I'm not sure if this has been posted yet, but when I unplug my phone after charging it overnight, it gets to 90% or so in around 30 minutes without use, and goes down at a fast rate throughout the day. If I charge it and unplug it exactly when it hits 100%, I can use the phone fairly regularly and it will take around 2 hours to get down to 90%, and depletes from there very slowly. What's the reason for this, and is there any way I can get the same battery life when leaving the phone overnight?
Running CM7 with incredikernel, although my phone has been this way with countless ROMs and kernels.
pickleman77 said:
I'm not sure if this has been posted yet, but when I unplug my phone after charging it overnight, it gets to 90% or so in around 30 minutes without use, and goes down at a fast rate throughout the day. If I charge it and unplug it exactly when it hits 100%, I can use the phone fairly regularly and it will take around 2 hours to get down to 90%, and depletes from there very slowly. What's the reason for this, and is there any way I can get the same battery life when leaving the phone overnight?
Running CM7 with incredikernel, although my phone has been this way with countless ROMs and kernels.
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Short answer: Yes, you will see better battery life, and no there is not really any foolproof way to make it work if you leave it on the charger after it hits 100%.
Long answer: The Incredible has a battery saver feature built in that prevents over charging by cutting off charge to the battery when it hits 100% (actually 96% according to the people who figured all this out and are way smarter than I am) and doesn't let it start to recharge until it hits 80%. The reason, when you take it off in the morning, it drops so fast is because it is no longer actually at 100%, but has dropped to a legitimate ~90% since having hit the "100%" threshold.
There are some kernels out there that do allow "trickle charging" meaning they keep the phone at a legit 100%, but I don't think many have seen much success using them with the Incredible.
I get around this by charging a bit at night (using anywhere between 80-100%), leaving it off the charger until morning (I usually drop only around 4-5% per 8 hour night) and plug it back in while I get ready and eat breakfast. This usually puts me around 95-100% depending how much I was able to charge the night before and seems to be a much more simple way to handle it than bump charging in my opinion.
search first. It has been asked multiple times.
unreal2k said:
search first. It has been asked multiple times.
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I've seen similar topics regarding the quick drop from 100 to 90%, but the battery life as a whole seems to be much longer when it's taken off the charger immediately after it hits 100%. There's so many topics on here, I can't find exactly what I'm talking about, so it's difficult to judge. I'll definitely try the tip in the second post though. Thanks!
It will charge it up to 100% but it won't stay there if you keep it in. It'll let the phone die down to 90% then it'll keep it at that level.
So yes if you unplug it when it first hits 100% you will have a full 100% battery. If you let it sit for much longer than it'll be at 90%
It's been said that leaving it on charger for a while after fully charged messes with the battery meter.
I always bump charge. Charge it full while on then power off and charge till green lights on. Def gets me more batt life. Im getting 24+ hours on a single charge under normal usage with UD 3.1.1.
sent from my Ultimate 2.33 Incredible
http://forum.xda-developers.com/showthread.php?t=871051&highlight=lying
That should help you out!
Related
Hey guys, I rooted and installed mikfroyo 4.2 on my evo. I read a bit and thought I had to use recovery to wipe battery data. I did this and since then I have noticed that the battery usage/percent is off.
Ex: 100-90% goes very quickly, then 80% takes much longer.
I just plugged it into my charger at 29% and about 5 mins later its saying 56%.
The battery lasts long enough so I figure the battery is good.
What should I do aside from wiping the battery data? Do I have to calibrate it somehow?
Thanks
Sent from my PC36100 using XDA App
100% - 90% drop off is normal. Should normalize after 80%. There are some battery tricks n tips to charging if you look around. Pretty much consists of charging to full then turning off and charging some more then turn on, turn off and charge some more.
There are hundreds, if not thousands, of posts on this subject. The issue is battery longevity. When the battery reaches 100%, it stops charging (to reduce heat and increase battery life span). It only starts charging again after the battery drops below 90%. So your 100% display is lying to you.
There is a custom kernel that continues to charge the battery at a lower rate once it reaches 100%. You can find it here...
http://forum.xda-developers.com/showthread.php?t=876590
I'm using it with the Evo-NonSense ROM and it's amazing how much better battery life is. I've had the battery meter read 100% for close to an hour after unplugging.
I suppose it's possible I may have to replace the battery sooner due to using this kernel, but that's a price I'm willing to pay.
BR
The 100% > 90% is due to the kernel not allowing a trickle charge. Meaning once your phone hits 100% it switches to battery. It doesn't start charging again till it hits 90% or so. So when you unplug your phone, even if it says 100%, it is actually at 90%.
There are kernels that enable trickle charge but there is a debate going around as to whether or not it damages the phone.
sekigah84 said:
The 100% > 90% is due to the kernel not allowing a trickle charge. Meaning once your phone hits 100% it switches to battery. It doesn't start charging again till it hits 90% or so. So when you unplug your phone, even if it says 100%, it is actually at 90%.
There are kernels that enable trickle charge but there is a debate going around as to whether or not it damages the phone.
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It could be anywhere from 100% - 90% not definately gonna be 90%
A drop of Chuck Norris's semen was placed on the IPhone. We now have the Htc Evo.
Crossrocker said:
It could be anywhere from 100% - 90% not definately gonna be 90%
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I've been really confused lately because the meter says 100% when plugged in but the moment I unplug it in the A.M. it cuts over to 92%-96%... this makes sense now.
I have now done three cycles now drained to 1% and put on charge over night when I unplug and check the phone it says 98% and drops 2-3% within 5 mins of use. But if I plug it back in it will then go back to 100%. Anyone else?
Martinp86 said:
I have now done three cycles now drained to 1% and put on charge over night when I unplug and check the phone it says 98% and drops 2-3% within 5 mins of use. But if I plug it back in it will then go back to 100%. Anyone else?
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There have been threads about this already. Batteries, once charged fully, cannot 'keep charging', so they will stop charging until it is low enough to charge again.
This protects the battery from all sorts of nasty and evil things.
^ precisely. Batteries shouldn't be pegged at 100% and continue to be charged. The firmware lets it drain down then charge up again. You can just get 'unlucky' and unplug at a point where its discharging and at 98%.
I remember that happening with the Nexus S. I'm thinking it must be a Samsung thing. It's just one of those weird OEM things like, Motorola phones measuring the battery in 10% intervals.
All manufacturers charge their batteries this way but there are many ways to mask that process. People apparently want to see a fully charged phone when they plug it off the charger. They don't mind that their phone drops to something between 95% and 100% in a matter of minutes as long as it's "full" upon disconneting. Seems Google just displays the correct charge instead of pretending to be on 100%.
gokpog said:
All manufacturers charge their batteries this way but there are many ways to mask that process. People apparently want to see a fully charged phone when they plug it off the charger. They don't mind that their phone drops to something between 95% and 100% in a matter of minutes as long as it's "full" upon disconneting. Seems Google just displays the correct charge instead of pretending to be on 100%.
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Pretty much. The G2 with stock firmware (and from what I remember with the Evo 4G w/ stock), HTC charges to 100%, discharges back to 90%, and charges back up again. etc.. The LED charge indicator turns green at 90% (so according to them, anything about 90% is a "full charge").
You can see this in regular use. There are days where my phone sits at 100% for hours, and others where it only takes an hour to tick down do 99%, even with the same usage. Just depends what "state" the battery is at when you pull it off charge in the morning.
Thanks guys im happy if its one of those oem quirks.
Martinp86 said:
Thanks guys im happy if its one of those oem quirks.
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If by "quirks" you mean honesty then yes.
Martinp86 said:
Thanks guys im happy if its one of those oem quirks.
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Its not a quirk, they're just trying to preserve your battery health.
Is there a preferred battery charging regimen for the One X battery?
That is, is it better to, say, always let it drop to 15% and then recharge to 100%, or can/should I charge whenever possible, or in smaller increments?
Also, are there disadvantages to using the phone while charging (as I tend to do quite a lot )?
Thanks!
i normally let mine down to about 10% then just charge it too 100%
treebill said:
i normally let mine down to about 10% then just charge it too 100%
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Right, but do you know if this is actually the way to go with the Li-Po battery or are you, like me, just winging it?
When i first got my phone i let it run down till it asked for the charger, then left it on charge over night.
I did this for the first 3 or 4 times as i found this yields the longest battery life, since then i charge every 2 days regardless what percentage is left always over night though.
Going to leave it tonight & see if it will go till tomorrow night, its been off charge since 7am on Friday morning so far & is still on 46% a total of 39 hours so far.
anoniemouse said:
When i first got my phone i let it run down till it asked for the charger, then left it on charge over night.
I did this for the first 3 or 4 times as i found this yields the longest battery life, since then i charge every 2 days regardless what percentage is left always over night though.
Going to leave it tonight & see if it will go till tomorrow night, its been off charge since 7am on Friday morning so far & is still on 46% a total of 39 hours so far.
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You get two days on a charge? Are you a wizard? Although, having just got the phone (and possessing the patience of a 5 year old), I've done a lot of start-stop charging, which I suspect isn't optimal.
I'll try to refrain from trickle charging for a while, see how much difference it makes. Thanks.
Another battery charging thread? Just plug in the damn phone! It will take care of the rest.
Sent from my SGH-I777 using xda premium
I have noticed that the battery does drain in strange amounts.
I have my wifi & gps on constantly, my phone went for 2 days 5 hours & i received a text at which point the phone was at 34% battery.
The phone was put back in stand by & the phone went totally flat in the next 4 hours, this i find strange as over night in stand by it only uses 1 - 2%.
There is obviously a bug in the way the phone reports its battery state, by my reasoning this must be some 10 - 15% lower than what it is reporting.
It does seem to have some difficulties reading the battery level correctly. I've noted a couple of times that it shows a significantly higher charge level (+5-7%) after a reboot. Which is hardly likely to recharge the battery. (Unless I got me one of those perpetuum mobile, in which case, yay!)
It takes about 3-4 hours sometimes to charge from 99% to 100% but just a few minutes to drop from 100%-99%.So, my question is, is it worth to charge the battery on your Nexus to 100%? What do you guys do? Any advantages of charging the battery to 100%?
I'm talking about the stock battery in the GNex.
Thanks in advance,
vG
doesnt take that long to go from 99 to 100% here. its usually pretty quick.
percentage is really a horrible way to gauge battery charge level. Efficiency wise it really isnt worth the time invested to charge beyond 90% but either way it doesnt matter. if YOU feel it isnt worth it, dont do it.
verruckterGeck said:
It takes about 3-4 hours sometimes to charge from 99% to 100% but just a few minutes to drop from 100%-99%.
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This is stating the obvious, but only you can answer your own question.
How much is 3-4 hours of time worth to you? If 3-4 hours is worth the same as the few minutes it takes to go from 100% > 99%, then I guess you could say its worth the wait. Otherwise, no.
The technology in today's battery is so good that charging even just a little don't harm your battery like it used to do.
Swype'ed on my CM10 Galaxy Nexus
Most kernels (including stock?) have a cut off of 96% actually.
The remaining 4% is just placebo...
It's not great on a battery to remain at full charge so it's really dropping and raising as determined by your kernel but the phone will display "charged" no matter where in this cycle it actually is.
The couple of percentage points you're losing are so minimal it's nothing to worry about...and it's innacurate.
I think it comes down to what you mean by "is it worth it?" If you know that you're going to be away from a charger for a while and need every last bit of power you can get, then yes. But if you can get through the day without recharging or have access to a charger to tide you over then I would say no.
My goal is to be as gentle on the battery as possible so long as it does what I need it to do. Personally I try not to charge my phone above 90% and try to recharge it before it drops below around 30%. (this is based on general lithium ion charging recommendations from here:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
I am able to get through the day with this setup and I have access to a charger at work if I ever run out of power. If you're charging your phone up to 100% then recharging at home with 50% remaining, you may consider stopping charging at 90% so that you have 40% at the end of the day, as it will be easier on your battery.
Thank you all for the valuable advise. I am using Rasbean Jelly ROM with Trinity Kernel so I get pretty good battery life so, I guess based on the feedback, I am going to skip charging to 100%. What I kept wondering is if there were any drawbacks to not charging to 100% but doesn't look like it.
vG
Sent from my Galaxy Nexus using xda app-developers app
Hi, My battery used to stay at 100% for at least 20 min with minor use after taking it off the charger. Now, it drops fairly quickly to 97% with the same usage. Overall I think I am left with the same percentage at the end of the day, but I was wondering if anyone else experienced this.
How old is the battery, are you leaving it on the charger for long periods after it's fully charged. Their longevity wears down so it's going to happen. But you can take some steps to stretch it out to the max. Mine goes from 100% to 95-96% in about 30-45 minutes right now
Wicked Stock Rom w/ Stock Kernel. No tweaks
Saintfyre said:
How old is the battery, are you leaving it on the charger for long periods after it's fully charged. Their longevity wears down so it's going to happen. But you can take some steps to stretch it out to the max. Mine goes from 100% to 95-96% in about 30-45 minutes right now
Wicked Stock Rom w/ Stock Kernel. No tweaks
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Thanks, Its about a month old. It is on the charger for at least several hours after its fully charged. Also, I am completely stock.
Just curious, is your device idle in the 30 min that it takes it to go from 100% to 95%? If not are you doing intensive stuff to takes it to 95%?
mikea3000 said:
Thanks, Its about a month old. It is on the charger for at least several hours after its fully charged. Also, I am completely stock.
Just curious, is your device idle in the 30 min that it takes it to go from 100% to 95%? If not are you doing intensive stuff to takes it to 95%?
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Yeah mostly idle, just running back ground tasks and such. Very minimal use.
Also I think leaving it on the charger for long periods of time reduces the life span of the battery as well. That's why it notifies you to take it off when it's fully charged. And I believe I read that somewhere else also.
But also if you leave it charging all night the phone may say 100% however the phone to prevent it self from charging the battery to long it stops charging it and let's it drain from 90% to 100% and slowly charges it back up. So as not to damage the battery. It keeps following that loop to keep your battery running longer so the first 10% can sometimes be misleading but it's nothing to worry about
Sent from my SGH-M919G using Tapatalk 4 Beta
This was fairly common on the SGS2.
The common way to fix it on that device was to charge it to 100%, then unplug it and plug it back in and wait until it gets to 100% again. Do this 3-5 times and the problem should be gone. It is worth a shot on the SGS4
This can happen when flashing ROMs while your battery is not full, though this is not the only way for this to occur.
I like that last one. Gotta try it out.
The kernel stops charging at 100 percent and doesn't start again until it guys 95. What you're reading as your percentage level is not the exact levels
Say you unplug at what you think is 100 percent but in reality it's actually 98 percent, the software quickly relays this back to the user and adjusts the battery levels accordingly making you think it just drained 2 percent really quickly.
The whole reason it does this is to percent over charging the battery. That will greatly shorten it's life cycle or even worse blow up your battery
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