cut off by itself - HTC Rezound

Have anyone been having problem with there phone cutting off by itself
Sent from my ADR6425LVW using XDA App

I rarely use the normal phone, but with Skype its been disconnecting the call by itself ever since I switched to the Rezound. luckily it doesn't do it much but its a pain when it does happen.

Mine has turned off 2 times on me over 50% and said the battery was dead. I am trying to kill and retrain the battery right now. I have left it on since last night after the Ultimate fighter without being charged and I still have 40% so this is taking a while, lol.

I had one die in my hand in the store that I work at.

AtLemacks said:
Mine has turned off 2 times on me over 50% and said the battery was dead. I am trying to kill and retrain the battery right now. I have left it on since last night after the Ultimate fighter without being charged and I still have 40% so this is taking a while, lol.
Click to expand...
Click to collapse
FWIW, you don't train (or retrain) a Li-on battery. You can (sort of) "train" the operating system to report different charging statuses, but if you are purposely letting your battery charge to 0 and you do it very often, you are shortening its life.
.... my $.02

rfarrah said:
FWIW, you don't train (or retrain) a Li-on battery. You can (sort of) "train" the operating system to report different charging statuses, but if you are purposely letting your battery charge to 0 and you do it very often, you are shortening its life.
.... my $.02
Click to expand...
Click to collapse
Myth on phones (well smart phones), you can not actually drain the battery fully on these phones. The phone can not operate at voltages less than 3.5v and you can discharge a lithium ion battery to 3v. There is still at least 15%-20% more power left in the battery when the phone hits its 0 mark and shuts down.
And on the subject this thread has hit... What happened to people being polite? Politeness in the face of anger or adverse people (or just jerks or people you don't like) shows that you are a person that can handle a situation with a cool head. If you loose your cool... you have already lost.

Related

Don't understand

Ever since I rooted my fiances and my phone his battery life is so much better then mine.
Mine right now is at 92% and has 17hrs 30mins
His is at 88% and has 24hrs 48mins.
Is there any way that I can improve mine without having to buy a new battery?
We are both using kaos v39.
Thank you for any help.
Sent from my FroyoEris using Tapatalk
Have you tried calibrating the battery?
Look here for details: http://forum.xda-developers.com/showthread.php?t=816618
labnjab said:
Ever since I rooted my fiances and my phone his battery life is so much better then mine.
Mine right now is at 92% and has 17hrs 30mins
His is at 88% and has 24hrs 48mins.
Is there any way that I can improve mine without having to buy a new battery?
We are both using kaos v39.
Thank you for any help.
Sent from my FroyoEris using Tapatalk
Click to expand...
Click to collapse
The battery % also isn't necessary accurate.
The phone uses a calculation of voltage (as closely as it can), temperature, and activity, to determine the %. Largely, the figure is just based on voltage.
Sometimes, when your phone is charging, it can say 83%, but be at a solid 4200mV (4.2 volts). It's probably not going to charge any further. If you power the phone off, the light will probably turn green (showing you that it's charged). Then if you boot it back up, the battery % might read 100%.
Is it 83%? Is it 100%? Clearly, in the 2 minutes it took you to turn your phone off and on, it didn't gain 17% battery.
The difference between 88% and 92% could be temperature, voltage of the particular battery at the moment, who just used their phone more in the past 2 minutes before checking, and (due to all the variables) practically 'dumb luck'.
What you really will see is if you let them go for a very very long time (until they get to 0% and auto-shut off), you'll find that whoever had their screen on more often (maybe whoever does more texting), or whoever has more 3g internet doing things in the background (if one of you has an email app that checks email every 10+ minutes, keeping the phone awake, and moving data), or whoever works in a workplace with worse reception (that will eat battery very quickly, as the phone uses battery to get 'louder' so that the cell phone tower can 'see' it), will have their phone hit 0% more quickly.
The difference between 88% and 92% may actually be nothing. It's just your phone's 'guess' at how much battery is left. His phone's 'guess' is different, because the variables going into the calculation are totally different for a handful of minor reasons.
I wouldn't sweat it.
If yours hits 10% when his is still at 40 or 50%, with similar usage, yeah, that's something to pay attention to.
But the battery % isn't THAT accurate, to even sweat 4%.
I promise.
labnjab said:
Ever since I rooted my fiances and my phone his battery life is so much better then mine.
Mine right now is at 92% and has 17hrs 30mins
His is at 88% and has 24hrs 48mins.
Is there any way that I can improve mine without having to buy a new battery?
We are both using kaos v39.
Thank you for any help.
Sent from my FroyoEris using Tapatalk
Click to expand...
Click to collapse
Alot of widgets can also change your battery life as well. Especially things like Facebook, location based weather, latitude, etc. Ones that are always updating and using data or gps.
pkopalek said:
The battery % also isn't necessary accurate.
The phone uses a calculation of voltage (as closely as it can), temperature, and activity, to determine the %. Largely, the figure is just based on voltage.
Sometimes, when your phone is charging, it can say 83%, but be at a solid 4200mV (4.2 volts). It's probably not going to charge any further. If you power the phone off, the light will probably turn green (showing you that it's charged). Then if you boot it back up, the battery % might read 100%.
Is it 83%? Is it 100%? Clearly, in the 2 minutes it took you to turn your phone off and on, it didn't gain 17% battery.
The difference between 88% and 92% could be temperature, voltage of the particular battery at the moment, who just used their phone more in the past 2 minutes before checking, and (due to all the variables) practically 'dumb luck'.
What you really will see is if you let them go for a very very long time (until they get to 0% and auto-shut off), you'll find that whoever had their screen on more often (maybe whoever does more texting), or whoever has more 3g internet doing things in the background (if one of you has an email app that checks email every 10+ minutes, keeping the phone awake, and moving data), or whoever works in a workplace with worse reception (that will eat battery very quickly, as the phone uses battery to get 'louder' so that the cell phone tower can 'see' it), will have their phone hit 0% more quickly.
The difference between 88% and 92% may actually be nothing. It's just your phone's 'guess' at how much battery is left. His phone's 'guess' is different, because the variables going into the calculation are totally different for a handful of minor reasons.
I wouldn't sweat it.
If yours hits 10% when his is still at 40 or 50%, with similar usage, yeah, that's something to pay attention to.
But the battery % isn't THAT accurate, to even sweat 4%.
I promise.
Click to expand...
Click to collapse
Thank you that makes me feel a lot better. I was starting to think something was wrong with my phone but your explanation tells me that nothing is wrong. =) Thank you for taking the time and patience to explain it to me. I didnt realize how little it could take to eat the battery down.

Full Drain the Battery?

There seems to be a debate on this topic as to whether you should do a FULL drain on your battery and I wanted to know what people's thoughts were on this in this forum.
I've used my phone twice now to the point where it has auto powered down on it's own. I will then hit the 'Power' button to ensure that battery is truly at 0% (the capacitative buttons blink for a second to confirm that I've hit the power button but there is no more juice left to turn the phone on).
I will plug into the wall charger and allow it to charge for 4 hours (usually around 4 hours, I'll check back to see and hit the power button and the onscreen battery display will show 100% charged).
I will unplug my phone, power on and keep using until the phone fully drains and powers off on it's own again before repeating this cycle.
However, others have stated that this is NOT necessary for Lithium Ion battery and can actually damage the circuitry of the battery? I've always been under the impression that you need to do a complete & full battery drain for lithium ion batteries at least 3 -5 full cycles/times before the battery has been conditioned/optimized for capacity.
Maybe I'm wrong...after all I'm coming from a G1 and this practice helped my atrocious battery life on that dinosaur!
If this is wrong, when should I be plugging my phone back in to charge? When it gives me the first warning to charge in (battery level turns orange - I assume this about 20% battery left) or on the "critical" battery warning when the battery icon in the notification panel turns red (assuming this is about 10% battery left)?
from what I've read in the past, letting your phone drain completely down until it shuts itself off is not good for the battery. I could be wrong but thats what I've read
nyydynasty said:
from what I've read in the past, letting your phone drain completely down until it shuts itself off is not good for the battery. I could be wrong but thats what I've read
Click to expand...
Click to collapse
Yeah, I've heard both sides and I've conditioned my battery for the G1 because it seemed to drain faster if I plugged it into charge when there was 30% or so still left.
Well, I've done two complete cycles so I guess I'll just try recharging when it hits the red mark next time.
When you plug in to charge? Orange, red or whenever to top off?
i plug my phone in when i go to bed. I dont care what the battery is at. I also charge it while i'm at work so when I leave, its around 90-100%. My battery rarely reaches red.
nyydynasty said:
i plug my phone in when i go to bed. I dont care what the battery is at. I also charge it while i'm at work so when I leave, its around 90-100%. My battery rarely reaches red.
Click to expand...
Click to collapse
LOL - that would prematurely killed my battery capacity on the G1! I went thru two batteries before I started draining all the way down. Made a difference between 4-6 hours and 6-10 hours.
Seems like this phone doesn't need to do that tho.
But what're you getting on average for battery life and display on time then?
nyydynasty said:
i plug my phone in when i go to bed. I dont care what the battery is at. I also charge it while i'm at work so when I leave, its around 90-100%. My battery rarely reaches red.
Click to expand...
Click to collapse
I do the exact same thing. First with my Captivate and now with the SGS2 and the battery life on my captivate held pretty much exactly the same charge for the entire 15 months I used it. The battery on this SGS2 seems to last about 150-175% of the Captivate battery under the same conditions. I just came back from a week on the road where I spent 9-12 hours a day away from a charger and was using my phone constantly all day long and would get back to the hotel room with 30-40% battery left. Considering I was listening to music, playing plants vs zombies and sending and reading push email constantly throughout the day I am very satisfied with the battery life on this phone. I've never done any kind of conditioning or special battery maintenance.
DefTaker said:
LOL - that would prematurely killed my battery capacity on the G1! I went thru two batteries before I started draining all the way down. Made a difference between 4-6 hours and 6-10 hours.
Seems like this phone doesn't need to do that tho.
But what're you getting on average for battery life and display on time then?
Click to expand...
Click to collapse
i stopped looking at my battery stats a long time ago. I'll peak in there once in a while but I dont really care what the stats show because I'm always around a charger. As long as I get through 12 hours or so without charging, i'm happy.
Some devices need a full drain cycle to properly calibrate the fuel gauge - ours does NOT.
Lithium ion batteries don't like deep discharging - in fact discharging them too much will permanently damage them (fortunately, all batteries sold to end users have built-in protection chips to prevent overdischarge - but do you REALLY want to rely on that chip?)
Similarly, they don't like charge being forced into them - so don't "bump charge". (Bump charging is removing and immediately reinserting the charger when the phone says charging is complete.)
For long-term storage, store them at around 50% capacity if not being used. LiIons that are stored at 100% charge lose capacity MUCH faster than ones stored at 50%.
A Li-Ion that has been sitting for a long time (months...) will develop a passivation layer that can be detrimental to performance - a few charge/discharge cycles will fix this. You don't need to do a full discharge/recharge - probably even from 90 to 70 and back up a few times should be fine.
Entropy512 said:
Some devices need a full drain cycle to properly calibrate the fuel gauge - ours does NOT.
Lithium ion batteries don't like deep discharging - in fact discharging them too much will permanently damage them (fortunately, all batteries sold to end users have built-in protection chips to prevent overdischarge - but do you REALLY want to rely on that chip?)
Similarly, they don't like charge being forced into them - so don't "bump charge". (Bump charging is removing and immediately reinserting the charger when the phone says charging is complete.)
For long-term storage, store them at around 50% capacity if not being used. LiIons that are stored at 100% charge lose capacity MUCH faster than ones stored at 50%.
A Li-Ion that has been sitting for a long time (months...) will develop a passivation layer that can be detrimental to performance - a few charge/discharge cycles will fix this. You don't need to do a full discharge/recharge - probably even from 90 to 70 and back up a few times should be fine.
Click to expand...
Click to collapse
what about short charging during the course of the day? For instance, while I'm at work, I like to plug it in for a bit and then use it off the charger. Then before I leave, I charge it again for a bit. Do you think thats okay to charge the phone for short ~1 hour bursts?
No, the battery itself doesn't do well with deep discharges, but every device with one has circuitry to manage this and keep it from happening. The phone will shut off before the battery reaches a critically low discharge state. Just as it will cease charging before it blows up. Just because the phone shuts off does not mean that the battery is too low.
Assuming the phone has the proper cutoffs, it's not really any different to do two discharges to 50% or one to 100%. There have been studies that say leaving it on a charger is bad, doing two 50% cycles is worse than one 100%, etc. I've always just trusted that the phone manufacturers design the battery monitor and control circuits correctly and not worry much about it. And I've never had to replace a battery yet and always get acceptable life.
It's lithium ion, not nickel cadmium.
Full drains are bad for lithium ion.
Sent from my SGS II
nyydynasty said:
what about short charging during the course of the day? For instance, while I'm at work, I like to plug it in for a bit and then use it off the charger. Then before I leave, I charge it again for a bit. Do you think thats okay to charge the phone for short ~1 hour bursts?
Click to expand...
Click to collapse
That's the best way to charge it.
Sent from my SGS II
MikeyMike01 said:
That's the best way to charge it.
Sent from my SGS II
Click to expand...
Click to collapse
that makes me even more glad that its what I've been doing forever - lol
thanks
lithium ion batteries dont like being under 30%. and they also dont do well if they are kept at 80 percent or above all the time. for longest battery life don't just let it sit on the charger all day after it fully charges.
I agree with Mikey here.
Also, batteries take charging current better (less wear) at lower states of charge. That's why I put a variable-current charging algorithm into my Infuse kernels (charginghacks branch on github)
800 mA at low voltages (200 above stock), dropping to 550 near the end (50 below stock).
Unfortunately, charginghacks is likely not going to be possible with our hardware. One of the differences between the I9100 and I777 is a different battery charger circuit - ours is far less flexible.
Entropy512 said:
I agree with Mikey here.
Also, batteries take charging current better (less wear) at lower states of charge. That's why I put a variable-current charging algorithm into my Infuse kernels (charginghacks branch on github)
800 mA at low voltages (200 above stock), dropping to 550 near the end (50 below stock).
Unfortunately, charginghacks is likely not going to be possible with our hardware. One of the differences between the I9100 and I777 is a different battery charger circuit - ours is far less flexible.
Click to expand...
Click to collapse
This phone actually charges with the screen on though, so it's not like the Infuse where the battery would drain with the screen on and the phone charging.
MikeyMike01 said:
This phone actually charges with the screen on though, so it's not like the Infuse where the battery would drain with the screen on and the phone charging.
Click to expand...
Click to collapse
Infuse would charge with the screen on - but not if the screen was on AND the CPU was cranking.
(worst-case was navigation at full brightness - and I've seen reports that the I9100 also has the same problem.)
Entropy512 said:
Infuse would charge with the screen on - but not if the screen was on AND the CPU was cranking.
(worst-case was navigation at full brightness - and I've seen reports that the I9100 also has the same problem.)
Click to expand...
Click to collapse
When web browsing, playing a game, or other general use late at night I'd plug the Infuse into the charger. It would still drain. Doing the same on the SGS II and it at the very least maintains it's battery level, so it's a drastic improvement over the Infuse.

[Q] Why do soo many people recommend something soo bad for your battery?

One of the worst things you can do to a lithium battery is discharge it completely. They don't suffer from "memory" yet every time someone here in the forums complains that they are getting crappy battery life the instruction to discharge and recharge to 100% before clearing stats pops up.
For those who are interested here is an article that explains in detail.
batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
My main question- Is there some function in android that looks at the maximum depth of discharge level of the battery or is it that most people don't understand the characteristics of L-ion and confuse them with those of Ni-Mh or Ni-Cad?
I want to know because if I need to completely discharge to get better perfomance, despite the reduction in charge cycle lifetime, I will do it but only infrequently.
I've only let my battery discharge completely once, and it wasn't on purpose. From the posts I see here I think I get above average battery life. About 18 hours miui before I go for the charger and on 2.2 roms I'd get 20 hours and still have 40% or so to go. So no I don't think completely discharging your battery does anything for battery life.
Sent from my T959 using XDA App
I have never run mine down completely. Gotten it to about 6% but that was because I was fighting ROM flashing problems. I usually call 25-30% enough for me and plug in then. I am also getting 30 hours out of my 2.2 with a good deal of use. I used to have a Motorola and their batteries are total crap. If you EVER let it get down below 10%, it took some real work for it to charge correctly and boot up. Even as much as a hardware mod where I have had to cut the wires on a USB charge cord and charge it rigged up with the wires pressed against the battery and prongs in the phone. Very dangerous, but worked for a last resort.
Discharging the battery is not for the sake of the battery,but more so for the ROMs data and how it acquires the battstats usage. I only run it up and down and clear stats when flashing a new ROM, but I do use my phone moderate to heavy daily and have had great success in battery life the way I calibrate it.
The solution I think is to use a larger capacity battery and regulate it to narrower window of operation never fully charging or discharging.
The fastest killer though seems to be heat.
I have read several times that your phone does not fully discharge the battery...that there is still a minimal amount of charge,not enough for the phone to opperate but enough to not damage the battery when it shuts down
Maybe the batterystats file can be saved after being calibrated once and then restored after every wipe oor flash.. that would save some time aabd according to you guys, batt life too
Sent from a cell tower to the XDA server to you.
I've only ever calibrated my a few times and only after flashing a new rom. I never run my battery down after resetting the stats. I just use my phone as I normally do. My understanding of calibration is that it's not about squeezing more life out of the battery despite what most people think but of getting a more accurate measurement of the battery's actual charge. Also while it's true that the phone will shut of before the battery is completely discharged damaging the battery, allowing the battery charge to drop that low shortens your battery's life and decreases the amount of charge your battery can hold.
What gets me is I also read somewhere that for optimum battery life you should keep your battery level somewhere between 70%-40%. Of course that doesn't stop me from charging my phone to 100% everyday. I don't remember where I found that article but I'll post a link if I can find it again.
The reason this bad advice about completely discharging your battery persists is probably the same reason people keep recommending automatic task killers.
batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
ok, ok ill volunter, ill watch porn till my battery"discharges" At least my log will be interesting
radiohd said:
One of the worst things you can do to a lithium battery is discharge it completely. They don't suffer from "memory" yet every time someone here in the forums complains that they are getting crappy battery life the instruction to discharge and recharge to 100% before clearing stats pops up.
For those who are interested here is an article that explains in detail.
batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
My main question- Is there some function in android that looks at the maximum depth of discharge level of the battery or is it that most people don't understand the characteristics of L-ion and confuse them with those of Ni-Mh or Ni-Cad?
I want to know because if I need to completely discharge to get better perfomance, despite the reduction in charge cycle lifetime, I will do it but only infrequently.
Click to expand...
Click to collapse
Discharging the Battery & Running the Battery Dead is 2 Different things!
We recommend running the battery dead ( Phone Shuts Off ) & recharging while off to train the Android OS from Full > Empty..
Running the Phone until Dead is not Going to hurt the Battery in anyways shape or form despite what you may think or read!
The Reason is, the battery is never fully Discharge & still holds Voltage.. The Calculations of Charged / Dead is at the Kernel Level, so even when dead it still has a 3.4v still or roughly..
As long as the kernel isn't tampered with, discharging the battery via the Phone will never hurt the battery period!
Now, Based on the link you posted you would have to run the battery down past the safe discharge point.. Via some other means of killing the battery, other than using the Phone.
To help ease your mind, Remember this:
~ Charge levels is controlled by the kernel
~ Even when Phone powers off, there is still plenty of charge in the Phone's Battery
~ Battery is never Fully charged, as this also hurts lithium batteries
Roughly every Android kernel does not let lithium battery get below 3.4v and at most 96% charged.
Hope this helps,
~Eugene
If you are still concerned wait until your phone turns off and stick your battery on a meter. You will see there is still power left in it...
My original battery that came with the phone got great life, then couple of months later it was discharging in like 2-4 hrs(froyo), so I called, they sent another one free...5-6 months later that one started doing it as well, so I pulled out the old one from the drawer, it powered on at like 85% ! and I was getting crazy ass life out of it on miui over 30 hrs one time...now that one is acting up again, so I'm going to try to swap again..lol...maybe there's something to not using them for a while...
I've used diff roms and combinations of draining/recharging...calibrating, not calibrating...it's always different results..honestly I don't think there's any rhyme or reason to it other than the fact that many vibrants have diff hardware and there will always be some weird quirk on a per user basis...
As far as hurting it by draining it all the way, I hardly think that's the case seeing as with both batteries I've always let it run down...not on purpose but there has been many many times I've plugged in at 1% or had to power back on because it died...charged it up and got 20-30hrs no prob..usually issues come up when flashing a new rom...
i think it all comes down to luck of the draw. ive had my vibrant since launch day, and i still manage great battery life. my battery is actually stamped 7-02-2010. every 2 weeks or so ill drain the battery completely, turn it back on and allow itself to die again, and finally allow it to fully charge overnight or 4 hours. i usually get a good 7-8 hours of constant use on cm7, or over 24hours if let on standby.
im still debating if i want to grab an epic 4g touch battery as well to increase it even more.
qpinto said:
im still debating if i want to grab an epic 4g touch battery as well to increase it even more.
Click to expand...
Click to collapse
what's this about?
Epic 4g batteries are 1800 and fit in our vibes.
Dr.Stainedglove said:
what's this about?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1262035
in there they tested in a store since the epic 4g touch battery fit into a regular epic 4g, if it would fit into a vibrant. only thing is you have to put the battery in facing inside, and it fits and works 100%
Yeah the Epic 4G batteries fit in our Vibrant's. You can buy knock-off one's (that work well) for 19.99$ US! Here's a thread about it...
http://forum.xda-developers.com/showthread.php?t=1316492
Epic touch battery for the win. I've been rocking it for a few weeks. I was on miui and getting 14-16hrs. I recently went back to froyo and yesterday I got 12hrs off of a 67% charge.
Sent from my SGH-T959 using xda premium
dont know if people have seen this article but i thought it was pretty interesting about the battery stats file not actually needing to be deleted...
http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
jonen said:
dont know if people have seen this article but i thought it was pretty interesting about the battery stats file not actually needing to be deleted...
http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
Click to expand...
Click to collapse
Lol one of the biggest flukes in our forum haha.. people will harm their battery to calibrate it and it doesn't even do anything ...
Thank god I only calibrated once
sent from the xda app on my android smartphone.

Droid x2 battery life

My wifes x2 display is using 59% battery. Weve changed the timeout to 30s and brightness down really low. But her. Battery still dies very fast. Its only 2 months old. We ha e disabled bt wifi and gps. Any other tips?
One other question. When her phone dies she cannot plug it in and turn it on or it gets stuck on the motorola logo. Qe have to wait till droid boot animation to plug it in. Any ideas?
Sent from my DROID4 using xda premium
If you plug it in from off do you see the charging screen? Try plugging it in and holding the power button simultaneously if the phone is off.
Is the phone rooted and romd or stock?
Is it running 2.3.4?
Sent from my DROID X2 using xda premium
Its running 2.3.4 rooted but not romd. I had the phone for about a month and had no issues with it. However i never allowed it to die. Shes not a heavy user but my main concern is why the display uses 59% where my d4 uses only 26% on the same settings as hers. Can i unroot the phone in case i have to return it under warranty?
Sent from my DROID4 using xda premium
when the phone dies you need to plug it in and wait until the battery on charge only screen shows at least 10% before the system will, allow you to turn it on
if you have BSR installed tho, as soon as it dies you can plug it in and when BSR comes up you can just choose reboot system now.
and the reason you d4 uses less battery on screen it's because I believe it is an amoled screen, which consumes much, lower power levels than an LCD screen
Sent from my DROID X2 using Tapatalk
Have you tried recalibrating the battery too?
No. How do i do that? Thanks
Sent from my DROID4 using xda premium
First, make sure the battery is completely charged, then boot into custom recovery (BSR). Go to advanced options (towards the bottom of the list) and there should be an option that says 'recalibrate battery'. Once you recalibrate it, reboot back into android. I usually always let my battery run completely out after doing a recalibration before recharging it after a re-cal. If you find on your first discharge after recalibrating that your phone tells you you've only got 20% left and it would normally only last an hour before, depending if it needed the re-cal it may last 2 hours. Those numbers are just hypotheticals. Point is, recalibrating lets android know it's for sure 100% full at the start, but it doesn't necesarily know the end point until it gets there by allowing a full discharge. Also, the lithium batteries our phones use do best when recharged around 15-20%. It's actually bad to let them completely discharge all the time. And if you have multiple batteries and one may be sitting for a while, it's best to store them between 30-40%. Let me know if you need any more clarification.
Im going to try that thank you
Sent from my DROID4 using xda premium
More importantly, if you are already rooted and such, why not run a custom ROM? CM7 and/or Eclipse should give you a good boost in battery life. Running CM7 my standard battery lasts 18-24 hours with light ish usage. And that's with my original battery from when the DX2 first came out. I also have an extended battery I am running right now, but don't have data on that one yet since it's still discharging now. I do know that swapping between batteries of different capacities pisses android off sometimes though lol. Aside from custom roms, there are scripts and apps/software-based mods that can help it significantly too. Namely, wifi vs 3g usage, turning 3g data off when your phone is not being used, etc... I started off with an original DX but VZW gave me a free upgrade to DX2 after my 6th warrantied DX. I miss Rubix's ROM and being able to overclock and undervolt... My DX would last 2+ days sometimes when I had it all dialed in.
Its now my wifes phone. Since she already has had time getting used to stock i doubt she'll let me put a rom on it lol. But ill try
Sent from my DROID4 using xda premium
Well fortunately you've got a Blur-based and AOSP-based option for it. I know what you mean though, my gf likes her Sense-based UI, but had to give it up for a semi-funtioning Eris. I think she is getting a Bionic sooner than later... HTC is garbage.
Maleko48 said:
First, make sure the battery is completely charged, then boot into custom recovery (BSR). Go to advanced options (towards the bottom of the list) and there should be an option that says 'recalibrate battery'. Once you recalibrate it, reboot back into android. I usually always let my battery run completely out after doing a recalibration before recharging it after a re-cal. If you find on your first discharge after recalibrating that your phone tells you you've only got 20% left and it would normally only last an hour before, depending if it needed the re-cal it may last 2 hours. Those numbers are just hypotheticals. Point is, recalibrating lets android know it's for sure 100% full at the start, but it doesn't necesarily know the end point until it gets there by allowing a full discharge. Also, the lithium batteries our phones use do best when recharged around 15-20%. It's actually bad to let them completely discharge all the time. And if you have multiple batteries and one may be sitting for a while, it's best to store them between 30-40%. Let me know if you need any more clarification.
Click to expand...
Click to collapse
Or you can download the app battery calibrator (haar a red Android as the pic) and follow the directions
Sent from my MB870 using xda premium
letting your battery die completely is not recommended no matter what you've been Told
Li-on batteries were designed to last longer when you don't let it die completely
start charging around 15%-10%, 5 is pushing it cuz its most likely gonna shut down before you see 5, trust me, it's bad for the life of tour battery to let it drain completely, just Google Li-on battery life, recommendations and u can read for yourself lol
ashclepdia said:
letting your battery die completely is not recommended no matter what you've been Told
Li-on batteries were designed to last longer when you don't let it die completely
start charging around 15%-10%, 5 is pushing it cuz its most likely gonna shut down before you see 5, trust me, it's bad for the life of tour battery to let it drain completely, just Google Li-on battery life, recommendations and u can read for yourself lol
Click to expand...
Click to collapse
Yeah I know you're not *supposed* to let them discharge all the way but sometimes you have to and sometimes it just happens. For instance, my extended battery that I just did a re-cal on the other day has been sitting at 1% for the past few hours and is currently reading 1day 12 hours of uptime. (I shut it off the other night though and it is still discharging from its initial charge that I did the re-cal on.) So if I would have recharged it at 5% or whatever, I would be losing a decent chunk of available battery because android thought it was empty when it really wasn't, thus skewing the battery's voltage window.
Maleko48 said:
Yeah I know you're not *supposed* to let them discharge all the way but sometimes you have to and sometimes it just happens. For instance, my extended battery that I just did a re-cal on the other day has been sitting at 1% for the past few hours and is currently reading 1day 12 hours of uptime. (I shut it off the other night though and it is still discharging from its initial charge that I did the re-cal on.) So if I would have recharged it at 5% or whatever, I would be losing a decent chunk of available battery because android thought it was empty when it really wasn't, thus skewing the battery's voltage window.
Click to expand...
Click to collapse
that will only happen with extended batteries or one of those "Chinese", aftermarket batteries
regardless, battery life of Li-on batteries will decrease from letting it completely discharge, the more times you do it, the less your battery health will be.(BTW when do you "have to" let it discharge completely? , I'm not "calling you out or trying to "make you look stupid" or anything, I'm just curious what you meant by that?)
when I say 15-5% don't look at it as when Android reports that percentage, the x2 will, NEVER show an extended battery percentage correctly no matter how many times you "calibrate" that's just how it goes, it doesn't realize there is a higher capacity battery in the device larger than 1500mah, what you wanna do is use a battery voltage widget to monitor battery left, when it starts to get around 3500mV is when you are gonna want to charge I believe, (I think that 3200 is completely dead, and 4200 is topped off)
also,, wiping battery stats is a useless practice, not long ago I believe a Google developer wrote about why it's useless, apparently battery stats only has to do with the battery use settings stats about which apps have used which amount of battery. the battery stats gets reset/wiped EVERY time you get to a near fill-full charge (hence why the battery use graph resets itself when u almost fully charged, if you stop charging around 60-70% it wont reset)
reference:: http://rootzwiki.com/_/articles/wiping-battery-stats-is-pointless-says-google-r316
ashclepdia said:
that will only happen with extended batteries or one of those "Chinese", aftermarket batteries
regardless, battery life of Li-on batteries will decrease from letting it completely discharge, the more times you do it, the less your battery health will be.(BTW when do you "have to" let it discharge completely? , I'm not "calling you out or trying to "make you look stupid" or anything, I'm just curious what you meant by that?)
when I say 15-5% don't look at it as when Android reports that percentage, the x2 will, NEVER show an extended battery percentage correctly no matter how many times you "calibrate" that's just how it goes, it doesn't realize there is a higher capacity battery in the device larger than 1500mah, what you wanna do is use a battery voltage widget to monitor battery left, when it starts to get around 3500mV is when you are gonna want to charge I believe, (I think that 3200 is completely dead, and 4200 is topped off)
also,, wiping battery stats is a useless practice, not long ago I believe a Google developer wrote about why it's useless, apparently battery stats only has to do with the battery use settings stats about which apps have used which amount of battery. the battery stats gets reset/wiped EVERY time you get to a near fill-full charge (hence why the battery use graph resets itself when u almost fully charged, if you stop charging around 60-70% it wont reset)
reference:: http://rootzwiki.com/_/articles/wiping-battery-stats-is-pointless-says-google-r316
Click to expand...
Click to collapse
Thanks for pointing that out. I regularly swap between my standard and extended batteries (both straight from VZW) because I'm always out and about and have used re-cal's to keep the perceived percentages from being skewed since I like to know how much life I have left in my phone so I know if I am gonna be able to find my way home or not, lol. (I ride my bike far and wide.)
I remember reading a while back that every time you un-plug your phone from a full charge that battery bin file gets re-written as 100%. So regardless of what android reports, yes, you will always get to use your battery until it is fully dead, but when swapping between two different capacities of batteries the reported percentages get skewed. And as I mentioned before, more often than not I am far from home on a bicycle in a city I only know a fraction of, and many nights somewhat inebriated, haha. I <3 my android, but it can certainly be a lot of work to keep up with.
Maleko48 said:
Thanks for pointing that out. I regularly swap between my standard and extended batteries (both straight from VZW) because I'm always out and about and have used re-cal's to keep the perceived percentages from being skewed since I like to know how much life I have left in my phone so I know if I am gonna be able to find my way home or not, lol. (I ride my bike far and wide.)
I remember reading a while back that every time you un-plug your phone from a full charge that battery bin file gets re-written as 100%. So regardless of what android reports, yes, you will always get to use your battery until it is fully dead, but when swapping between two different capacities of batteries the reported percentages get skewed. And as I mentioned before, more often than not I am far from home on a bicycle in a city I only know a fraction of, and many nights somewhat inebriated, haha. I <3 my android, but it can certainly be a lot of work to keep up with.
Click to expand...
Click to collapse
trust me, I know exactly what you're talkin bout
except mostly riding buses/trains for mE
I have two standard and one extended, I always use the extend first since it will never report correctly when I'm out, then I switch to the standard ones so when they are running low, I KNOW when they will die lol
same here, wifes x2 battery last 2 days..awesome

Charge phone prior to using?

Are we going to need to charge this phone for 8-10 prior to first use?
Sent from my Epic 4G
They always say to do that, but I have never been able to keep hands off a new phone that long.
pdappcgeek said:
Are we going to need to charge this phone for 8-10 prior to first use?
Sent from my Epic 4G
Click to expand...
Click to collapse
Usually they come about half charged so you'll be good for a few hours. The 8-10 hour rule was for older battery technology (nickel cadmium), the new kind (lithium polymer I think?) is much more flexible as far as charging schedules. I don't think you have to do anything special for the initial charge.
pdappcgeek said:
Are we going to need to charge this phone for 8-10 prior to first use?
Sent from my Epic 4G
Click to expand...
Click to collapse
The better question is can you wait that long?
Sent from my PG86100 using Tapatalk 2
Honestly, when you get your phone (and once a month) you should let your battery drain completely (within 2% is a decent rule) and then charge all the way. Do this for 2-3 cycles and you battery will last a lot longer. This is true for any electronics.
Skullmonkey said:
Honestly, when you get your phone (and once a month) you should let your battery drain completely (within 2% is a decent rule) and then charge all the way. Do this for 2-3 cycles and you battery will last a lot longer. This is true for any electronics.
Click to expand...
Click to collapse
not quite - the below is from Battery University in regards to lithium ion batteries (which is what's in the evo);
If at all possible, avoid frequent full discharges and charge more often between uses. If full discharges cannot be avoided, try utilizing a larger battery. Partial discharge on Li-ion is fine; there is no memory and the battery does not need periodic full discharge cycles other than to calibrate the fuel gauge on a smart battery.
Click to expand...
Click to collapse
And
Lithium-ion is a very clean system and does not need formatting when new, nor does it require the level of maintenance that nickel-based batteries do. The first charge is no different than the fifth or the 50th. Formatting makes little difference because the maximum capacity is available right from the beginning. Nor does a full discharge improve the capacity once faded. In most cases, a low capacity signals the end of life. A discharge/charge may be beneficial for calibrating a “smart” battery, but this service only addresses the digital part of the pack and does nothing to improve the electrochemical battery. Instructions to charge a new battery for eight hours are seen as “old school” from the nickel battery days.
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Click to collapse
alainater said:
The better question is can you wait that long?
Sent from my PG86100 using Tapatalk 2
Click to expand...
Click to collapse
LOL..... I ask because I don't want to have to feel guilty about not waiting!
Sent from my Epic 4G
Ummm.... Yes? Maybe? HELL TO THE NO!
Lithium Polymer batteries are not the same as Lithium Ion batteries.
Avoid draining them to the point the phone shuts off. If they get too low they die.
Never run them down on purpose.
I run RC trucks, I have been using LiPo batteries for several years.
Skullmonkey said:
Honestly, when you get your phone (and once a month) you should let your battery drain completely (within 2% is a decent rule) and then charge all the way. Do this for 2-3 cycles and you battery will last a lot longer. This is true for any electronics.
Click to expand...
Click to collapse
fachadick said:
not quite - the below is from Battery University in regards to lithium ion batteries (which is what's in the evo);
And
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Click to collapse
If the phone's charge time is roughly 2-4 hours, what will charging it 8-10 accomplish?
The Sprint store opens and activates phones on the spot regardless of charge, which leads me to believe that--while some/most Sprint store Employees aren't very knowledgeable in electronics, I'm sure they would have been told in one of the many meetings they have that you need to not do this and inform the customer of needing to charge their phone for __ amount of time before using it.
At any rate I'm just playing along with the possibility. Of course you don't need to charge your phone any amount of time before using it the first time. Our battery technology has evolved to the point where trying to keep track of charge schedules is irrelevant and not needed. Seriously, if it were, they would have provided a small paper calendar with your phone so that you can mark when the last time you fully discharged it as well as instructions on how to care for your battery.
fachadick said:
not quite - the below is from Battery University in regards to lithium ion batteries (which is what's in the evo);
And
Click to expand...
Click to collapse
While this is accurate, I still always try to full discharge as often as possible. I do this because the phone reads battery information and calibrates the battery percentage based on that.
In my own unscientific research, it seems that frequent charging messes up the battery readings. I know that there was once an article about wiping battery stats being a placebo effect, but it really does seem to help when you wipe, full charge, full discharge. The phone always seems to last longer, but its likely because the phone is properly calibrating the max/min capacity of the battery accurately.
Sent from my PG86100 using Tapatalk 2
The batteries in phones anymore do not use memory in the actual cell. The phone itself does keep record of the battery to help protect it, and clearing that out and re-calibrating the battery by draining it can help, but doing full drains to the battery will just reduce the overall life span of the battery.
Unreasnbl said:
Lithium Polymer batteries are not the same as Lithium Ion batteries.
Avoid draining them to the point the phone shuts off. If they get too low they die.
Never run them down on purpose.
I run RC trucks, I have been using LiPo batteries for several years.
Click to expand...
Click to collapse
The batteries in phones are not lipos.. they are lithium ion... Putting a lipo in a phone is just asking for death or injury lol..
When the first EVO came out this method was dine to train the phone more then the battery and I still use it.. drain till it turns off.. turn back on..keep doing this till it will not turn on..full charge it.. take off charger and put back on till led is green again. I've never burnt out a battery but I can't professional it helped battery life but as I said when EVO first came out battery life was horrid
Sent from my PC36100 using XDA
grrmisfit said:
The batteries in phones are not lipos.. they are lithium ion... Putting a lipo in a phone is just asking for death or injury lol..
When the first EVO came out this method was dine to train the phone more then the battery and I still use it.. drain till it turns off.. turn back on..keep doing this till it will not turn on..full charge it.. take off charger and put back on till led is green again. I've never burnt out a battery but I can't professional it helped battery life but as I said when EVO first came out battery life was horrid
Sent from my PC36100 using XDA
Click to expand...
Click to collapse
The LG Fusic had a LiPo battery.
Yeah i bet some phones will have no charge after customs played with them for a while and did not turn them off and put them back in for us to get screwed. But you may have a update already apply as well to the phone.
fsuwade said:
Yeah i bet some phones will have no charge after customs played with them for a while and did not turn them off and put them back in for us to get screwed. But you may have a update already apply as well to the phone.
Click to expand...
Click to collapse
If I recall correctly, only a sample from each batch was tested and that tested sample was not shipped out to customers.
Yup thats what I heard as well
What I read says this phone has a LiPo battery. They are being used more often in portable electronics than you think.
http://en.wikipedia.org/wiki/Lithium-ion_polymer_battery
grrmisfit said:
The batteries in phones are not lipos.. they are lithium ion... Putting a lipo in a phone is just asking for death or injury lol..
When the first EVO came out this method was dine to train the phone more then the battery and I still use it.. drain till it turns off.. turn back on..keep doing this till it will not turn on..full charge it.. take off charger and put back on till led is green again. I've never burnt out a battery but I can't professional it helped battery life but as I said when EVO first came out battery life was horrid
Sent from my PC36100 using XDA
Click to expand...
Click to collapse
I heard LiPo as well.
Sent from my PC36100 using XDA
simple solution.
keep the phone plugged in while you use it. duh.
charge at the wall and your office computer

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