Database Develop

first 25% of battery drops fast?

Ok so this is what i noticed has been happening with my phone...
I wake up in the morning and i unplug my phone from charger at 100% battery life...
after about 1-2 hours of no use (outside of occasional check of time) and no programs running i notice that 25% of life has diminished...
i have turned 3g off and done most of the kaiser tweak settings that help with battery life. for the rest of teh day i can use the phone and battery life runs normally but it seems the first 25 to 30% drops real fast without use
is everyone experiencing this? is it normal?
KP

The problem lies in your first sentence. "I wake up in the morning and unplug my battery." You are charging your battery too much thus killing it's battery life. I only charge my phone in the day while I'm at work. That way I can unhook it when it's fully charge. I would go on ebay and type in OEM battery Kaiser. You can pick one up for 15-30 dollars new.

From what I understand. Leaving your battery in the charger when it is fully charged should not damage the battery as long as its not there for an excessive amount of time but i might be wrong. Either way i have no way of charging the phone during the day as im on the go most of the time so this would mean even if i get a new battery it wont matter because it wile eventually do the same as i have only used this phone for about 3 or 4 months now. any other possibilities or solutions?
or should i just take it as it is and just buy a new battery maybe a bigger seido?

I thought Lithium ion batteries have overcharge protection. I charge mine overnight which I am sure a lot of others do also with no negative effects.

netboy said:
I thought Lithium ion batteries have overcharge protection. I charge mine overnight which I am sure a lot of others do also with no negative effects.
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I do... Maybe I shouldn't?

I would hope it has Overcharge Protection!!!
With NiCad Batteries if you overcharged them you would kill the life of the batteries.
And while all batteries do this LiIon are least tolerant. If you overcharge a LiIon battery, that is without Overcharge protection, the LiIon Battery with BURST INTO FLAMES! Thus the problem with the Sony Batteries that caused all those Laptop battery recalls.

gqstatus0685 said:
You are charging your battery too much thus killing it's battery life.
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Thats total BS with lithium batteries.
To the OP: Try running down your battery completely once, until the phone switches off by itself, then recharge fully. If you never do it and always recharge before the battery is empty the battery's power meter can lose its calibration over time and display weird things.
If it doesn't help, and you can notice a drop in overall life time you might need a new battery.

I have the exact same "problem" with my Tytn II.
Is slows down evenly though. (So the first 5 % of battery vanishes in minutes basically while the last 5 % can last for an hour, when it's half full % will last somehwere in between these two extremes).
Personally I've just interpreted this as poor measuring done by the hardware and/or software. (Ie I don't think the battery performs better the less full it gets as the meter in Windows would have me think)

kilrah said:
Thats total BS with lithium batteries.
To the OP: Try running down your battery completely once, until the phone switches off by itself, then recharge fully. If you never do it and always recharge before the battery is empty the battery's power meter can lose its calibration over time and display weird things.
If it doesn't help, and you can notice a drop in overall life time you might need a new battery.[/QUOTE
thanks ill try it out as soon as i get a chance...
kp
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may seem a daft point but after draining the battery, dont charge with the phone turned back on. gives a fuller charge cos its not being used and makes it quicker to charge, lol

duke0102 said:
may seem a daft point but after draining the battery, dont charge with the phone turned back on. gives a fuller charge cos its not being used and makes it quicker to charge, lol
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Hmm...I don't see how turning my phone off to charge would increase the charging rate dramatically. My phone in standby mode uses 1% every 2 hours.

depends highly on roms and especially on radios.
with a crappy rom, battery could drop as fast as 10% per hour.
with a decent rom, battery drops in standby mode at a rate about 2% per hour.

duke0102 said:
may seem a daft point but after draining the battery, dont charge with the phone turned back on. gives a fuller charge cos its not being used and makes it quicker to charge, lol
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If the phone is on but on standby that barely changes a thing. If it's on, with display illuminated then yes it might take you an extra 20 minutes to charge.. no big deal either.

*UPDATE*
ok so i drained my battery last night completely(turned on navizon, tt7, and skyfire) which took me about at most 2 hours.
Put it in for a charge
woke up at 9 and checked to see and it was 100%
I have push mail set to update every hour and i also run pocket sportscenter autoupdates which updates every 10 to 15 minutes
I used the phone for 5 minutes of calls
5 minutes of web surfing
a few text messages
and the occasional time check
at 6:30 pm battery life was at an amazing 90%
i was thrilled.
i continued to surf the web heavily from 730 to 8
a few more text messages
at 9 battery was at 67%
so i gotta believe that draining the battery helped recalibrate it...
i guess every 2 or 3 months i got to drain it out and give a full charge
thanks for the help guys
really appreciate it

Phone shutdowns itself when battery hits the 7% mark

I'm trying to nail down if this is normal behavior or not my phone always shutdowns itself when the battery level goes below 7%, no matter what.
then I turn it on it boots and shows 0% of battery left then it shutdown again, next time I try it's totally dead.
Tried with a battery calibration improved the overall battery life but that mark is still there.
Is that normal? I mean when I used to have a G1 it lasted until 1% or so.. 7% can be very well an extra hour of usage that I'm loosing.

emudojo said:
I'm trying to nail down if this is normal behavior or not my phone always shutdowns itself when the battery level goes below 7%, no matter what.
then I turn it on it boots and shows 0% of battery left then it shutdown again, next time I try it's totally dead.
Tried with a battery calibration improved the overall battery life but that mark is still there.
Is that normal? I mean when I used to have a G1 it lasted until 1% or so.. 7% can be very well an extra hour of usage that I'm loosing.
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I've noticed the same thing. It'll be interesting to see if anyone has a solution.

7% of battery life is just a number. It could very well be inaccurate, and simply reporting 7% when you actually have 0%. When you reboot and it shows 0% just backs this idea up. You are not "losing" an hour of battery life, you simply never had it.
To check this, use spare parts to look at the voltage of your battery when it approaches 7%.
Also, this belongs in the QA section.

I'll give it a try, interesting is the fact that both Cyanogen RC3 and Battery Monitor are reporting the same thing.
Will keep an eye on the voltage, what should it say ? something near 0?

seriously?
AFAIK li-on battery never be below 5% or 7% why?
because if you get below of this the battery will be dead and will not work anymore. so thats normal.

zen kun said:
seriously?
AFAIK li-on battery never be below 5% or 7% why?
because if you get below of this the battery will be dead and will not work anymore. so thats normal.
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I've also read its normal but if its normal why isn't it calibrated to show 0% when its actually at 7%? My phone goes off at ~10%
btw there are so many battery threads lately.. http://forum.xda-developers.com/showthread.php?t=702167

Yeh, mine also goes off at around 10%.

it seems normal then , time to get myself a spare battery ... travel can be painful if no power outlet / usb port is near me

Yes its kinda normal. My phone has always shut down at 8% from day 1. I think its because of what we're talking about in the battery cal thread personally.

[Q] CM (and others?) battery meter complete screw-up

My battery never charges above ~76% when plugged in. After rebooting however, it is very much at 100% and lasts for a good amount of time. This is not necessarily a question, but I wonder if others are experiencing this too and if there is a fix? Read below.
I noticed that my battery life got very bad after installing custom roms. I also found out that this happened because I sometimes kept the phone plugged in while flashing, something that totally screws up the battery reading. So, I followed this guide to calibrate my battery and it worked.
Now, whenever the phone is plugged in it NEVER goes to 100% when charging. Maybe 80% if leaving it for a while (10 hours overnight). I'm worried about frying the battery. Is there a fix?

It is only a matter of presentation. It actually doesn't mean your batt is broken. Plug it and charge it overnight. Then discharge only for few percent and plug it back in. It should go to 100%.
Sent from my HTC Legend

Thanks, I'll give it a try.
What I'm concerned about is if the phone "thinks" the battery isn't recharged and keeps squeezing juice into it when in fact it is full (which a reboot will show)? That's not good for the battery. It should go into trickle charge after reaching 100%..

The process described in the desire forum is also known as formatting the battery. In fact most of battery manufacturers (lithium battery manufacturers) recommend doing this in a slightly different way:
Before first use:
1.) Before powering the device on, plug it in and let it charge until the LED is green (fully charged)
2.) Then take the battery out of the device and wait an hour (to make sure all the chemical processes in the battery are as idle as possible)
3.) Then plug it back in, while still off and let it charge untill green LED
4.) use the device....
You can practice this slightly modified with first step being:
Discharge the battery (by normal use)until only few percent are left (1 - 5 % are OK)
I've done these steps with my Mugen extended battery and I was getting around 4 - 5 days on Legend, now I'm getting 2 - 3 days on Desire S, but the ROM isn't very optimized yet, I believe it will be better in time...

Just one thing... Why is this in Development!?

No Idea.....
can mods move this?

BlaY0 said:
It is only a matter of presentation. It actually doesn't mean your batt is broken. Plug it and charge it overnight. Then discharge only for few percent and plug it back in. It should go to 100%.
Sent from my HTC Legend
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sz1a did this solve your problem? Have the same problem with every firmware i've tried....

peddalion said:
sz1a did this solve your problem? Have the same problem with every firmware i've tried....
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Definitely did not solve it but at least the battery performance is ok. It just stays at 78% for a few hours drops from there. Very weird but as long as the battery doesn't get broken I guess it's ok.

Do you have some 3rd party battery installed in your Legend? I have one 1,5 Ah in mine and it is acting the same way. It doesn't bother me too much coz it was cheap... it lasts 48 hrs with data always on and moderate usage. I noticed this that when I charge it overnight and it reaches 80%, unplugging it stays at 80% for several hrs and just after it starts dropping if I plug it again, meter reaches 100%. It's weird but as I said I can live with that

I've got exactly the same issue with stock 2.2 ROM. I've never rooted or CM my phone; I was wondering if CM would do it, but doesn't look like it.
android forums /htc-legend/265545-battery-doesnt-fully-charge.html
(sorry, I can't post links; maybe an admin can fix the link for me?
This seems to indicate it's a phone hardware fault and requires a new Legend to fix! My big worry is, as stated, that the charging light never goes green; therefore is pumping lots of power into a potentially full battery.

[Q] Fluctuating battery charge

My battery charge fluctuates, sometimes it goes up from 5% to 35%, sometimes it seems depleted (2%) and if I check in 15 minutes it's 10% and so on.
I'm running CM 7.2 and previously Darky ROM 10.2. Since this started happening I've used a couple of the top-rated battery calibration tools, but to no avail.
Any ideas? Is it a hardware problem? Or a driver problem with the custom ROMs? Or something else?

Try the following If you haven't already.
Charge phone until it says it's full.
Discharge until it turns off. Try to turn it on to make sure it's absolutely flat.
Do this again.
Then charge it periodically so that you keep the percentage between the 20 and 90 approximately, and see if it improves.
Repeat first steps.
Wiping battery stats and similar "calibration" has no effect on neither the percentage shown or battery performance.
Sent from horseback.

Thanks for the advice, I'll try it and see what happens. Any ideas to the cause of all this? Also, would buying a new battery help?

I don't really know the reason why this is happening, Li ion batteries can be somewhat of a black arts.
A new one should fix it anyway, and they're very cheap where I live at least
Sent from horseback.

pandronic said:
My battery charge fluctuates, sometimes it goes up from 5% to 35%, sometimes it seems depleted (2%) and if I check in 15 minutes it's 10% and so on.
I'm running CM 7.2 and previously Darky ROM 10.2. Since this started happening I've used a couple of the top-rated battery calibration tools, but to no avail.
Any ideas? Is it a hardware problem? Or a driver problem with the custom ROMs? Or something else?
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I passed through Same problem when i had updated my mobile to jelly bean for first time. But after 7-8 days fluctuates is decreased from +/-20% to +/- 2%. And fluctuates are gone after 20 days.
So dont worry, just wait for 20 days.

I have a Galaxy Nexus, not rooted, and it does this all day. 80%, 14%, 78%. All in a matter of minutes.
I'm discharging fully then doing a full charge to see if it changes anything.
My Sensation never did this and the apps I have are the same. In fact I've installed less on the Nexus...

same problem
i also have this same problem, check this thread...
forum.xda-developers.com/showthread.php?t=1772177
no one gave me the correct cause or solution.i've done everything i can but no luck.if you get any correct cause or solution pls let me know.anyway I am planning to buy a new battery....

Phone dies at 5%....

So, this is a strange issue. When my phone dies, it will die when it says I have 5% of battery. Sometimes, it will die at a reported 4% instead. This randomly started one day. I got the 5% remaining notification, and suddenly, my phone shut down. Ever since, I can't get below 4%. I've tried to turn the phone on, but it acts like it is dead.
I'm not sure if it's just reporting the wrong percentage, or if it's actually dying early. I've tried flashing different ROMs, wiping everything, and no change. I've also used Battery Calibration to delete battery stats, with no change. I've had issues with other phones dying a little early, but battery calibration always fixed it, so I'm at a loss. Has anyone else experienced this? Is there anything I can try to fix it?

Definitely have this issue too. Dies at 4% strangely enough. Thought it suppose to croak at 0% lol.
Sent from my Nexus 6 using XDA Free mobile app

Its just not reporting the percentage properly. MIne does it too.

The phone will shut off when the *voltage* drops below a certain threshold, regardless of what the actual "percent left" indicates.

doitright said:
The phone will shut off when the *voltage* drops below a certain threshold, regardless of what the actual "percent left" indicates.
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Yep indeed.
There used to be tricks to get the % to show correctly but they weren't entirely good.

rootSU said:
Yep indeed.
There used to be tricks to get the % to show correctly but they weren't entirely good.
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In theory, the percentage display is supposed to calibrate automatically to the voltages... however it should be noted that the battery's *minimum* voltage does need to be programmed in at some point in the process, since the shutoff voltage can NEVER vary. Most likely, the problem of shutting off at 4-5% is a matter of "feel good" battery levels, much like some lingerie stores will label items with the "next size down" or "next cupsize up" to make women feel smaller and bigger in the areas they want. It basically bumps the full scale percentage display by an average of 2.5% UP, which can lead some less observant users to viewing that as a slightly improved battery life. Most people will plug in before it hits 5%, so won't even notice this.

So, basically, that's just how it is? I've never had a phone that was so off. And I still don't understand why it went down to 0% or 1% the first few weeks I had it. It's not an issue, it's just strange.

mine shuts down at 3% every time

GoogleAndroid said:
So, basically, that's just how it is? I've never had a phone that was so off. And I still don't understand why it went down to 0% or 1% the first few weeks I had it. It's not an issue, it's just strange.
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my nexus 5 died after going to below 1%. every time. i have a hard time believing thats just how it is in this case. chalk it up to yet another lollipop bug i would say...

indianajonze said:
my nexus 5 died after going to below 1%. every time. i have a hard time believing thats just how it is in this case. chalk it up to yet another lollipop bug i would say...
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My n5 shuts down at 1% every time on lollipop. Chalk it up as an n6 "bug" if there's chalking to be done.

I also have this issue and posted a similar thread about it a couple weeks ago. Given that any other device I've owned has been able to consistently reach 1% before shutting off, I think this is either a Lollipop bug or specific to Zthe Nexus 6.
I'm going to test it with my Nexus 9 and ask a buddy about his Moto X 2014 and report back.

Mine died at 9% sigh...

Download battery calibration app by nema from play store and calibrate your battery. Works for rooted devices only.
Sent from my GT-I9060 using XDA Free mobile app

ubuntu1306 said:
Download battery calibration app by nema from play store and calibrate your battery. Works for rooted devices only.
Sent from my GT-I9060 using XDA Free mobile app
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I remember having used that app to try to squeeze more life out of my Galaxy Nexus back in the day. It hasn't been updated since 2011...

j.bruha said:
I remember having used that app to try to squeeze more life out of my Galaxy Nexus back in the day. It hasn't been updated since 2011...
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That's the funny thing though, because it never did that. It just aligned shut off with 0%

Happened to me once so far, hit 4% and it shut down unexpectedly. I chalked it up to the kernel at the time, as I had flashed a new one the night before.

Maybe it's intentional?
The Nexus 4 could sometimes be a real pain to reboot if you let it go completely dead. I suppose it's possible Motorola/Google are preventing complete depletion of the battery.
Sent from my Nexus 6

Spectre Nine said:
Maybe it's intentional?
The Nexus 4 could sometimes be a real pain to reboot if you let it go completely dead. I suppose it's possible Motorola/Google are preventing complete depletion of the battery.
Sent from my Nexus 6
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Complete depletion of the battery would literally lead to an explosion upon recharge. That's why all lithium based batteries have an additional 10 - 20% below the battery chip shutdown voltage.
Also a phone that shuts down at 5% is more likely to automatically shut down than one that shuts down at 0% as its a little more unpredictable.

now i have the opposite problem. my phone keeps charging after it hits 100%. i use current widget, and watch it when im charging. and current keeps coming in after its at 100%. it will depend, but sometimes it could still be charging for a half an hour after it hits 100%. but then again, it could stay at 100% for 30-60 minutes after i start using the phone on battery again :silly:

simms22 said:
now i have the opposite problem. my phone keeps charging after it hits 100%. i use current widget, and watch it when im charging. and current keeps coming in after its at 100%. it will depend, but sometimes it could still be charging for a half an hour after it hits 100%. but then again, it could stay at 100% for 30-60 minutes after i start using the phone on battery again :silly:
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I remember the battery calibration trick on Tue original HTC desire. Turn the phone off and charge to 100 then reboot and charge again. It got the % out of whack and gave a false perception that the battery lasted longer as it stayed at 100 for much longer than it should do.