!
Worst case scenario - using a sat nav app on your phone in the car on a hot day with the phone plugged into a car adaptor. It's going to be sitting there at elevated temperatures, possibly with the sun shining on it, whilst being kept at 100% battery....
I'm only a customer (and have no other affiliation) and like to tinker, so I got one of these for use in the car to limit temperature when charging and limit max charge. Not cheap, but ok compared with the cost of the phone https://chargie.org/
I'm sorry, but at the snails pace this phone charges I'd be very surprised if charging it to 100% every night will make any noticeable difference in the long run. I had a Xiaomi Mi10 Ultra with 120W fast charger. That phone used to charge from 0% to full in like 20 minutes. Now that's one way to quickly kill your battery.
The Pixel uses your alarm to adaptively charge the battery so it should never overcharge it anyway. I'd much rather us all of my battery than use it only between 20 and 80% just for it to last a little longer.
The files are overwritten on reboot so I created a Tasker task to write the values on reboot each time.
Biggenz said:
I'm sorry, but at the snails pace this phone charges I'd be very surprised if charging it to 100% every night will make any noticeable difference in the long run.
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On what basis? All the research and tests are based on charge level not charge rate. Fast charging potentially just makes it worse...
But at the end of the day it's your phone. You'll charge it in whatever way works for you.
I feel like this post sort of misses the point. It clearly is aimed at those intending to keep their phones >1yr, it is stated explicitly.
I'm not rooted right now, so I've been using the AccuBattery app. One of the things it does it gives a notification every few minutes when the battery is at 80% or above so that you can physically unplug the phone from the charger. Obviously having this done automatically would be better, but I've been surprised at how well the notifications have worked in my case. Plus, I can always leave the phone plugged in if I know I need a full battery for some reason (ie a long day away from any charging source).
Galaxea said:
With credit to VR-25 from Github:
If you edit these files and put you own values in then your phone will start charging when it drops below 75% and stop when it gets to 80%. (put your own values in, etc.)
I have only tested it briefly but it seems to work for AC and USB charging for me so far. No other apps or tweaks needed.
/sys/devices/platform/google,charger/charge_start_level:75
/sys/devices/platform/google,charger/charge_stop_level:80
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Dumb question but what did you use to write values into those files? Did you use a text editor (with root access) or just termux or something? I tried with the built in MiX text editor but it seems to choke once I open up the file.
Gibsonflyingv said:
Dumb question but what did you use to write values into those files? Did you use a text editor (with root access) or just termux or something? I tried with the built in MiX text editor but it seems to choke once I open up the file.
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Click to collapse
I used FX File Explorer (root option). Look for the #. SYSTEM (Root).
I was wondering if changing the file permissions after writing to them to read-only would make the changes stick, but I am sure the OS could still overwrite them...??
I wonder if there's a similar variable to tweak at what temperature the phone considers the battery is too hot and stops charging?
Galaxea said:
With credit to VR-25 from Github:
If you edit these files and put you own values in then your phone will start charging when it drops below 75% and stop when it gets to 80%. (put your own values in, etc.)
I have only tested it briefly but it seems to work for AC and USB charging for me so far. No other apps or tweaks needed.
/sys/devices/platform/google,charger/charge_start_level:75
/sys/devices/platform/google,charger/charge_stop_level:80
Click to expand...
Click to collapse
Did a bit of testing and it works fine. A few things I noticed:
1. Doesn't survive reboot. Now that I've set up MiX with pinned folders, I can make the change in seconds. Need to sit down and read through the acc documentation because AccA doesn't work. Would love to have an automatic solution. Miss my old Battery Charge Limit.
2. charge_start doesn't seem to matter. After all, if charge_start is set to 75 and the phone is at 70%, it shouldn't charge. But it does. I've kept mine at 0.
3. Point #2 is kinda beside the point, though, because charge_stop will stop at the set value and stay there. No noticeable increase in temperature from what I can see. Definitely less than when charging.
4. Still shows as charging rapidly when it hits the level. Is it rapidly cycling charging on and off? Or in a kind of micro-current state? Or this may be a true battery idle situation where all power is drawn from the adapter. Ampere and AccA just show "not charging".
Edit: With a bit of use today, it does seem to act like a normal min/max charge deal, so I set it at 75 start/76 stop. Not sure what was happening at first...maybe something to do with the adaptive charging since I still have that on. Either, way, no complaints. With my use case working from home, I have it plugged in most of the day and it'll only take me about a minute to change charge_stop to 100 when I'm planning to go out all day somewhere away from chargers. Not ideal, but still a big improvement. Changes my rating of the thing from maybe 3.5 stars to 4.5.

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