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Man, I hate starting new threads! I did a simple search and couldn't find this problem anywhere else, so here goes:
Earlier in 2009 I bought an extended 2400mAh battery for my Kaiser (8925). Everything is working just fine, except that I noticed that the phone doesn't seem to notice that the battery life is much better for this new battery.
What I mean is: after a few hours of usage, the battery level drops at a normal rate.
Once the phone tells me the battery is almost dead (and sometimes the phone will shut off if I ignore this), I can shut down the phone, remove the battery, wait a few seconds and then replace it and boot back up the phone.
At this point, the phone will usually tell me that the battery is at 33% to 36% charged. Notice that I did not charge the battery, I just removed it and put it back in.
When I first got the battery, I cycled it completely three times in the phone, removing it twice and replacing it to ensure that the battery was completely drained before charging it to 100%. (Yes, I know that is only recommended for metal-hydrates, but I feel better doing that anyway).
On the top-end, it usually takes about two hours to charge the phone from 30% to 99% via a standard USB2.0 connector.
However, the phone will report that the battery is not fully charged for nearly an hour after reaching 99%.
I know what you are probably thinking; Why is this guy complaining about his battery performing better than his phone reports?
Well, it IS kind of annoying. I would like the phone to properly report the remaining percentage for my own benefit. I really hate having to guess at how much time I have left before I need to drop it off at a computer or wall outlet while I find something else to play with for three or four hours.
So... Does anyone know how I can convince my phone that the battery is pretty awesome and to start reporting the actual battery life?
So.... following Mikey1022's thread crusade, I'm almost hesitant to post this here, but I feel like I'm going to get the most accurate answer from the people in this forum vs general...
On Cyanogens site, I found this for Battery Recalibration:
Battery recalibration
If you're experiencing higher than normal battery drain, try the following:
1. Charge the phone to full battery; let it keep charging until the battery says it is fully charged. Do not wait until the light is green, it isn't always fully charged, causing a lot of inaccuracies. (You can check by going to: Settings -> About Phone -> Status -> Battery Level = Full.)
2. Boot to recovery mode and go to console (or adb shell) and type:
mount -a
rm /data/system/batterystats.bin
NOTE: Newer Amon_Ra recoveries have an option to delete the battery stats, do this in place of the console commands above.
NOTE: To have the most accurate of battery stats, reboot the phone immediately after wiping the battery stats and wait for CM to boot completely to the desktop. Once your entire boot is done and you have full access to the phone, go ahead and pull the charger and continue with this troubleshooter.
1. Do not charge the phone until after draining the battery completely, resulting in it automatically shutting off.
2. Recharge the phone completely and then use as you normally would.
SO I'm at work, and don't have the option to check this, but unlike "hardware" battery calibration I'm mostly curious about removing the batterystats.bin
Would it help us with our battery woes, or do ours go deeper? For some reason, I noticed that mine's been draining a LOT faster in the past month or so then before...
Any thought?
This belongs in the general area?
I really don't think there's a magic forumula for these LIPO batteries. Unless you have a bad battery, you like numerous others need to join the battery 12 step program. I've already been through it. "Hello, my name is Sean and I'm obsessed with my battery life."
Long story short, just keep charge the battery when it gets low. If you work near an outlet or computer, and sleep near one - it's quite easy to keep the battery up throughout the day.
FYI, I've read up on this a bit regarding laptop batteries. It has nothing to do with the actual battery life or the "memory effect" (these batteries don't have a memory effect). It has to do with the OS's interpretation of the battery's performance and how it is reported to the user. So you're really recalibrating Android, not the physical battery. As far as I've read, this only "needs" to be done once in a great while, once a year maybe. Or if you notice something really odd with the battery level reporting.
I did this this morning as well since my phone was fully charged and ready to try it. Not had any hugely bad side effects from the phone and new battery (1750), but we will see if this changes anything.
wraithdu said:
FYI, I've read up on this a bit regarding laptop batteries. It has nothing to do with the actual battery life or the "memory effect" (these batteries don't have a memory effect). It has to do with the OS's interpretation of the battery's performance and how it is reported to the user. So you're really recalibrating Android, not the physical battery. As far as I've read, this only "needs" to be done once in a great while, once a year maybe. Or if you notice something really odd with the battery level reporting.
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Well, actually, that's why I put it in the development forum. These instructions are telling us to remove things from the system. Also on that note, my battery went from being at 30% full by 10pm (fully charged in the morning) to 30% full by 3pm (YES, 3) so something is definitely wrong, not just "I am obsessed with my battery life". Mind you, I'm at work until 2, so my phone drains to 30% on IDLE, with screen off. I was thinking maybe Android is misinterpreting something? I removed all programs that I thought might be causing this, turned off wifi, bt, gps, still no go. Maybe bad battery?
What I'm thinking this may help with is the fully charged issue the incredible has. I wouldn't follow the above instructions exactly however. Let me explain.
If you've ever noticed, the OS doesn't report "fully charged" correctly. Charge your battery to full (where both the green light comes on AND the "about phone" battery status says "Full". Now shut your phone off, you'll notice your light turns orange again, and will charge for about 30 minutes, sometimes more depending on how far off the battery is. If you turn on your phone after this, you'll notice you stay at 100% for quite some time. This is the case with a lot of incredibles from what I've seen... It probably has to do with the calibration notated above.
I would say do the calibration noted above, however, charge it the way I just noted (charge to full, shut the phone off, let it finish charging to full...). Then follow the rest of the steps immediately following. Might make a difference.
EDIT: this is probably even more true for the 1750mAh battery.
calibration and such has been discussed but not under its own name on page 3 i explain abit about the lithim ion battery vs nickel cadium.
http://forum.xda-developers.com/showthread.php?t=695472
junjlo said:
calibration and such has been discussed but not under its own name on page 3 i explain abit about the lithim ion battery vs nickel cadium.
http://forum.xda-developers.com/showthread.php?t=695472
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I was witness to that thread, and yes, you are correct, Lithium Ion batteries do not need to be conditioned, it is useless... However, we are not talking of conditioning, we are talking of proper reporting of battery life through the OS, which IS how Lithium Ion memory works. This is not saying to Cycle your battery 3 times to "condition" it to full potential. It is stating that the OS is not properly calibrated to report the proper life of the battery. If the OS cuts the charging of a Lithium Ion battery because it "thinks" it is at 100% charge, while the battery itself is at 80% (just a random example), then your battery life is going to appear to be shorter than it should. The example posted above would theoretically reset the OS so that when it says the battery is at 100%, it indeed is at 100%, preventing it from cutting a charge before it should. See my post previous post if you are confused. "Conditioning" is an entirely different animal, in which you "train" the batteries memory (in Nickel cad batteries) before utilizing your battery in normal charging operations. Lithium Ion does not have this memory, making "Conditioning" useless.
Moral to the Story here is to fully charge your phone when its off and you don't have to deal with any of these work arounds. Am I right?
buy a second battery and an external charger. I do this with every phone and I always seam to get battery life that is on the high side of what people report
Thank you for correcting that was bit early in the morning thought it was same question.
Sent from my ADR6300 using Tapatalk
I'm trying this and I've seen an improvement already on the stock battery. Been off charge for 8hrs and 13 mins and is still at 70% charge. Figures it holds a charge when you want to run it down!
jermaine151 said:
I'm trying this and I've seen an improvement already on the stock battery. Been off charge for 8hrs and 13 mins and is still at 70% charge. Figures it holds a charge when you want to run it down!
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What, exactly, are you trying that's giving the improvement? The OP's suggestion of booting into recovery and deleting battery stats, or the other common suggestion of turning phone off for the remainder of the charge? 70% after over 8 hours is FAR better than I'm seeing, and I'd like to see the same results.
alexdw369 said:
What, exactly, are you trying that's giving the improvement? The OP's suggestion of booting into recovery and deleting battery stats, or the other common suggestion of turning phone off for the remainder of the charge? 70% after over 8 hours is FAR better than I'm seeing, and I'd like to see the same results.
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I charged with the phone off, then went into recovery and deleted the battery stats file. Now I'm trying to discharge it completely.
jermaine151 said:
I charged with the phone off, then went into recovery and deleted the battery stats file. Now I'm trying to discharge it completely.
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I am doing the same. Will follow up with results in a few days.
alexdw369 said:
What, exactly, are you trying that's giving the improvement? The OP's suggestion of booting into recovery and deleting battery stats, or the other common suggestion of turning phone off for the remainder of the charge? 70% after over 8 hours is FAR better than I'm seeing, and I'd like to see the same results.
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That's awesome! That's great battery life. I might have to try this.
~ IRC: nostradamus ~
EM30996 said:
That's awesome! That's great battery life. I might have to try this.
~ IRC: nostradamus ~
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Trying it myself tonight. Will post results tomorrow.
I'm trying it to. I will post results.
Sent from my HTC Incredible using Tapatalk
Just tried this method, fully charging the phone when it's off then wiping the battery stats. Hoping it'll fix the annoying problem that the battery doesn't fully charge when the phone is on, although I'm not sure if it even can be fixed -- does anyone know?
I'll update if I remember next time I charge it.
Giving a try
Hey guys. I am also giving this a try today.
I just completely charged my battery last night with it off. This morning I unplugged the charger (while the phone was still off) and plugged back in to make sure that the battery was fully charged. The green light turned orange for a couple of minutes and back to green so I proceeded to boot to recovery and removed the battery file. I am also running a Seidio 1750mah.
I am now up and running. I will post later this afternoon to let you know how it's going.
If this fixes the weird battery bug where the Incredible doesn't charge fully, I will kiss the OP. Seriously.
I have noticed that every time I load a new Rom on my phone (including a wipe) my battery life is awesome as long as I let the phone get down to about 2 percent before recharging. As soon as I charge the phone without the battery almost dead the battery life on the phone starts to suck. This leads me to believe that there is something written to flash memory when you plug the charger in. For a while I had noticed that if I plug the charger in in the middle of the day due to heavy usage that my battery life sucks for a week or so afterwards then slowly goes back to normal after regular charging before I go to bed. Under normal charging conditions (plug it in when I go to bed) I can get about a days worth of charge. This is a stark contrast to the 2 plus days I get out of the phone after a fresh ROM load is loaded and I let the battery almost die before charging it in.
Anyone else observe this or have any idea whats going on that can be causing this. Maybe its just a simple matter of finding the file and deleting it. And yes I have tried doing a jump charge and wiping the battery stats. It doesn't give the same results as a wipe of the phone with a new ROM.
My battery seems good if i do this...
Install new ROM or not, just charge phone while i sleep (usually from 12am-530am) up and at work, coverage sucks in the building so i constantly switch from 1x to 3g ... battery life drains and i will be dead by 12 - 1230pm If i leave it on charge from then until i hit 100% (usually 30 minutes after) i take it off and head out of work, ill last all day and end up at 12am again with at least 60%
This is all heavy usage. Pandora stays running, facebook and plenty of texts/emails. My phone will never sit still without any activity for 2 minutes.
Switching kernels is the thing that saved my battery with now my kernel is 2.6.32.32-ck2-BFS by ziggy
awesome battery life out of the stock HTC battery
It could be different phones handle the same rom/kernel differently too. I noticed this when i was running a blackberry storm 2. Both mine and my brothers, we would have the exact hybrid OS installed. let em sit idle after having done the exact thing....mine would drain a lot faster than his. could be phone vs phone in the same case as i mentioned, who knows? what rom / kernel you running?
Sorry man but I don't understand your post. The sentence where you explain what you do doesn't make any sense. Can you explain again.
I'm running Cyanogen 7 rc2 with the stock kernel that comes with it. I don't believe its possible to change the kernel on Cyanogen.
trevoryour said:
Sorry man but I don't understand your post. The sentence where you explain what you do doesn't make any sense. Can you explain again.
I'm running Cyanogen 7 rc2 with the stock kernel that comes with it. I don't believe its possible to change the kernel on Cyanogen.
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You can use whatever AOSP/GB kernel you want.
So its been a while since my last update but I wanted to pass along some more observations in hopes that someone can tell me how the power system works on Android phone.
For quite some time I have been able to use my phone for 2 full days before it required a recharge. This came about when I loaded Cyanogen 7 on my phone from scratch. As long as I charged it every 2 days the phone would have no problems lasting for two full days.
Two weeks ago I got stuck at a car dealership for about 8 hours. I passed the time by reading books, playing angry birds and surfing the net on my phone. About 7 hours in my phone was at 2 percent. I plugged the phone into someones charger and charged it for an hour or so so I would have a phone for the drive home. Ever since then my battery life has sucked. For a while I could barely get a full day out of my phone before it would die. I'm getting about a day out of it now which is acceptable I suppose but Its disappointing since I know the phone is capable of so much more.
So seriously what is the deal with the charging system on this phone? Why is it the phone has excellent battery life only after the phone is wiped and fully discharged before it is plugged in again? If a wipe of the phone fixes the battery what is it about the whip that does the fixing? Can it be reproduced without wiping the phone?
Come on guys. Someone out there is smart enough to figure this out. Hook us up.
It'll constantly recalibrate after you flash, so no real need to do the full discharge unless you really want to. If you don't do it then it'll get stable and better accuracy after a couple of weeks, but yes when you first flash a ROM it'll have sketchy battery life.
The battery is charging fine but your phone is still trying to determine how big your battery is, so it may not fully charge all the way. The quickest way for your phone to determine how big your battery is, is to drain it all the way down then charge it all the way back up. Some say this is potentially damaging to Li-Ion batteries. Personally I don't do it because of that, but if you chose to not do a full drain, your phone will figure out your battery size it'll just take a longer time for your phone to do it.
The actual battery life you get on your phone varies hugely on (in order):
1) amount of CPU you're using
2) data usage
3) reception strength
4) Screen brightness
So that in itself will cause some drastic day to day difference in battery life.
With all that being said, the battery life you're not getting during the inaccurate gauge period isn't that much. If you're someone who needs every last minute of battery that you need to have them right away, then personally I would suggest doing some other things such as under-volting your kernel and lowering your clock speeds.
I just got some new batteries for my i-9000. I am wondering, I have always heard LIthium batteries do not like to be fully discharged. I want to perform a calibration on the new battery, but all the battery calibration apps say
1.Fully charge the battery
2.Press calibrate battery button.
3.Run the phone fully flat until the battery dies.
4.Fully charge the battery to 100% uninterrupted.
Now, step 3, going all the way until the phone dies, is that a good thing to do or a bad thing to a new battery?
Letting your cellphone's battery drain until the phone dies is a normal thing that won't damage your battery, because the battery won't really go to 0% charge.
Cellphones always shutdown it-self when the battery levels get too low (like 3%), to avoid the damage it would do in the Li-ion battery if it would go to 0%. So you have nothing to worry about.
yeah mine shuts down around 2-3% percent for that reason. You'll be fine.
thanks.
.
just doing it once when you get a new phone or after noticing horrible battery life on a newly flashed ROM can work wonders
other than those times, I only let my phone get to 20-40% before I plug it back in
I Use BOS Gingersense Port From Kingdom, My battery is good and i didnt do that whole discharging,recharging crap.
calibration works for me...
Calibration even worked for me too, on my Galaxy 3. Previously i was getting backup of only 1 day, but after calibration i get around 1.5 days. I know its not much improvement, but still its worth.
And you don't need calibrate frequently. Just once in two weeks is fine. And I've heard that deep discharge once a while is infact good for the battery. Correct me if I'm wrong.
waiting for phone to completely die right now. One question though can I turn on phone while charging or should I just leave it off after dieing?
I called Sammy, they told me letting the phone turn off by itself because the battery can't power it is bad for the battery in the long run, they said you can't really see the bad effect that time, they told me, we have learned on are testing that when you see the low battery message pop up that is where you need to charge the phone, that warning is where the calibration starts, now draining it to the point that the phone turn itself off is bad for the battery. Do you believe that?
Sent from my SAMSUNG-SGH-I997 using XDA Premium App
Only if you leave the cell empty.
It's best to recharge a cell as soon as possible if you have discharged it.
Discharge/charge cycles should be kept to a minimum, ie when you first get the battery, when you are sure you need to recalibrate, and when you've got no choice.
Top up charges are best for lithium batteries.
The charging circuitry in the phone should protect the battery from over discharge. It also protects the phone from overcharging. However, just like a spring, it's the constant charge/discharge that damages a battery. I would not run it down every day but it should not damage the battery, only cause it to wear out faster.
Source: I'm an electrical engineer.
Try to avoid frequent full discharges. Occasional full discharges are okay.
Lots of uncertainty here, lol.
A new Li-Ion cell will output ~4.2V when fully charged and ~3V when it is totally discharged. Every single smartphone I've owned would shut down before the cell dropped below 3.5V. Draining your phone's battery until it dies will not hurt the battery or your phone. No worries about batteries catching fire.
Repeated or frequent full discharges will wear your battery out much faster, though.
When I get my new toy tomorrow, I plan on using it! As per what I've read, gonna use it down to 10% or so...then give 'er a full-up charge. Kind of curious what everyone elses' plans are for their first time 'round?
k.babymamma said:
When I get my new toy tomorrow, I plan on using it! As per what I've read, gonna use it down to 10% or so...then give 'er a full-up charge. Kind of curious what everyone elses' plans are for their first time 'round?
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Most likely this, but I may play around with the spare battery and throw the battery in the charger for 8hrs
Sent from my SAMSUNG-SGH-I717 using xda app-developers app
k.babymamma said:
When I get my new toy tomorrow, I plan on using it! As per what I've read, gonna use it down to 10% or so...then give 'er a full-up charge. Kind of curious what everyone elses' plans are for their first time 'round?
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Is that the general consensus on how to break in the battery? First move to an android phone and learning all I can.
I have always charged it up when i get it first then all the way down...but we all know how it is when we get a new phone....can't put it down! So...i play a bit first..
Confirmed tomorrow delivery!
Sent from my SAMSUNG-SGH-I717 using Xparent SkyBlue Tapatalk 2
I usually run it dead first then charge it to full. I don't think there is a wrong way to do it anymore. someone correct me if I am wrong and why.
rans0m00 said:
I usually run it dead first then charge it to full. I don't think there is a wrong way to do it anymore. someone correct me if I am wrong and why.
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Click to collapse
I do the exact same thing as you.
Rocket42 said:
I have always charged it up when i get it first then all the way down...but we all know how it is when we get a new phone....can't put it down! So...i play a bit first..
Confirmed tomorrow delivery!
Sent from my SAMSUNG-SGH-I717 using Xparent SkyBlue Tapatalk 2
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Congrats to everyone *finally* getting their beastie! I can't wait for mine...nor can I wait to PLAY with it! I did some researching on ye ole battery issue...there are a lot of different theories...so I decided to go with the "drain it out of the box, then charge" because this fits in with my extreme need to PLAY! I read it may be a good way to go to "break in" the battery, if you're of that school of thought. Some people say they do not need "broken in". Some say they need fully charged first...yada yada yada and so on & so forth. I do think the newer batteries are different than those of yesteryear in that they don't have a memory, etc, and some of the old schoolers are still stuck with that thinking. Maybe. I dunno. I'm far from any expert. (I just wanna PLAY!!! lol)
Anyone try out that Ready2Go thing thru AT&T? Kinda neat. I did it. We'll see. I just did my contacts though. The rest is taking the fun away of customizing a new toy!
rans0m00 said:
I usually run it dead first then charge it to full. I don't think there is a wrong way to do it anymore. someone correct me if I am wrong and why.
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A Google dev came out and said on XDA a while back (the heck if I'm going to try to find the post) that battery stats have basically no effect on anything anymore. All the same, I "grew up" on cell phones by draining them to 0, then plugging them in until 30 minutes after they show a full charge, so I've just kept doing it that way.
It seems to me that companies wouldn't send out a battery without testing it... Which would involve charging/discharging it. So I don't think there's any need to treat a battery any differently when it's fresh out of the box than you would after the "break-in" methods people have posted in here.
T.J. Bender said:
...All the same, I "grew up" on cell phones by draining them to 0, then plugging them in until 30 minutes after they show a full charge, so I've just kept doing it that way.
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this is probably why I do it too.
You should not be using the same method on Lithium-Ion batteries that you do on Ni-cad... cause they ain't nicad
Just do a little research. They don't require any break-in. Not only that but it's suggested you charge often and not fully discharge if you can avoid it.
Just plug the phone in when you get it and charge it up. If you want to use it feel free, plugged in or not.
Some common tips taken from Gizmodo and Blackberry's sites:
• Do not let it run out completely all the time. Full discharge puts a lot of strain on the battery
• Do not keep a Li-ion battery fully charged all the time, either. If you don't use your battery it might suffer from capacity loss
• Keep your battery in cooler temperatures. Hot hot heat is not good for it
• If you're gonna store your battery, leave 40%-50% charge in and store it in a cool place (i.e. fridge).
1. When you get a new Blackberry, charge it fully to 100%. There is no 120% or 130%, so once it hits 100%, it is fully charged. This normally takes about 2-4 hours for a new device. There is nothing wrong with “over-charging” the battery, however there is no real need to do so. Sometimes, new Li-ion batteries will come fully charged out of the box.
2. There is no “break-in” or “conditioning” required for the Li-ion batteries. They do not need the old “fully discharge – fully charge” routine for the initial three charges as was recommended on older battery technologies.
3. If you are a brand new BlackBerry user, keep in mind that you are likely using (or playing with) your BlackBerry much more the first few days than in normal routine use. If you think you are having quick battery discharge issues, give yourself a week or so until your daily BlackBerry usage levels off to a perceived normal amount. Don't freak out after the first one or two days if your battery depletes itself halfway through the day--You're probably using the device at a higher than normal use.
Lectures tterngs
santiagodraco said:
You should not be using the same method on Lithium-Ion batteries that you do on Ni-cad... cause they ain't nicad
Just do a little research. They don't require any break-in. Not only that but it's suggested you charge often and not fully discharge if you can avoid it.
Just plug the phone in when you get it and charge it up. If you want to use it feel free, plugged in or not.
Some common tips taken from Gizmodo and Blackberry's sites:
• Do not let it run out completely all the time. Full discharge puts a lot of strain on the battery
• Do not keep a Li-ion battery fully charged all the time, either. If you don't use your battery it might suffer from capacity loss
• Keep your battery in cooler temperatures. Hot hot heat is not good for it
• If you're gonna store your battery, leave 40%-50% charge in and store it in a cool place (i.e. fridge).
1. When you get a new Blackberry, charge it fully to 100%. There is no 120% or 130%, so once it hits 100%, it is fully charged. This normally takes about 2-4 hours for a new device. There is nothing wrong with “over-charging” the battery, however there is no real need to do so. Sometimes, new Li-ion batteries will come fully charged out of the box.
2. There is no “break-in” or “conditioning” required for the Li-ion batteries. They do not need the old “fully discharge – fully charge” routine for the initial three charges as was recommended on older battery technologies.
3. If you are a brand new BlackBerry user, keep in mind that you are likely using (or playing with) your BlackBerry much more the first few days than in normal routine use. If you think you are having quick battery discharge issues, give yourself a week or so until your daily BlackBerry usage levels off to a perceived normal amount. Don't freak out after the first one or two days if your battery depletes itself halfway through the day--You're probably using the device at a higher than normal use.
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AWESOME post, thanks!
santiagodraco said:
You should not be using the same method on Lithium-Ion batteries that you do on Ni-cad... cause they ain't nicad
Just do a little research. They don't require any break-in. Not only that but it's suggested you charge often and not fully discharge if you can avoid it.
Just plug the phone in when you get it and charge it up. If you want to use it feel free, plugged in or not.
Some common tips taken from Gizmodo and Blackberry's sites:
• Do not let it run out completely all the time. Full discharge puts a lot of strain on the battery
• Do not keep a Li-ion battery fully charged all the time, either. If you don't use your battery it might suffer from capacity loss
• Keep your battery in cooler temperatures. Hot hot heat is not good for it
• If you're gonna store your battery, leave 40%-50% charge in and store it in a cool place (i.e. fridge).
1. When you get a new Blackberry, charge it fully to 100%. There is no 120% or 130%, so once it hits 100%, it is fully charged. This normally takes about 2-4 hours for a new device. There is nothing wrong with “over-charging” the battery, however there is no real need to do so. Sometimes, new Li-ion batteries will come fully charged out of the box.
2. There is no “break-in” or “conditioning” required for the Li-ion batteries. They do not need the old “fully discharge – fully charge” routine for the initial three charges as was recommended on older battery technologies.
3. If you are a brand new BlackBerry user, keep in mind that you are likely using (or playing with) your BlackBerry much more the first few days than in normal routine use. If you think you are having quick battery discharge issues, give yourself a week or so until your daily BlackBerry usage levels off to a perceived normal amount. Don't freak out after the first one or two days if your battery depletes itself halfway through the day--You're probably using the device at a higher than normal use.
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Click to collapse
This is exactly right. Lithium Ion batteries benefit from smaller and quicker charge/discharge cycles. Actually draining a Li-ion battery to 0% and letting the phone die can decrease the total battery capacity and causes unnecessary damage to the battery. You should never do a "deep-discharge" and full recharge on a Li-ion battery.
Just pull it out of the box and use it, charge it before it hits 0%, and you'll be alright.
Heres another trick
I have done this more than a few times. Does it make a difference? I cannot say with anything more than anecdotal evidence, but I have had noticeable success and the logic makes a certain degree of sense.
Running the battery fully down often is claimed to be detrimental, and I have no reason to doubt that. Doing so once in say, 25 cycles is probably not a bad idea, although it does not do much of anything to capacity. What it does is help calibrate the battery meter. Than I add the following technique to increase the discharge time (run time) of the device:
At whatever point you finally let the battery fully discharge, do this as well:
If you have power saving feature, turn it off to get the job done. When it actually shuts down from being fully discharged, plug in and charge fully with the phone OFF. When the battery reached 100% fully charged take out the plug, wait a minute, and put it back on the charger. It will charge for 5-10 minutes more. NOW remove the plug, boot the phone, and put the plug bag in again (more charging ensues) and repeat one additional time. THIS technique seems to "Stuff" more electrons into the phone (see how scientific my explanation is? Whether I am helping, hurting or having no effect on the batteries longevity i can't say, but I CAN say is that I absolutely see longer cycles for quite some time after doing this.YMMV of course.
Whatever you consider "training" the battery, make 100% sure that the first full charge is indeed that: a FULL charge. This is one point that most documentation agrees upon. Getting the full use of the battery requires a FULL and complete first charge. Since I have no method to trickle charge, I tend to use the device while initial charging completes - I feel like that draws out the process, though why this is better. I can't say.
If only there was a definitive guide. Yes there are points in common among experts (such as running lithium ion fully charged all the time, especially warm, is terrible for them, yet almost all laptop makers let this happen by default when you run it on the charger (there is software to cycle the batteries), and some companies are including versions of this type of utility. Bottom line? batteries are cheap enough, but it's not ABOUT the money - It's about the run time. Heck - if I can't get good run time for a 3100 mA Battery, with a 2 amp charger, I better hang it up!
put the battery in, don't turn on the phone, and charge overnight. I know I know, this is the most difficult part. after that do whatever you like.
You are supposed to run the battery down every now and then(like every few months) What this does is it re calibrates the battery, separate from the android battery stat.
The batteries are tested and filled and drained then charged half way before packaged. A half of a charge is best for storage.
If your batter is dead when you open the box, exchange it. A battery sitting dead is really really bad. I have purchased a psp and some other devices that had DOA batteries and they never hold a charge for very long.
Android is the best I've seen with overcharging. Meaning there is none. The Android OS controls charging and doesn't allow the battery to fry like laptops do when plugged in all the time. I wouldn't worry about it with any Android device. Laptops should not stay plugged in for more than a few hours after full.
Running the battery down to zero (which is really 1-3%) is not "bad" what it really does is use up your charge/discharge cycle. Batteries have a certain number of charge/discharge cycles (like 300 or so) and running from full to dead to full every day will run the battery out faster; rather than charging it at half way or topping it off often.
please read post 11 and ignore anyone else who says anything to the contrary. i race radio control cars, we use lipo batteries, the system has a voltage cut off in the car for a reason. if you run them down too low, the cell will die, and will not take a charge. if you let them sit too long with a low charge, they will die. end of story. they do not need to be fully cycled like the old nicad batteries.
Dave
I say don't worry about it. The battery is replaceable and doesn't cost much. Enjoy your new toy any way you like and put battery worries out of your head.