Database Users

Light turns green but battery is still charging

Hi,
I have a week old Kindle Fire and there is something bothering me.
When charging, the light turns green at around 94%. It continues charging to 100%, but its kind of odd.
Software is 6.2.1 rooted, but it did it when it was clean 6.2.1.
The problem is not with the charger, because it does it with all of my chargers.
Is it just mine? Any ideas why it is happening? Should I be concerned?

It does that sometimes to me and I'm running CM7. I don't think you should worry about it.

I'm not so sure it's a bug with the Kindle. It's been in most flavors of Android I've seen and my phone does it too.
I think it turns green around 90% or so because it thinks that's sufficient charge to take it off and use it normally without having to worry about running out real quick.

You're right. I just remembered it does that on my phone too!
Sent from my Kindle Fire using Tapatalk

It definitely does it on my Epic with CM7, but it was doing it on my stock Kindle before I installed CM7 on it.

how long takes to recharge the nook color?

hello to all friends i bought a nook color but i have problem with charging it takes more the six hour for full charge i am using nook color charger with micro usb and laptop for charging it is normal or some thing is wrong with my nook color thanx from all XDA froum
I am using the cm7 custom rom

afghan-gsm-mastermind said:
hello to all friends i bought a nook color but i have problem with charging it takes more the six hour for full charge i am using nook color charger with micro usb and laptop for charging it is normal or some thing is wrong with my nook color thanx from all XDA froum
I am using the cm7 custom rom
Click to expand...
Click to collapse
Your problem might be using the laptop as a power source. If you use the wall charger it should completely charge from 0 to 100 in about 4hrs
Sent from my NookColor using Tapatalk

thanx for ur replay
Can u tell ur nook color how long keeps the charge when i am watching the vedio every 3 minuts one parcent came down i mean if i watch vedio when all other comunication is off like wifi bluthuth and other comunication so if i continue watching vedio it will keep its charge 300 mints so what u friends think ? I think my battry have problem becuse i bought the nook color from my friend.
If my battry have problem i think i cant find it in afghanistan thanx friends

1. use the wall charger, it charges real fast. charging from a laptop with the included cable is not a good idea.
2. There are a lot of things you can do to improve battery life, most of which will require rooting and flashing a different ROM besides stock, just so you can get to the settings that make a difference. 5 hours of battery life on a stock NC playing videos is probably about right. I get 10+ hours of video out of mine with extensive tinkering. Far and away the biggest factor is the screen brightness, and beyond that, how bright, on average, is the video. I watch movies with brightness about 9-11%.

thanx mr 72 for replay
i am using cm7 custom rom
So what should i do to do beetter for battry life i am watching vedio in 0% brightness plz help i want to see vedio a bout 10 hours if poossibl thanx

Battery life will be affected by any radios, screen brightness, and CPU clock speed. The nook is not meant be charged over USB, but as you can see, it is possible. If you're looking to get a ten hours battery life, and you've purchased and rooted the wrong tablet. Id say nook color can get anywhere from 5-7 hours based on the above factors.

Mine takes 4 hours but my nook needs to be off to charge. If it is left on even with the screen off and saying charging, the battery is actually going down. Kinda stupid but whatever this thing is cheap greatness lol
Sent from my NookColor using Tapatalk

vulcan4d said:
Mine takes 4 hours but my nook needs to be off to charge. If it is left on even with the screen off and saying charging, the battery is actually going down. Kinda stupid but whatever this thing is cheap greatness lol
Sent from my NookColor using Tapatalk
Click to expand...
Click to collapse
Really? I that's interesting. I can charge mine in about seven hours with the screen on and in use.

AnnonymousFalcon said:
Battery life will be affected by any radios, screen brightness, and CPU clock speed. The nook is not meant be charged over USB, but as you can see, it is possible. If you're looking to get a ten hours battery life, and you've purchased and rooted the wrong tablet. Id say nook color can get anywhere from 5-7 hours based on the above factors.
Click to expand...
Click to collapse
NC can certainly get 10+ hours of battery life under normal use, and up to 17+ hours in my experience if you are using apps that require no wifi, low CPU and can tolerate low brightness settings.
Follow the guide in my sig.

mr72 said:
NC can certainly get 10+ hours of battery life under normal use, and up to 17+ hours in my experience if you are using apps that require no wifi, low CPU and can tolerate low brightness settings.
Follow the guide in my sig.
Click to expand...
Click to collapse
I suppose under the correct settings you could. Is this including sleep time or solely screen on?

AnnonymousFalcon said:
I suppose under the correct settings you could. Is this including sleep time or solely screen on?
Click to expand...
Click to collapse
That's "on" time.
17+ hours of actively reading ebooks (Moon+ reader in my case, black text on off-white background, no wifi enabled [was on a plane], brightness around 10-15%)
10+ hours of actively watching movies (MX Video Player, movie format varies from 720P to 480P DVDrip h264 and xvids, also no wifi, on a plane)
I say "+" because I quit using the NC and there was remaining battery, so I don't know how long it would have run if I let it run to zero. Check out my guide (in my sig) to see how I set mine up. There are no settings that compromise performance or utility.

I find charge time can vary pretty greatly. Last night i didn't get a full charge with the same settings that I had the night before.. aside from updating to a new nightly. Generally I can charge the device in less than 5 hours if the wifi is off and nothing is running.

I'm going to piggyback this forum as I have been searching over 40 min and this looks closest. Sorry ahead of time.
I also found it takes forever to chafe my nook. I have a droid raze and ourchase local for it so I'm using in my nook to shutbdown the wifi from 1am to 6.am. hmm I may change that to. 12:69 am. It will help with my issue but I still have the the following request.
Wifi seems to be eating up battery life. Does anyone know of a program that will auto off wifi if not used for say at min?
Also for other readers: I found a simple free program called connections (for the bionic connectivity issues) I use it on the nook when there seems to be an issue. I have a shortcut in app launcher so its avail in any program.
Any feedback welcome.
Sent from my NookColor using Xparent Cyan Tapatalk

Droidatar said:
Wifi seems to be eating up battery life. Does anyone know of a program that will auto off wifi if not used for say at min?
Click to expand...
Click to collapse
No, but if you leave the defaults, then wifi should be off while sleeping.
Or you can use the status bar pull-down in CM7 to turn it off when you are not using it.
However, I find that it doesn't make a huge difference.

Droidatar said:
[...] Wifi seems to be eating up battery life. Does anyone know of a program that will auto off wifi if not used for say at min?
Click to expand...
Click to collapse
I am using Juice Defender Ultimate on my NC running rooted B&N 1.4.1 for exactly this purpose, and it is working well. I also tried Green Power, but had problems with it.
JD is definitely overkill, since it's meant for device with more radios. You could also use Tasker and set it up to turn off wifi when the screen goes off.

bobstro said:
I am using Juice Defender Ultimate on my NC running rooted B&N 1.4.1 for exactly this purpose, and it is working well. I also tried Green Power, but had problems with it.
JD is definitely overkill, since it's meant for device with more radios. You could also use Tasker and set it up to turn off wifi when the screen goes off.
Click to expand...
Click to collapse
I looked at tasked but thought it would be overkill since I already have local set to turn off at 1am.
I will check out jd as I may use on my raze as well.
Thanks.
Sent from my NookColor using Xparent Cyan Tapatalk

mr72 said:
No, but if you leave the defaults, then wifi should be off while sleeping.
Or you can use the status bar pull-down in CM7 to turn it off when you are not using it.
Click to expand...
Click to collapse
Thanks, I did not realize the default for cm7 was off during sleep. I will test but I can swear upon wake it would be found I forgot and left the wifi on. I will check that setting.
Thanks again for your response.
Sent from my NookColor using Xparent Cyan Tapatalk

How to get stock battery longevity using JB?

Since I got my kindle fire last Christmas I've only used a rooted stock roms (whatever was latest). There would be weeks where I wouldn't touch my kindle then one day I would turn it on and still have battery left. It seemed the battery would never die, as if the stock kindle rom would go into some kind of super deep sleep.
Since going to JB I cannot reproduce this. Even if I don't touch the kindle it will run out of power in just a couple days. I went through and turned off all background sync and have it shut off wifi during sleep. Anyone have any tips to get the battery to last when the screen is off?

i have the same issue. the battery runs out so quickly on JB

my wifes battery life went to garbage when i flashed the JB rom on her kindle. She didnt really like the other ones i put on from the ics. but she likes the eye candy jb rom just that the battery life sucks

Ok, sounds like I am not the only one. I love everything about the JB roms except the battery life. I am sure we'll get there one day...

how about the ics roms??
which is the best ics rom??

None of the roms beyond stock give superior battery life. Only stock gives you several days of life. I charge my kindle everyday with daily use. If I want to conserve battery, I shut it off.
Sent from my Amazon Kindle Fire using xda app-developers app

Ixthusdan said:
None of the roms beyond stock give superior battery life. Only stock gives you several days of life. I charge my kindle everyday with daily use. If I want to conserve battery, I shut it off.
Sent from my Amazon Kindle Fire using xda app-developers app
Click to expand...
Click to collapse
The CM7 ROMs have better battery life than the Stock KF ROM.

Anyone know why this is? Did Amazon write some super special sleep code that nobody else can figure out or port to ICS or JB? Or is it just that there isn't enough interest in the feature among xda devs?
I definitely miss this in my KF running JB. It was awesome to be able to use the stock system lightly for weeks between charges. One less device's power needs to be slave to.
Of course, the additional functionality in these custom roms is worth it!
-S
Sent from my Galaxy Nexus using Tapatalk 2

shuddles said:
Anyone know why this is? Did Amazon write some super special sleep code that nobody else can figure out or port to ICS or JB? Or is it just that there isn't enough interest in the feature among xda devs?
I definitely miss this in my KF running JB. It was awesome to be able to use the stock system lightly for weeks between charges. One less device's power needs to be slave to.
Of course, the additional functionality in these custom roms is worth it!
-S
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
No. Gingerbread ROMs just have better battery life. Look at the CM7 ROMs. Really good battery.

shuddles said:
Anyone know why this is? Did Amazon write some super special sleep code that nobody else can figure out or port to ICS or JB? Or is it just that there isn't enough interest in the feature among xda devs?
I definitely miss this in my KF running JB. It was awesome to be able to use the stock system lightly for weeks between charges. One less device's power needs to be slave to.
Of course, the additional functionality in these custom roms is worth it!
-S
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
This is what I was wondering too. One thing I noticed with stock is that once I brought the Kindle out of sleep it would take a bit for wifi to come back. I wonder if Amazon wrote something to just shut everything off when the device sleeps. I tried replicating this with JB but couldn't get the same results.

I probably don't have enough data to say for sure, but it seems like there's more to it than just Gingerbread vs ICS/JB. My old phone was running CM7. Would it have lasted for weeks in sleep mode without a charge? Maybe it would have in airplane mode? I never tried it so maybe I don't know what I'm talking about. =)
Still, it seems like the stock KF is doing something special to deep sleep. I always was shocked how quickly I could connect to my wi-fi after instantly waking that thing up after a week without touching it and the charge level was still high. It made the KF have battery life comparable to my regular Kindle eReader, which is really saying something since I almost never turn on the wi-fi on my eInk Kindle.
To some extent this issue is less important now because I'm using the heck out of my JB Kindle Fire so I'm burning up battery from regular activity anyway. It is no longer a dust collector. I'm just curious if somebody knows the technical reason that these newer Android versions and/or non-Amazon ROMs are unable to achieve "deep sleep". Is it a lost cause and deep sleep is a thing of the past or do we simply need to wait for a developer who builds that custom JB ROM designed for arctic explorers and wilderness survivalists?
-S

shuddles said:
I probably don't have enough data to say for sure, but it seems like there's more to it than just Gingerbread vs ICS/JB. My old phone was running CM7. Would it have lasted for weeks in sleep mode without a charge? Maybe it would have in airplane mode? I never tried it so maybe I don't know what I'm talking about. =)
Still, it seems like the stock KF is doing something special to deep sleep. I always was shocked how quickly I could connect to my wi-fi after instantly waking that thing up after a week without touching it and the charge level was still high. It made the KF have battery life comparable to my regular Kindle eReader, which is really saying something since I almost never turn on the wi-fi on my eInk Kindle.
To some extent this issue is less important now because I'm using the heck out of my JB Kindle Fire so I'm burning up battery from regular activity anyway. It is no longer a dust collector. I'm just curious if somebody knows the technical reason that these newer Android versions and/or non-Amazon ROMs are unable to achieve "deep sleep". Is it a lost cause and deep sleep is a thing of the past or do we simply need to wait for a developer who builds that custom JB ROM designed for arctic explorers and wilderness survivalists?
-S
Click to expand...
Click to collapse
Your kindle fire should still be using deep sleep. The difference is that ics and jb are way more advanced operating systems. Therefore, there is more overhead power usage which equates to less battery life.
sent from my Kindle Fire running CM10 Jelly Bean

ortrigger said:
Your kindle fire should still be using deep sleep. The difference is that ics and jb are way more advanced operating systems. Therefore, there is more overhead power usage which equates to less battery life.
sent from my Kindle Fire running CM10 Jelly Bean
Click to expand...
Click to collapse
I don't think that is the issue.
On my HTC Sensation phone I get better battery life with ICS than I did with stock gingerbread.
I just think the deep sleep in the ics/jb kernel is not as optimized as the one in stock and it has power leaks.
Being more advanced operating systems they could consume more during active use (although I doubt it since ICS/JB use more hardware decoding/acceleration than Gingerbread and that means better battery life) of the device but deep sleep should be the same.

and yet, the question remains: why is it happening, and what to do about it?
I use SetCPU for such purpose in the meantime, with the profile to minimum CPU while with screen off

I think it's more of a kernel issue. The cm7 roms are fantastic for battery but lack all the latest goodies (and speed) built into ICS and JB.
Sent from my SCH-I535 using Tapatalk 2

My 2 cents:
Part of it is the kernel. Having been around longer, it's more mature in Gingerbread (CM7 and stock), having been refined/efficient over time.
The other part is features. There's simply more stuff in CM9 (ICS) and CM10 (JB). More stuff = more stuff tasking the system = higher battery drain. This is especially true for stock which is rather stripped-down compared to the more fully-featured custom ROMS.
I was able to squeeze a little more battery life out of JB by using Titanium Backup to "freeze" unnecessary apps such as anything referring to Bluetooth or voice control.
Sent from my Amazon Kindle Fire using xda app-developers app

U could try antutu battery saver.it manages ur cpu.
Sent from my Amazon Kindle Fire using xda app-developers app

Kindle Fire battery life post flashing ROM

Prior to flashing CM9 to my kindle my battery life on stock kindle fire was amazing. If I didn't touch my kindle for days it seemed as if my battery didn't even move. After flashing the rom the kindle is dying in two days with hardly any use. What can I do to extend the battery life to match what it used to be without reverting to stock?
This is what I currently have it flashed to:
gedeROM

I recommend battery widget pro. There is a free version as well.
Constant drain when the screen is off is irregular. This app should help you diagnose if you have constant discharging and what apps might be the culprit.
Sent from my CM10 KF w/ Tapatalk

You won't get the same battery life. You can try modoca rom... its the price you pay for cm9
Sent from my GT-N7000 using Tapatalk 2

I've been using the power bar widget to turn off wi-fi from my home screen, until I need it, and turn it off before putting the KF to sleep. That's helped mine a lot.

[Q] Battery drains very quickily, charges very slowly

My Nook is suddenly taking about 12+ hours to charge, with the OEM cable and plug. I couldn't get it to charge at all at first. I did finally get it fully charged, and it instantly jumped from 78% battery power to 30%. I had tried to clear the battery thing in recovery mode, which might have made things worse.
It doesn't appear to be going into sleep mode, either, as after the 30% jump, I turned off the screen, and the next morning, it was completely drained. Am I looking at a dying battery?
Using one of the latest CM7 nightlies. The problems started after a few weeks of it working fine with the new ROM.

How old is your nook and is it one of the version 1 or version 2 releases?...I had a version 1 doing the exact same thing. Luckly I was still under Warranty and was able to get a replacement, which is the version that was released mid may of 2011 I think. And it had the 5gb data 1 gb media partition...its bwwn working fine and I'm running the cm 7.2 kang w/ mirage kernel.
Sent from my R800x using xda app-developers app

Clear battery stats
d00med said:
My Nook is suddenly taking about 12+ hours to charge, with the OEM cable and plug. I couldn't get it to charge at all at first. I did finally get it fully charged, and it instantly jumped from 78% battery power to 30%. I had tried to clear the battery thing in recovery mode, which might have made things worse.
It doesn't appear to be going into sleep mode, either, as after the 30% jump, I turned off the screen, and the next morning, it was completely drained. Am I looking at a dying battery?
Using one of the latest CM7 nightlies. The problems started after a few weeks of it working fine with the new ROM.
Click to expand...
Click to collapse
Let it completely discharge (screen shuts off and Nook is non-responsive) and then charge it up fully. Any battery problems come after flashing and this method always fixes things.

brsingr said:
How old is your nook and is it one of the version 1 or version 2 releases?...I had a version 1 doing the exact same thing. Luckly I was still under Warranty and was able to get a replacement, which is the version that was released mid may of 2011 I think. And it had the 5gb data 1 gb media partition...its bwwn working fine and I'm running the cm 7.2 kang w/ mirage kernel.
Sent from my R800x using xda app-developers app
Click to expand...
Click to collapse
It's about two (?) years old and version 1. Doubt it's under warranty anymore.
unibroker said:
Let it completely discharge (screen shuts off and Nook is non-responsive) and then charge it up fully. Any battery problems come after flashing and this method always fixes things.
Click to expand...
Click to collapse
Trying that. Thanks.

d00med said:
It's about two (?) years old and version 1. Doubt it's under warranty anymore.
Trying that. Thanks.
Click to expand...
Click to collapse
Hmm ok, well let us know.
Sent from my R800x using xda app-developers app

Im having the VERY SAME prob., my nook is the version 1 with original and non-original Wall & Car charger, got it not to long after it came out, since no one posted more info i will try to have the battery dead as a knob and post the results
meantime any other ideas........ my prob started 2 months ago, been running CM7.2/CM9 Dualboot but gonna just change over to CM 7.2 now.
to run the battery fully down im going to just use the Nook Color Stock