Do any of you experience that after 95% it seems to take way longer to charge that last 5% than getting to 95%?
Actually, the last 20% should be slower than initial 80% due to the battery being Li-ion and fast charging technology. You can have a quick search on google and see for yourself.
Specifically the Z Play I have, charging up to 80% is warmer and faster than the last 20%.
It is also suggested by a lot of people that you should only charge your device to 80% to maintain that battery for the longest time possible. I still charge my phone all the way tho.
It's how Lithium battery charging works, first it's constant current CC and then constant voltage CV. Once the battery voltage reaches a certain value (4.2V or more depending on the Lithium battery type), the charge current decreases every time the battery voltage tries to go over this preset max voltage. The charge current gradually decreases and when it reaches a certain value (usually 0.2-0.3A) the charge stops.
Awesome. Makes sense. I was just wondering. Good stuff!
EspElement said:
Do any of you experience that after 95% it seems to take way longer to charge that last 5% than getting to 95%?
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It will charge device fast till 76 percent after that it charges slowly.
You had also noticed that phone get warms up a little during charging till the battery percentage reach to 76 percent.
Related
Hi!
I'm looking for an application, that quickly kills my battery if it's low, so I can do a full charge to improve battery life.
Something, that I launch, I put my phone on the desk, have a tea meanwhile, and it's drained! Something, that turns on wifi, do some downloading, browsing, video playing, or whatever, and does it automatically without supervision. Does such app exists?
I'll second this, it'd be nice to have an app do this for me and maybe even give us some interesting stats from it?
Sent from my mind using telepathy
why would you want an application to destroy your battery?
Adevem said:
why would you want an application to destroy your battery?
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Apparently if you do a full discharge the battery life will be longer.
Soniboy84 said:
Apparently if you do a full discharge the battery life will be longer.
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not really, you should avoid deep discharges...
Byr0x said:
not really, you should avoid deep discharges...
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+1 If you had been reading around...you would know Lithium Ion batteries are designed to 'maximize' their efficiency within about two weeks of 'top up' charging. Cycle-charging is generally considered a less efficient method of charging. You will need to 'TopUp charge' this means charging as much and as often as possible. If your battery is at 89% for instance and you find yourself near a socket, plug your adapter in and charge it up to 100%. After a few days of doing this you will notice an improvement in the life of your battery when you are not able to charge.
Actually,,,
It is not matter of running your battery down to 0%.
It is ok to run it down till phone does to power on itself.
As you know battery is a single cell Li-Ion @ 3.7v
when it is fully charged it's peak voltage is 4.2v
By the time battery mah is drained down (galaxy s has 1500mah)
battery voltage should be around 3.2~3.4v range. this will depend on condition of the battery.
Battery should never go below 3.2v personally, 3.4v is my cut off.
If your battery voltage goes below 3.2v... it's time for a new battery as this kind of voltage will damage your battery, either it will leak or puff (battery will actually get bloated.
Phone has a voltage cut off so it will not over charge over 4.2v but if it does, it will likely start to smoke and catch fire.
I am sure anyone who is into electric Radio control knows all about these batteries.
Oh btw,,, long time storage voltage should be 3.8v
You'll be asking how do I know what voltage my battery is... I personallly don't know of any apps but GPS Status actually shows the temperature & voltage of your battery.
Soniboy84 said:
I'm looking for an application, that quickly kills my battery if it's low, so I can do a full charge to improve battery life.
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First, take into consideration the comments above regarding deep discharge of your battery...but, to answer your question, there's an app in the market place called 'Battery Refresh' which attempts to drain your battery quicker.
Well if it's all true above than its a good sign, and thanks for the info! I'm not an expert but in the old times I remember batteries had to discharged completely, maybe even if it's just a few times. Now somebody can also tell me why my battery is discharging when it's plugged in the socket with original charger? All I do is using the internet, and has. nimbuzz and a live wallpaper on. :S
You could probably enable the GPS/BT/WIFI ( connected to a router ) and run the interactive mode on Neocore benchmark.. that should enable most of the hardware components on the phone and stress the GPU/CPU.. probably would see a 25% battery drain for every 35-40mins.
I don't know what has changed with the batteries but as far as I know...
it is good to discharge new batteries 3~4 times down until phone does not power on.
Like I have said... it's about the voltage of the battery, not whether battery has any juice left in it or not.
These batteries have a protective circuitry so that it will not charge over 4.2v,
also as for discharge it is usually down to 3v but usually with a charger/discharger units that can control mah/volts/amps. With typical usage from the phone, it'll likely be discharged down to about 3.2`3.4v. Which is very safe.
You can do whatever you feel but I personally do this to every batteries I have for phone and every batteries I use with my radio controled cars.
For my RC cars, I have about 6 batteries ranging from 1cell to 3cell LiPo packs.
Each cell is 3.7volts.
But you don't have to force discharge and hurry the process.
Just use the phone normally and let it run down to nothing... than recharge to full peak.
Than again, choice is yours.
I'm looking for the same kind of applications. It's very useful for recalibrating your battery. Wipe the battery history then do a full cycle.
Sent from my GT-I9000 using XDA App
The old saying in RC Helicopters was that the difference between discharging 50% and 100% was the difference between getting 500 uses and 5 uses.
You should certainly avoid ever fully dischaging any lithium based battery.
Older nickel batteries (Ni-cd, Ni-MH) required full dischage cycles to get rid of memory the the metals pertained, lithium-ion and lithium-ion-polymer not only do not require this; but doing so will damage them.
And yes, the older ipods came with Nimh cells and they did reccomended full discharge cycles.
Im pretty sure the idea was to try not to let the voltage get below 3.5v/cell and never below 3.3. Dead flat is 3 or 2.85 which is when the battery simply cant produce any real current. The phone should have circuitry though to not let the voltage get above 4.25 or below ~3.5.. If the low battery warning comes on, set the brightness to dim, and stop any activities (unless its a phone call, its not THAT important but if youre playing games or watching a movie...) until yo can get to a charger.
By the way this being my first post (i meant to ages ago) Ill just mention that my galaxy S came with recovery mode and download mode Enabled, i got it just last month, Virgin network, Australia.
draining the battery fully was for the older battery types, new age batteries are not recommended to be drained fully
Thanks!
One more question:
I'm using my phone as a desktop replacement, because I don't have Internet at the moment. I'm using xda, dolphin browser and listening music. It's plugged into the mains and it's not charging. It says 49%, and stuck there. Is it possible I'm using too much battery?
Sent from my GT-I9000 using XDA App
Ok, this will be my last reply.
Fully draining or not is not the issue.
In RC, most modern electronic speed controllers have a built-in battery cut-off which will cut off power once it reaches certain voltage. Because OVER-draining battery without cut off can damage/kill/ or make it unable to hold voltage.
Also, once the battery voltage reach certain point (still within safe range) you will notice the motor being powered slow down. This would also be a recommended time to stop.
Cellular phones have built in safe cut off aswell. As I have said I have measured my battery after being full drained, voltage was around 3.55v or so. Which is very normal considering voltage of the battery is 3.7v only with peak charged voltage of 4.2.
Now, Someone mentioned that fully draining your battery repeatedly will dramatically reduce battery life.
Reducing life of the battery has more to do with the amount of AMP used to charge the battery. Faster charging is usually reduce battery life dramatically.
And without hobby grade chargers, you won't be able to control this charge rate.
Slow charge is better but charging at 1C rating is the normal. But charging at 1C means regardless of batteries mah rating, battery can be charged in about 60 minutes. As we all know, our phone batteries doesn't charge from zero to full in 60minutes, right? just like most of the portable devices it takes nearly 3~4hours to fully recharge. Last 20% usually takes longer because Amp provided to charge slowly lowers. That is why.
For example, if Galaxy S battery is 1500mah, than 1C charge rate is @ 1.5amp.
If battery is 3000Mah, 1C is 3.0Amps and so on.
So like I have said over and over before, drain your battery away if you have to by choice or not. Just use it up, I will bet you your battery will last longer than you keep your phone.
U should avoid draining ur battery to 0% (witch is not possible with ur phone. When it shows 0% the charge of the battery is at 10-15%). Li-ion batteries dont have a memory effect, so it would be usless discharching it completely anyhow. Best for sgs battery is charging it before it goes under 50% that will improve the lifetime of ur battery (not how long it lasts before u have to charge but how long it lasts before u have to go and buy a new one)
How do i know? Simply cause i had to learn that a few weeks ago for the job im learning.
@xxgg: yes ur right, it wont really damage the battery if u runn it till thr phone shows its empty. But using an app to drain battery as quick as possible will, since the app forces the battery to give out more Ampere than its built to give out
Sent from my GT-I9000 using Tapatalk
I have a 3900 mAh battery from Mugen. Ive noticed the battery lasts about 30 hours. But I find something very strange. It drains around 96% in just 15 minutes on straight boot after charging every time. In fact, the first 80% of so drains pretty quickly? Ive had it in my phone for about 2 weeks. Has anyone else noticed this or know why this may be happening. Also when at 100%, and i inplug it, goes straight to 98!
Have you done a battery calibration? Get the Battery Calibration app from the play store.
There's some argument as to whether this does anything or not, but have you conditioned the battery? That means letting it drain completely, then charging it continuously till it hits 100% - do that several times.
Its been proven that the app does nothing, which wipes battstats.ini or something
As for conditioning, its been down to around 3% before being charged. Ivehad the battery 2 weeks now.
Lithium Ion batteries have a very steep drain for about the first 15-20% and also slower charging from those levels. Once past that the drain is nearly linear, and then gets very steep at about 3.6v.
You can see it in the graphs here:
http://www.ibt-power.com/Battery_packs/Li_Ion/Lithium_ion_tech.html
Typically the way our devices are designed, they do not charge the battery to 100% full it can actually cause damage to lithium ion based batteries. what happens is the battery is charged to 95%-98% then the device stops the charge and allows the battery to drop to abut 85%-90% and then starts trickling it again. By design the batteris typically drain a little bit fast at the top level.
further more lithium ion batteries survive more recharge cycles if the D0D (depth of discharge) is about 25% remaining.
Basically you battery will last longer by the device not charging to 100% and letting it discharge slightly when in trickle mode, and if you don't let it die completely and charge it when it reaches around 15%-20% left.
-Mr. X- said:
Typically the way our devices are designed, they do not charge the battery to 100% full it can actually cause damage to lithium ion based batteries. what happens is the battery is charged to 95%-98% then the device stops the charge and allows the battery to drop to abut 85%-90% and then starts trickling it again. By design the batteris typically drain a little bit fast at the top level.
further more lithium ion batteries survive more recharge cycles if the D0D (depth of discharge) is about 25% remaining.
Basically you battery will last longer by the device not charging to 100% and letting it discharge slightly when in trickle mode, and if you don't let it die completely and charge it when it reaches around 15%-20% left.
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Hmm that kind of makes sense. Everyones been telling me to not let it drop to below 35% though cause it 'wears the battery out'. Ive been charging at around 40 cause thats where itd be after a full day at work and such.
Ive been getting concerned though because ive seen screenshots of people getting 31 hours with 7 hours of screen on time.
Im at 62%, 9.5 hours total, 1 hour 7 min screen on. Thats mostly with Wifi on though.
My stock battery used to drop 10% an hour on 4g, and this one dropped ~11% on 4g just now....
mknewman said:
Lithium Ion batteries have a very steep drain for about the first 15-20% and also slower charging from those levels. Once past that the drain is nearly linear, and then gets very steep at about 3.6v.
You can see it in the graphs here:
http://www.ibt-power.com/Battery_packs/Li_Ion/Lithium_ion_tech.html
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Thanks for the graph!
Sent from my amazing G2x running EaglesBlood and Faux.
Now at 36% And its just sitting off mostly with some light texting
Now 35!
Got a weird feeling the battery is messed up.
Its 3900mah, divide by 650 = 6 hour charge
Its been 6 hours and its at 46% with the phone off so its not using power, and on the wall charger.
Rekzer said:
Its been proven that the app does nothing
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I haven't heard that before. Got a source for that info?
mayonaise said:
I haven't heard that before. Got a source for that info?
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http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
I notice the "tips" to use it to charge it to 95% MAX, and use it to no less than 5%. Are these claims true? I have no problems of re-charging it before the 5% mark, but to constantly keeping an eye on the phone while charging it can be tedious and annoying.
Anybody can shed some light my way regarding this subject?
Thank you!
Well, your anker lipo would feel better (and any other lithium polymer battery for that sake) if you would not do full cycle every time. Full cycle means you goes from full to empty charge/discharge. (95 down to 5% counts almost as a full cycle)
Say chemistry in lipo can make 200 full cycles before 20% capacity lost or 500 half cycles (like from 100 to 50% and then recharge to 100%). See the difference, longevity will be bit better with half-cycles.
If you store lipo for prolonged period of time (like month) then don't charge it to 100% but to 50%.
And don't keep your phone in high temp zones (like in a sun in the car) this will kill lipo in no time.
Other then that just enjoy your anker. It's cheap enough to replace it in 500 half-cycles (which might be translated to couple years)
Thanks for the response! From the way you describe it, it sounds very familiar with how my lipo batteries for my rc cars work.
I usually charge my phone at 30% mark to fully charge. So, given that, it'd be ok for me to charge it overnight (to 100% then trickle charge until morning), and let it discharge to 30 - 40% then recharge.
Phone will stop charging lipo when it reaches 4.2V so there is no problem to over-charge it... keep it on a charger overnight.
I do one full cycle about once in month but this is for different reason.
Usually, I can go from 100% at morning to 40% at evening in two days. Then recharge it overnight. I think my Anker 2200mAh will outlast my SGSII.
So I've been running some random tests with my battery and usage to try and figure out how this thing maintains charge and such. I'm running rooted stock TW 4.1.1 with Juice Defender.
1. Usually, I charge the phone overnight while I sleep, then when I unplug it, it drops down to 99% immediately. Lately, it's been dropping down to around 96% in 45 minutes of no use then leveling off. This is with a new battery that replaced another one right after the Jellybean upgrade as I thought my battery was busted.
2. I usually get about 12-14 hours with 2.5-3hrs of screen time (I get crappy service where I work and the phone is in airplane mode when not in use, and when in use, it has bad service).
3. This weekend, I didn't charge it over Friday night and let it die Saturday morning. Then I charged it for about 3 hours or so and ended up getting about 34ish hours with 3.5 hours of screen time out of it (using wifi and better network since I'm at home).
4. I charged it overnight last night (about 9 hours) and when I unplugged it, it dropped to 98 immediately, then 30 minutes later it was down to 96 again.
With all that said, I'm thinking that I probably should not be charging my phone overnight at all anymore. The only problem with that is that I don't have enough time in the morning to charge it before work and I can't charge it while at work as I move around all day.
Will I wear my battery down more by not fully charging it and using it throughout the day and only charging it when I can? I've read that battery website that people post constantly where they talk about how the new batteries stop charging after a certain period of time, but if that were the case, why would I get better battery service from only charging for 3 hours then leaving it overnight?
I know there are a million battery threads on here and we probably didn't need another one, but i thought I'd try to create one with a bit more substance than "oh i get 6 hours with 5 hours screen time on such and such a ROM". I'm more interested in the physical methods than the software methods for getting the best out of the battery.
The quick drop off in battery charge is probably partly due to some hysteresis that has already built up. There is a lag time between the voltage demand on the battery and the battery's ability to deliver the required current. Energy is lost during this lag time.
I posted this another forum so I am recycling but it is relevant.
Some general guidelines when charging Li-ion batteries:
A slow charge is preferable because it reduces heat and hysteresis. Heat of any sort decreases the overall life of the battery. Hysteresis reduces the performance of the battery in the discharge state causing a quicker plummet in battery charge from 100%. (NiMH batteries are worse with hysteresis, but Li-ion cells suffer from hysteresis also).
Unplug the charger as soon as possible when the battery is fully charged.
Lithium ion cells however can not tolerate overcharging or overvoltage and the charge should be terminated immediately when the upper voltage limit is reached.
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Do not use charging pads or mats as they introduce more heat.
Pulse chargers do the best job because they give the battery brief rest periods to allow the chemicals to settle and accept the charge with reduced hysteresis and heat.
A memorable though not quite equivalent phenomenon is the pouring of beer into a glass. Pouring very quickly results in a lot of froth and a small amount of beer at the bottom of the glass. Pouring slowly down the side of the glass or alternatively letting the beer settle till the froth disperses and then topping up allows the glass to be filled completely.
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Depth of discharge. Consistently letting the battery run down to very low reduces the overall lifetime. It is better to minimize the depth of discharge by topping off when convenient than running it down completely.
Similar to a mechanical device that wears out faster with heavy use, so also does the depth of discharge (DoD) determine the cycle count. The shorter the discharge (low DoD), the longer the battery will last. If at all possible, avoid full discharges and charge the battery more often between uses. Partial discharge on Li-ion is fine; there is no memory and the battery does not need periodic full discharge cycles to prolong life, other than to calibrate the fuel gauge on a smart battery once in a while.
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Can't yet post direct links
Battery University . Com
mpoweruk . com / chargers . htm
gotcha. so i shouldn't be charging it overnight anymore. thanks for all that other info, too. very useful to know.
Hey its been a few days since ive received my one plus 5t. Wanted to know what are the typical charging cycles you guys use. Do you guys charge when battery is below 5 and stop at 100? or something different.
i am aiming to use this phone for about 3+ years so would be great to know how can i maximize my usage in this duration.
jelousdogs said:
Hey its been a few days since ive received my one plus 5t. Wanted to know what are the typical charging cycles you guys use. Do you guys charge when battery is below 5 and stop at 100? or something different.
i am aiming to use this phone for about 3+ years so would be great to know how can i maximize my usage in this duration.
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you can charge your device pretty much at any time just don't let it drain to 0% (shut off condition) as that'll theoretically deteriorate the battery in the long run. I had a wrong perception that charging the phone from 0-100 and discharging back to 100-0 will make the battery last a little longer ( tried it with my moto e and moto g which eventually started giving me random shutdowns at 20-25% juice left) which is totally opposite of what you should do. With the 5t I usually put it on charge around 15 and then straight to 100 or around 70 when I'm in a rush.
I typically charge when the battery is around 20 - 30% and I have an app to stop charging when 60% is reached. According to Battery University it's best to keep between 30% to 60% but of course practicality has to come first. 60% upper limit has worked pretty well for me as I can usually charge my phone when needed.
https://forum.xda-developers.com/android/apps-games/root-battery-charge-limit-t3557002
There are two factors killing a battery: heat and voltage. A lot of heat (over 30°C) will degrade the lifespan of your battery.
High and low voltage can degrade it too. The optimal voltage would be around 4.05 V. Anything higher degrades it and anything far too low (under 3.5 V or so) can even make it non operational without a high current "boost" to make it usable again. However, lithium batteries tend to charge to 4.4 V which is good for battery life but bad for the lifespan.
In short you should not keep your phone at 100 % over a long period of time and never discharge it completely. Heat and voltage induced by fast charging is also bad (faster charging means higher voltages of a few 100 mV).
I'm using Magisk and the Magic Charging Switch module to charge it to 90 % and only charge it at 80 % again. At night I lover it to 80 % and 70 % and 45 minutes before I wake up it is charged to 100 % making the battery only use the max voltage for 1 to 2 hours instead of the whole night.
Leaving the phone plugged in wouldn't hurt it im terms of cycles etc. but the constant high voltage does hurt. More information can be found here. Really worth a read: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries