Database Users

Battery indicator of HD is unreliable

Before first time reboot , my HD has 32%power
I tried to reboot 4 times..
32%>19%>25%>15%>22%
Or this is just my HD problem?

iamcrazyfire said:
Before first time reboot , my HD has 32%power
I tried to reboot 4 times..
32%>19%>25%>15%>22%
Or this is just my HD problem?
Click to expand...
Click to collapse
Why in the world don't you charge properly the battery before rebooting the device ?
My HD always reports the right battery values because I don't let the battery drain that much, if you wan't the battery to last many months please don't let it drain so close to 30%.

PJMDS said:
Why in the world don't you charge properly the battery before rebooting the device ?
My HD always reports the right battery values because I don't let the battery drain that much, if you wan't the battery to last many months please don't let it drain so close to 30%.
Click to expand...
Click to collapse
Because I want to test the battery consumption of HD .

Perform a complete discharge, recharge fully and then test..
Regards,
Carty..

PJMDS said:
Why in the world don't you charge properly the battery before rebooting the device ?
My HD always reports the right battery values because I don't let the battery drain that much, if you wan't the battery to last many months please don't let it drain so close to 30%.
Click to expand...
Click to collapse
Also some of us have no choice,
My device never lasts a whole day,
The battery consumption on the device is very bad.

iamcrazyfire said:
Before first time reboot , my HD has 32%power
I tried to reboot 4 times..
32%>19%>25%>15%>22%
Or this is just my HD problem?
Click to expand...
Click to collapse
I have the same, when I reboot my HD.
The last 20% drain very fast to 0%

zoro25 said:
The battery consumption on the device is very bad.
Click to expand...
Click to collapse
You should say: some applications I installed or functionality I have enabled are draining my battery badly. The device itself with the standard applications does not drain the battery in one day.
I agree that for example using wifi is a major drainer, but I do not beleive there are other devices out there that do it a lot better, like say continous wifi for two days...
Battery cosumption is always a problem in all devices. There is no single PDA out there that does not have a "battery" thread and how bad it is blah blah blah...
I can give you examples of devices that will be drained within a couple of hours, and the same devices being able to last for three weeks or more. It all depends on what you run and how you use it.

Your may be right or maybe not,
I think I'll un-install my apps and reinstall again with each new app being added one day at a time, to work out if any of them is killing my battery

zoro25 said:
I think I'll un-install my apps and reinstall again with each new app being added one day at a time, to work out if any of them is killing my battery
Click to expand...
Click to collapse
A "normal" application doesn't drain your battery. By a "normal" application I mean something that you open, work on, and close it again.
You have to pay attention to applications, which are running in the background and/or are polling every few seconds something.

nick007 said:
I have the same, when I reboot my HD.
The last 20% drain very fast to 0%
Click to expand...
Click to collapse
Hi,
the battery took long to reach 50%... about a day of heavy usage but after 50%, it took less den an hour of heavy usage to get to 10%. anyone experience this? or is my battery fautly? thanks.

i know that between soft resets my battery will change values, usually go up e.g. if its 40% when i reset when it reboots it will be 44%

i have the same issue here
but the battery last 2 days with me

angka8 said:
Hi,
the battery took long to reach 50%... about a day of heavy usage but after 50%, it took less den an hour of heavy usage to get to 10%. anyone experience this? or is my battery fautly? thanks.
Click to expand...
Click to collapse
Same here...on my device from 50 to 10% goes WAY faster than from 100 to 50%. To me it means crappy indicator. Must be a HTC problem, as my Prophet displayed similar behaviour.

This behaviour ("jumping" percentage after power-off) is completely normal, but the explanation would be very long.
Short version: What the battery % displays is in fact a translation of the voltage of the LiIon battery. When you switch off the device the voltage recovers a little bit, thus you get a higher % value when you switch it on the next time .. and which will fall rather rapidly until it stabilizes under the present load of the battery. Also the discharge curve of a LiIon battery is not completely linear.
-Valynor

Battery Charging Tips (Golden 100%)

Just want to share my experience of 'best' charging method that can maximize the battery life of my Nexus one.
Firstly, let me introduce my equip:
- Machine: Nexus one
- Rom: FRF91 Stock, Deodexed, rooted, busybox... (Geo411m)
- Kernel: intersectRaven's 2.6.35_AVS-925mV_CFS_20100802_1056.zip
- Control: SetCPU, Interactive: 245-960Mhz when on, and 245-245 when screen off
The key method of obtaining max. battery life is the 'GOLDEN' time from 100% drop down to 99%. Once the battery shows dropping from 100 to 99%, the dropping speed is quite stably fast onwards
So, how to retain 100% longer before dropping to 99%? Below are the steps that really work for me:
1) Charge the phone to green light, some where between 90% and 100% (say: 95%)
2) Disconnect USB charging cable
3) Turn off the phone
4) Connect USB charging cable and charge the phone, it should show orange light
5) Set a timer, remember to *ONLY charge the phone for around 20-25mins*
6) The concept is NOT to charge the phone until you get green light. In order words, you need to charge the phone from 95% for 20-25mins where the light is kept ORANGE with the phone turned off!!!
7) After 20-25mins, disconnect USB cable and power on your nexus phone
8) You are done and the battery should last longer before dropping to 99%
9) Time in step (5) depends, you need to trial-&-error
For my experience, I normally charge the phone before I sleep and disconnect the charger. In the morning when I get up, it usually shows around 95% of battery. Then, I power off the phone and charge it. And then I take breakfast, bla bla bla ~ and after around 20mins, disconnect the charger and go to work. The battery can retain 100% for around 30mins of continuous web browsing, facebooking... and when I reach my office, sometimes, the battery still shows 100% !!!
So, above is my experience of how to maximize the 100% retaining time.
Please feel free to try and share with us whether it really works for you

Great advice.
Personally, I can't really be bothered with going out of my way to be overly concerned about battery life. I don't play games on my phone -- that will change when Angry Birds is released for Android -- nor do I watch movies, and I don't really do too much web browsing. Sometimes I listen to music, but not often.
I can go 12-14 hours of normal use (mostly Twitter and text messaging) and that will put me around 45-50%. I'm never somewhere that I can't charge the phone if I need to; USB at work, regular charge at home, and a charger in the car.
All of these tips and tricks for extending battery life are neat, but why bother?

^ Well looking at your usage, and the plenty charging points, of course you dont care. However, some ppl browse a lot, play games, so every last inch of battery life means something.

I just keep spare batteries in my pockets =D

I will try your golden tips.. then I will write my thoughts.
I thank you for sharing.

Screwing up the battery meter does not get you more battery life, period, and I suspect your shenanigans here is doing that. The battery has a set capacity, it's not going to charge more than that.
The Nexus One and a lot of other modern phones with modern batteries DO NOT trickle charge, they charge to 100% and STOP charging. When the phone drops to a certain limit, it charges more. Repeat as long as it's on the charger. This is why you might see it "drop a few percent" when you pull the charger.

Yea this sounds like a huge placebo effect.

Well I just did this, been off charger for over an hour.. still 100% after over an hour and two reboots.
At 1378mAh right now, didn't get a reading straight after first reboot unfortunately.
I'm also trialing autorun killer. Disabled a free services I don't use.. seemingly increased startup time.

heya,
Don't you mean decreased startup time?
Cheers,
Victor

Yeah, that's what I mean.
victorhooi said:
heya,
Don't you mean decreased startup time?
Cheers,
Victor
Click to expand...
Click to collapse

Goonish said:
Well I just did this, been off charger for over an hour.. still 100% after over an hour and two reboots.
At 1378mAh right now, didn't get a reading straight after first reboot unfortunately.
I'm also trialing autorun killer. Disabled a free services I don't use.. seemingly increased startup time.
Click to expand...
Click to collapse
How do you figure out your mAh level? Spare parts only shows me mV.
Thanks
Sent from my Nexus One using XDA App

This is placebo. In the OP you even say after it finally drops to 99% it drops fast after that. It's because the phone wasn't at 100% all that time. It was giving you a false reading from messing with the charging pattern.
The best way I've found to charge the phone is to delete the battery stats, turn the phone off, and charge it until it's green. I get a great day of battery life with the phone that way.

Ryjabo said:
Great advice.
Personally, I can't really be bothered with going out of my way to be overly concerned about battery life. I don't play games on my phone -- that will change when Angry Birds is released for Android -- nor do I watch movies, and I don't really do too much web browsing. Sometimes I listen to music, but not often. I can go 12-14 hours of normal use (mostly Twitter and text messaging) and that will put me around 45-50%. I'm never somewhere that I can't charge the phone if I need to; USB at work, regular charge at home, and a charger in the car. All of these tips and tricks for extending battery life are neat, but why bother?
Click to expand...
Click to collapse
Totally agree...I just charge when & where necessary and never worry about it! Don't have the time and it seems to last long enough for me to work & play

I had already discovered this and was looking for a fool proof way but I guess you beat me to it. Happens when you traveling alot. For me, I have gotten over 1500mAh more than once..some times 100% would last me half a day too. So it's worth it, my question is whether or not this is bad for your battery? or long term battery life.

ram130 said:
I had already discovered this and was looking for a fool proof way but I guess you beat me to it. Happens when you traveling alot. For me, I have gotten over 1500mAh more than once..some times 100% would last me half a day too. So it's worth it, my question is whether or not this is bad for your battery? or long term battery life.
Click to expand...
Click to collapse
I'm fairly sure that the Milliampere-hour (mAh) is the capacity of the battery (the amount of energy it will store). How can you get "over 1500mAh" on a 1400 mAh battery? None of you are making any sense what so ever. You can't get more energy out of a battery by charging it a specific way. If I gave you a bucket that held 10lbs of sand and you filled it with 8lbs of sand and waited a few minutes then started filling the rest slowly, it wont hold more sand. This is nothing more than a placebo effect. The only way to get more time from a battery is to reduce the amount of consumption. The only way to do that is to use your phone less or make your hardware use the battery less such as undervolting your CPU. I tried for the longest time to explain to people that underclocking your CPU does absolutely nothing. If you're still running at the same voltage you're still consuming the same amount of power.

Stop messing around with the battery and the battery stats.
Could someone please use the phone until it goes off in the evening? What percentage is shown on the batteryicon when it goes off? 20% or what?

xPatriicK said:
Stop messing around with the battery and the battery stats.
Could someone please use the phone until it goes off in the evening? What percentage is shown on the batteryicon when it goes off? 20% or what?
Click to expand...
Click to collapse
Actually it's not a good idea to fully discharge the phone often.
Source: http://www.batteryuniversity.com/

dumbestcrayon said:
Actually it's not a good idea to fully discharge the phone often.
Click to expand...
Click to collapse
I know but once isnt often.
Btw we have some great battery threads here.. somewhere.. general or accessories forums..

xPatriicK said:
I know but once isnt often.
Btw we have some great battery threads here.. somewhere.. general or accessories forums..
Click to expand...
Click to collapse
Yeah, http://forum.xda-developers.com/showthread.php?t=669497

I have been using ultimate juice defender and battery life has doubled with usual usage. Maybe this can be considered as an alternative to longer battery life
Sent from my Nexus One using Tapatalk

Battery seems to drain fast when 50% or less, is this normal?

When my phone is fully charged or has 70 or 60% remaining battery it seems to drain as normal, around 2-5% over a 10 hour or so period...
However, I've noticed once the battery decreases below 50% it drains FAST, why?
Anyone else noticed this? Test it for yourselves, monitor the TIME it takes to decrease from 100 to 50% and then from 50% to 0.
Yesterday I forgot my phone in the car whilst going to work. It was turned on however it was sitting all day in the car.
Once I returned from work I was shocked to find the phone would not turn on.
At first I thought there was a problem or some kind of fault. Once I plugged in the charger it started to charge, the battery cut and the phone automatically turned off!
I remember the phone had around 48% battery remaining, no wifi or 3g or data turned on. It was simply idling...
So the question is HOW can the battery drain from 48% to 0% over a 10 hour period without being used???
Should my battery of been ANYTHING over 50% it would only lose a few percent...

Same thing for me. (Samsung Galaxy Note N7000 - stock Android 2.3.6)
Battery slowly decreases from 100% to ~50% and then ~2x faster.
I charged the note on my computer and then switched to the charger (at ~60% of charge).
I'm no expert of battery charging etc. but just remembered my iPhone 3GS discharging faster when charged on the computer than with the charger.
If it's the same for the note, some cells could discharge faster because charged on the computer.
Can someone confirm this (or not) ?
How did you charge your phone ?

boubou2k said:
Same thing for me. (Samsung Galaxy Note N7000 - stock Android 2.3.6)
Battery slowly decreases from 100% to ~50% and then ~2x faster.
I charged the note on my computer and then switched to the charger (at ~60% of charge).
I'm no expert of battery charging etc. but just remembered my iPhone 3GS discharging faster when charged on the computer than with the charger.
If it's the same for the note, some cells could discharge faster because charged on the computer.
Can someone confirm this (or not) ?
How did you charge your phone ?
Click to expand...
Click to collapse
Same thing happnd with me, and charging my phone thru electric charger..

So it seems this behaviour happens to several other Note users, why?
It's a problem knowing that having around 50% left in your battery will struggle to make it through the day with little to no use...

Have you people set the wifi to turn of while the screen is off? This is unnoticeable in the daily use, but increase the batterytime massively. The setting for this is hidden, you have to push menubutton while in the wifi-settings.

Here I thought I was only imagining things about the battery life dropping faster once it has reached 49% or less.

EarlZ said:
Here I thought I was only imagining things about the battery life dropping faster once it has reached 49% or less.
Click to expand...
Click to collapse
Haha, nice to know I'm not the ONLY one facing this bug...
I can only hope Ice Cream Sandwich solves this battery drain issue.

Hmm, i think i have the same problem, but i'm not sure. Will get back to this thread when i've investigated a little bit.

This may be a typical samsung issue.
I remember when i had the spica , the battery percentage lining in kernel was totally wrong. I think its done on purpose so you would feel like you have more battery life. 75 % of the battery drains slow. And the rest 25 super fast. Can be fixed within kernel.
Sent from my LG-P990 using Tapatalk

I believe its just a placebo effect. Battery usage always depends on so many factors its a pain to even consider starting looking for the issue.
Being on stock KK5 not rooted, i cannot report the same. I only see "fast battery drain" at the last 4-5%. If you feel its an issue, could you post the firmware version you are on and the battery stats graph just for reference?

Placebo or not its something I can definitely feel on my Galaxy Note.

EarlZ said:
Placebo or not its something I can definitely feel on my Galaxy Note.
Click to expand...
Click to collapse
When you get the chance, could you post the battery stats graph please? what we should see is a (lets say) 30 degrees angle and at about halfway it gets steeper.
I know its quite hard to demonstrate the issue, but if you lets say use wifi to browse the first 50% in text only sites and then visit youtube for the last 50%, it won't help the test.
A nice way to test it would be to charge it to 100%, then load up a long movie and repeat playing it till the battery is 2-3%. Then post the results.

roxxy said:
Have you people set the wifi to turn of while the screen is off? This is unnoticeable in the daily use, but increase the batterytime massively. The setting for this is hidden, you have to push menubutton while in the wifi-settings.
Click to expand...
Click to collapse
When the Wifi is disconnected, the 3G scanning will get on. Isn't that defeating the purpose?
Sent from my GT-N7000 using Tapatalk

Hey there!
I would suggest to load the battery 100%, plug it out, go into recovery and wipe battery stats.
I have to admit that I don´t know exactly what this workaround does, but I read about it in another forum...and it worked for me, my battery status is much more accurate now!

JulyDerek said:
When the Wifi is disconnected, the 3G scanning will get on. Isn't that defeating the purpose?
Sent from my GT-N7000 using Tapatalk
Click to expand...
Click to collapse
Wifi will continue to scan for wlans near it every second or so
Sent from my GT-N7000 using Tapatalk

I'm back. I've had the Diagnosis app running for the past hour, and i got some interesting results.

---Wiping battery stats does not help---, a full charge automatically causes battery stats reset.
I full charged mine with the electric charger after fully discharging it without turning it on.
This time i didn't notice any change in discharge speed between 100%-50% and 50%-0%.
Last time I charged the phone it was not fully discharged. Charged it from 30% to 50% then 50% to 75% on the computer, and 75% to 100% using electric charger.
It's just a supposition, but maybe doing several partial charges while using the phone makes the battery % information inaccurate (wrong battery stats?).
[Edit]In this case, wiping battery stats should show accurate battery %. [/Edit]

I had a similar problem, and I think it is to do with some incorrect scaling or measurement.
I was down to 28%, and it seemed to be draining fast even though I was not using it. I rebooted (I love how quick that is after my Arc was so slow). On restart it was at 17% ! The usage graph just did an instant drop.
I also had another occasion where it remained at 100% for 2 1/5 hours of use.
I assume some calibration issues caused the meter to read the battery wrong. I am turning off on the w/e overnight (when I do not need the alarm) to see if a slow (180 mA) charge while off will help. I may even get a decent alarm clock so I can turn the phone off at nights and charge. I spend too much time in the morning checking my email and reading news!

What is more consistent on mine is that when the battery drops to 9% or less the loss is like 1% per ~10-15% and this is with wifi/3g off, phone locked.

I'm back again. I've had some serious battery drain the last couple of days, but i noticed that Auto Sync was enabled. Once i deactivated it it got much better. Pulled the phone from the charger 9 hours ago and i'm at 90% battery left. I've sent some SMS, a few calls and that's about it, but it doesn't drain while it's in standby now, so i'm happy with it.

WTF my battery is insane... any ideas?

Ok so I can't figure this out. My battery is kind of "retarded" for lack of a better word.
I can charge it up to 100%, reset battery stats (even if I don't the same will happen)... then let it drain. It will drain insanely fast... I mean from 100 to dead in maybe an hour sometimes...
Then I go ahead and plug it into the charger... for just 15 seconds... when I take it off the charger and turn it back on it'll have another 50% battery life, sometimes more sometimes less....
It's almost as if the battery isn't reading correctly and then the phone can't detect how much battery is left so won't let me turn it on unless I plug it in really quick...
Tried another battery and that one does the same thing.... What in gods name could be going on...
and yes.. I searched... before I hear the hit the search 2000x times.

Here is the instructions from the ExROM thread, they worked perfect for me:
Code:
--> For battery life: I think that you have to calibrate your battery.
- Run the device down until it turns itself off.
- Turn it back on and wait for it to turn itself off again.
- Remove the battery for 10 seconds.
- Replace the battery, but leave the device off.
- Charge the device until full and then for another hour.
- Enter recovery and go to advanced -> wipe battery status. Apply it.
- Run the device’s battery down until it turns itself off.
- Turn the device on and charge for at least 8 hours.
- Unplug the device, turn off, then charge for another hour.
- Unplug the device, turn on, wait 2 minutes.
- Turn off again and charge for another hour.
- Restart and use as normal.

I shall try those but who knows...
I've literally been turning the phone on, it dies the minute it hits the lock screen. Plug it in now for just 3 seconds until it says VIBRANT, it will load up shut down.. have down this about 30 times...
I'm lost on how the phone has enough juice to boot and shi*.... it's driving me nuts doing this over and over and over.. oh wait just turned on again and it's at 5%. This is stupid....
lol i will post back after I try these instructions I guess....

You MUST calibrate your battery every time you see a weird behaviour or install a new kernel. You wrote that you tried another battery, so we can exclude a premature death of the battery.

are you able to get into RECOVERY mode and stay there without it rebooting? Or even Download mode?

yo i dont understand.. didnt a google employee go out and make a public statement that batterystats.bin has NOTHING to do with battery calibration, its only used to keep the data from the settings>battery use graph throughout reboots? In the same statement, i think i remember she told aandroid users NOT to let their batteries die and charge em full cause that will damage the batt.
Sent from a cell tower to the XDA server to you.

I made a nice detailed post about this a while back, it took a google employee for people here to believe.
https://en.wikipedia.org/wiki/Memory_effect
(Keep in mind, this applies to NiCad... but the effects are the same)
Bad news bro, your battery is bad. If you full discharge/recharge all the time, it will just hasten its death. Deep cycle charging when the battery is that far gone doesn't really have the same effect.
Try coaxing it back to life by recharging it to 100% then hitting the charger again at 75% a few times. This will increase the capacitance of the battery if there is hope of life. If it doesn't improve, its life is almost over.

younix258 said:
yo i dont understand.. didnt a google employee go out and make a public statement that batterystats.bin has NOTHING to do with battery calibration, its only used to keep the data from the settings>battery use graph throughout reboots? In the same statement, i think i remember she told aandroid users NOT to let their batteries die and charge em full cause that will damage the batt.
Sent from a cell tower to the XDA server to you.
Click to expand...
Click to collapse
Correct. According to her Calibrating does pretty much nothing except make you THINK your battery is better/worse/same.
Haxel said:
I made a nice detailed post about this a while back, it took a google employee for people here to believe.
https://en.wikipedia.org/wiki/Memory_effect
(Keep in mind, this applies to NiCad... but the effects are the same)
Bad news bro, your battery is bad. If you full discharge/recharge all the time, it will just hasten its death. Deep cycle charging when the battery is that far gone doesn't really have the same effect.
Try coaxing it back to life by recharging it to 100% then hitting the charger again at 75% a few times. This will increase the capacitance of the battery if there is hope of life. If it doesn't improve, its life is almost over.
Click to expand...
Click to collapse
thanks for the interesting read, i love reading things that the mind thinks as something for a weird reason.. Placebo effect etc.
Putting your battery down to an absolute 0% will do nothing but hurt your battery. This would have worked if we were still in the 80s and 90s, but these are Li-on batteries, they work differently and it actually hurts them.

Ok so I have RESTORED the battery...
Here is what was going on after further looking. I downloaded a battery stat/drain program to see what exactly was going on...
Under a load the battery mV will change drastically, then once it settles down the mV will actually rise making the % rise...
So I completely killed the battery, I mean dead.. Restarted the phone, plug it in for just a second.. I took it to the point that I killed the SOB battery.
I then charged it up, and while charging I would use the battery drain program. the mV would change drastically and I did this every 10%.
So far so good, the phone has been on for 4 hours now and i've only drained 8%... I will see how it continues.
I've also been resetting my battery stats not because I believe it relates the phone to the actual battery % but the % would fluctuate on the phone, and I thought the phone was saying "batterys dead don't turn on" kind of thing...

Ok. Again.
Here is a more in-detail article with a quick google.
http://www.atomicmods.com/Categories/QandA-Batteries.aspx
How long will these batteries last?
Lithium-based batteries have a lifetime of 2-3 years. The clock starts ticking as soon as the battery comes off the manufacturing line. The capacity loss manifests itself in increased internal resistance caused by oxidation. Eventually, the cell resistance will reach a point where the pack can no longer deliver the stored energy; although the battery may still contain ample charge. Increasing internal resistance is common to cobalt-based lithium-ion. The speed by which lithium-ion ages is governed by storage temperature and state-of-charge. Figure 1 illustrates the capacity loss as a function of these two parameters.
Click to expand...
Click to collapse
Although, there has been arguments for years about Li-ion "memory". Li-ions are not afflicted with the "memory" issues of other chemical types. What they are afflicted with is the inability to hold a consistent current under stress/load with age/oxidation (aging effect of the Li-ion batteries). This is where your battery sits. On the precipice of death. You may get another year or two out of it (if you're lucky.. really more like a few months) with a few correct charging cycles, but that is it.
Bringing a Li-ion to near 0 and back does not help the battery, it is 100% a placebo effect with short term gains at best. A common cause of your particular problem...
Lithium-ion batteries are often exposed to unfavorable temperatures, and these include leaving a cell phone in the hot sun or operating a laptop on the power grid. Elevated temperature and allowing the battery to sit at the maximum charge voltage for expended periods of time explains the shorter than expected battery life. Elevated temperature and excessive overcharge also stresses lead and nickel-based batteries. All batteries must have the ability to relax after charged, even when kept on float or trickle charge.
Click to expand...
Click to collapse
http://batteryuniversity.com/learn/article/how_to_store_batteries
I'm giving random googling as I know it's difficult to believe a random person on the internet. No two type of manufactured batteries are created/engineered the same, but I'm basing my statements of chemical composition and the basic fundamentals of the Li-ion battery tech.

younix258 said:
yo i dont understand.. didnt a google employee go out and make a public statement that batterystats.bin has NOTHING to do with battery calibration, its only used to keep the data from the settings>battery use graph throughout reboots? In the same statement, i think i remember she told aandroid users NOT to let their batteries die and charge em full cause that will damage the batt.
Sent from a cell tower to the XDA server to you.
Click to expand...
Click to collapse
+1
Sent from my SGH-T959 using XDA

Most of these battery calibration techniques sound like a practical joke.
the only way you'll truly get a perfect idea of what your battery life is going to be is to drop the phone in the toilet.
Sent from my SAMSUNG-SGH-T989 using XDA

Battery loses 22% after simple reboot

Usually I may lose one percent after a reboot if any at all. I rebooted my phone with 44% charge only to see 22% charge after the reboot. I then plugged it into the charger 20min later and it rose to 45% in about 2min. I could sit there and watch the charge climb one percentage every few seconds. Wtf is wrong with my battery, RMA time?
Phone is stock everything.

RMA. Your battery is wonky.

Is it normal for these devices to stay at a particular percentage for an extended amount of time and then all at once lose 3-5 percent at one time when the phone has just been unboxed? I've been through several RMAs and this happens every time. If so, does this stop over time?

dralways said:
Is it normal for these devices to stay at a particular percentage for an extended amount of time and then all at once lose 3-5 percent at one time when the phone has just been unboxed? I've been through several RMAs and this happens every time. If so, does this stop over time?
Click to expand...
Click to collapse
In my experience with android devices in general, they have issues like this when new, and when flashing new roms. Usually takes one or two charging cycles for the percentage to start acting normally.

I think the Nexus 4 just has a bad battery meter. If you do end up exchanging for a new one, I'd wait until a newer hardware revision is out and confirmed to fix it

estallings15 said:
RMA. Your battery is wonky.
Click to expand...
Click to collapse
it's not the battery at fault but I wouldn't consider it to be a huge deal unless it really bothers you. Your phone didn't really lose battery. phone just isn't reading the percentage properly.

do a couple of full charge and discharge cycle and it should probably be fine.

lunzi88 said:
do a couple of full charge and discharge cycle and it should probably be fine.
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I've had this problem a lot since going back to CM10.1. I'll be using my data connection for a bit and my phone will shut off, and when i power it back on (if i can w/o connecting to charger), my battery life is in the red. I also get battery drain when rebooting. Just now I had 50% battery when i booted into recovery and in the top right corner CWM says my battery is 3%. I reboot to system and my battery is at 6%... and RISING.
I will do the complete charging cycles as you suggested to others, and hope that is end of the massive battery loss i've been having.
Is their any benefit to using apps like Battery Calibration to remove batterystats.bin after a full charge, or charging cycles?
...and an off topic question, I've read a couple posts on the Internet saying they recommend you let your phone sit idle for 10mins after flashing a new custom ROM to get the best performance. Is this true or false in your opinion/experience?
Thanks.

dralways said:
Is it normal for these devices to stay at a particular percentage for an extended amount of time and then all at once lose 3-5 percent at one time when the phone has just been unboxed? I've been through several RMAs and this happens every time. If so, does this stop over time?
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Yes this happens to me also, especially in the morning after a full night's charging my phone loses battery percentage much faster and after few minutes its normal.
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