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I was pondering possible reasons for the battery life problem that many of us are well aware of. Some peoples batterys will last a good day or two and then theres people like me who charge my phone in the morning and when i get home in the afternoon just to keep it alive and this is compared with people using the same rom. So i thought maybe there could be something to do with what the battery level is when the phone is rooted or a new rom flashed, and this process may reduce the battery cycle to a specific point. E.g. if i 1st root and load my new rom on my phone at 50%, when booted it could show 100% but its actually 50% than it should be. i have not tested this but im just putting it forward as an idea. if anyone does have the time to unroot, charge to 100% and then reroot their phone + custom rom and test the battery life could they please post their results here. No harm in trying ...
EDIT:It seems we have found a solution or alteast a way to greatly improve battery life by putting my random idea and the information from maxisma togethere.. here are the following steps:
1. When the battery is low e.g. 10% boot into recovery mode and wipe->battery data
2. Reboot and then drain the battery or let it die (turn on mobile network add the 'sync now' widget and keep syncing with the music on loud - works pretty fast)
3. Leaving the phone dead put it on charge and let it charge fully till the led indicates green (may take longer than normal)
4. UNPLUG!! the charger then boot the phone up and your battery life should be much better
TIP!! Remeber when changing and flashing new roms to unplug the phone from charge after you boot!
Hope this works for you all PM me for results (i went from 5-10% loss an hour to what is now about 1-2% max )
Nice idea but almost certain your wrong
Edit: turns out that you shouldn't boot your phone while charging after all
I've think it's more likely to do with how I charge my phone. If I charge the phone on my PC then the battery lasts me a day. On Sunday night I charged it with a mains charger, and a day and a half later I still have 40% left. That's with constant WiFi, Talk, calls and text messages.
Sometimes I'll do the same things mentioned above and the battery will be about 20% by the time I'm going to bed.
I could be very wrong, I'm no battery expert!
There shouldn't be any difference between PC charging and mains charging. The mains charger would utilise a transformer to give the same oomph as a PC gives...if not it'd fry the battery whilst charging.
Funnily enough, mains AC - DC transforms are a little choppy, although at such a low current it should be entirely negligible, but your PC's power supply should give a cleaner power output than the mains. Are you sure it isn't just a placebo, I still like to think charging my PSP via the mains rather than USB will do it quicker and last longer, since its dedicated
TheAshMan said:
I've think it's more likely to do with how I charge my phone. If I charge the phone on my PC then the battery lasts me a day. On Sunday night I charged it with a mains charger, and a day and a half later I still have 40% left. That's with constant WiFi, Talk, calls and text messages.
Sometimes I'll do the same things mentioned above and the battery will be about 20% by the time I'm going to bed.
I could be very wrong, I'm no battery expert!
Click to expand...
Click to collapse
I've heard this theory before. I can't even begin to fathom how this could be possible. I hereby dismiss it as 'rubbish'.
Seriously though, I think it's far more likely to be related to the apps/widgets people are using after flashing the rom. The only thing that differs drastically from build to build is the different apps that people install.
Might be worth those with very crap battery lives sending me an hours worth of logcat. I can do an hours worth of logcat for myself (I never have battery issues), and compare the results.
He's partly right.
Android has a bug that when it's plugged into a charger while booting up, it'll report a higher battery status than it actually is.
This is preventing the phone from charging the battery completely.
So, a recommendation for you: Always unplug your phone from the charger before powering it up.
Attempt
Since my last post ive drained my battery out. Kept the phone off and charged it fully. It did take longer than normal which could be a good thing. Ive booted it up about 15 mins ago and il post later/tomorrow about how the battery performs now.
WOOO
I maybe jumping the gun a bit here but my phone says an up time of 1hour 27 mins. and normally its about an hour to about 5-10% of battery life and im sorry to say... im still on 100% WOO . I will still report how this lasts through to tomorrow, however i think theres enough evidence to suggest that the method stated earlier seems to fix what seemed to be a 'shortend battery cycle'. Anyone else with a short battery life i advise you to do the same asi have and please feedback to me with any results.. hope this has been helpful
EDIT: Its been two hours now and still 100% woooo
I got escited too bratfink when I had 100% battery for ages while it was in sleep, then I dl'd a few progs from market and whoosh my battery started disappearing faster than expected. Try downloading a few things and you'll see your battry disappearing quicktime.
minfree or ramzswap off could be causing the issue.
I remember before I put that tweak on my phone (when it first came out), my battery life was amazing.
After I put the values in for init.d as from the forum page below:
http://forum.xda-developers.com/showthread.php?t=622666&page=6
the battery life started disappearing like mad! and this was on a modaco rom!
I think now that all the new 2.1 roms are including this minfree tweak it is causing this battery issue to be carried over. All attempts to reduce battery drain are not having as much effect as they could because of this.
I would like to try one of these new roms without the tweak but I do not have the knowhow to stop it. i.e. put the original init.d (or equivalent) for the the roms in place.
You might argue that the memory clearing has nothing to do with the battey drain, but what i saw was that it did on a modaco rom. I don't know whether it is the switching of ramzswap or the minfree settings ( i have a feeling it is both.
Can a chef cook one of their roms without the tweak and keep the original settings?
adb remount
adb shell rm /system/etc/init.d/02memkill
then reboot.
kendong2 said:
adb remount
adb shell rm /system/etc/init.d/02memkill
then reboot.
Click to expand...
Click to collapse
I'm on the BeHero v1.3.2,m will that command put my phone memory settings back to what they would normally be without the taskkiller?
If so can I just remove that file with OI file explorer as atm my laptop usb aint working (can't connect to phone properly, can only charge)
If you use Bluetooth, GPS*, or plug/unplug usb, CPU lock at 528Mhz and battery drain. This happend in all eris/roms.
I can see with Battery Graph while I sleep the battery is full, but no reason (only unlock to check time, kill alarms, read mail,...) the battery drains constantly. (no tweeter, no facebook, no GPS, no BT,..),
This kernel sucks. It's very buggy but is what is
kendong2 said:
adb remount
adb shell rm /system/etc/init.d/02memkill
then reboot.
Click to expand...
Click to collapse
It's OK managed to fix the usb on my laptop.
I am currently performing the third step...i really hope this works cuz I am getting really really horrible battery life right now...I get only about 8 hours with ocassional use...like listening to music, browsing, taking pictures, sms.
thanks for posting this thread.
Ill post the results tomorrow ( hopefully positive)
I noticed that using the overclock widget (even with the lower clock option when screen is off) also eats some battery, it definitely reduced my usage time on Android 1.5.
Could someone confirm?
I dont know what it is and why people have this bad battery drain.
I have the VillainRom 3.4 installed. Totally NO drain. I turned on Bluetooth and called several times. Battery drain is 8% in 12 hours .
I did not install any widgets. Pure standard custom ROM with newest radio.
Leeejohn said:
I dont know what it is and why people have this bad battery drain.
I have the VillainRom 3.4 installed. Totally NO drain. I turned on Bluetooth and called several times. Battery drain is 8% in 12 hours .
I did not install any widgets. Pure standard custom ROM with newest radio.
Click to expand...
Click to collapse
exactly my view.
I'm using HeroDroid and i had really bad battery drain problem. I'm a sort of heavy user and with bluetooth & gps permantly on, my phone had drained out by lunch time. After doing some tests, i have found that my problem was related to GPS. If i boot my phone with GPS off and left it at off, i get the same battery level usage as my original cupcake 1.5 ROM. Perharps you guys can try it and post your results.
rubik said:
I'm using HeroDroid and i had really bad battery drain problem. I'm a sort of heavy user and with bluetooth & gps permantly on, my phone had drained out by lunch time. After doing some tests, i have found that my problem was related to GPS. If i boot my phone with GPS off and left it at off, i get the same battery level usage as my original cupcake 1.5 ROM. Perharps you guys can try it and post your results.
Click to expand...
Click to collapse
I found that to help as well. In the last 3h10m it only went down by 4%. That's definitely a lot better than what I was getting before and with the previous ROM. I am using the new Autokiller and Overclock widget if that helps any and booted up with my GPS off and followed the steps mentioned in the first post.
hmm if its the case that the phone is "capping" the maximum amount of charge the phone can have then it should take longer to charge also
my battery life i kinda okay, lasts 10-12 hours with intermediate use, using battey graph app it took me 70 mins to charge from 40% to 100%
ill let it drain out tonight and see how long it takes for a full charge
it would be good if we could compare results with people with and without battery problems
I've just found that on the desire forum, do you think it will word on ours HD2?
vidler said:
Found this on another forum, I have done this a few times myself (do it whenever i flash a new rom because i always clear battery stats, can't hurt). Have found that it does top it up a fair bit. Before doing this i find my desire will drop to +-93% straight off the charger, however this keeps it 100% longer and i actually get to see the numbers 99-94%
Worth a go in my opinion because it only takes 5 mins of your time and can't hurt the phone... So any minor gain from this process is a win...
Hi *******, I understand your concern regarding battery life on your Nexus One device. The following steps should significantly extend the battery life on your phone. Please connect the phone to the charger with the phone powered on, and allow the phone to charge until the notification LED is green, indicating the device is fully charged. Disconnect the phone from the charger, and power it off. Reconnect the phone to the charger with the phone powered off, and allow the phone to charge until the notification LED is green. Disconnect the phone from the charger and power it on. Once the phone is powered completely on, power it off again and reconnect it to the charger until the notification LED is green. Disconnect the phone, power it on, and use it. You need to use this sequence only once. If the issue of battery life on our phone persists, I recommend you contact our HTC accessory department directly.
Click to expand...
Click to collapse
link to the original thread
http://forum.xda-developers.com/showthread.php?t=755903
my guess will be no on this. As i think that the batteries are different. and it might be something with batteries that are in droid devices perhaps.
extasy98002 said:
my guess will be no on this. As i think that the batteries are different. and it might be something with batteries that are in droid devices perhaps.
Click to expand...
Click to collapse
I'm trying right now i'll report as soon as I have an answer!
I think it should work as it's wiping battery stats in android
im trying it too as we speak
I'm pretty sure that calibration will not work currently in android properly. Cottulla posted a few days back that the battery driver is still incomplete and currently only supports reading battery state and that the write too part of the driver has not been implemented. When the driver is complete and has full read/write battery function this procedure should work better.
drewestate said:
I'm pretty sure that calibration will not work currently in android properly. Cottulla posted a few days back that the battery driver is still incomplete and currently only supports reading battery state and that the write too part of the driver has not been implemented. When the driver is complete and has full read/write battery function this procedure should work better.
Click to expand...
Click to collapse
thats' true i didn't know that . it may be impossible to wipe battery stats this way
....
My battery wasnt calibrated properly and wudnt charge over 90%. Someone in this forum told me to switch off and charge until green and then switch it on. Now my battery seems calibrated plus i got 2 days of use on moderate use
drewestate said:
I'm pretty sure that calibration will not work currently in android properly. Cottulla posted a few days back that the battery driver is still incomplete and currently only supports reading battery state and that the write too part of the driver has not been implemented. When the driver is complete and has full read/write battery function this procedure should work better.
Click to expand...
Click to collapse
but ive seen several posts of people calibrating their battery in winmo and reporting better battery life....idk maybe placebo
i will try this too. i myself had an issue today. i'm using chuckyrom right now. i use it at work so i can turn the "phone" off while at work. so it is in airplane mode. i only used the phone today to check the time and played some uno on a break. my battery stayed on 100% for 5 hours. so i turned the phone off, took the battery out for 1 minute. put the battery back in and turned the hd2 on. it was still on 100%. 4 hours later it was down to 94%. i just didn't think that a true battery reading. most days when i have the "phone" turned on at work i only have 10% battery left by the end of the day... just seemed odd to me. idk.
Well, I don't know if this works 'properly' or not but it's certainly had an impact so it's doing something right.
Prior to the calibration I could only charge to 95% or so. Phone now seems to be charging to 100% all the time which is good. Battery life also seems great, not sure if this is down to the calibration or not as I moved to Darkstone V2 (16/08/10) release the day before so don't have a baseline.
FYI, as I type this I'm on 49% battery remaining after being unplugged for 10hrs. Fairly light usage, couple of calls; some texting but quite a lot of browsing and XDA App on 3G and WiFi.
Amazing progress the devs are making. Have been running various builds of Android for a week or so no and haven't yet had to revert to WiMo.
Sent from my HD2 using XDA App
Edit: Couldn't figure out how to take a screenshot without plugging in (and hence losing the 'time since last unplugged stat') - so here's a ropey photo for the inevitable 'screenshot or it didn't happen' remark Seems I've been unplugged for 13hrs not 10... where does the day go?!
Anyone able to do this with mattc Leo + Froyo w/Sense? The charge indicator LED never changes to green.
retain81 said:
Edit: Couldn't figure out how to take a screenshot without plugging in (and hence losing the 'time since last unplugged stat') - so here's a ropey photo for the inevitable 'screenshot or it didn't happen' remark Seems I've been unplugged for 13hrs not 10... where does the day go?!
Click to expand...
Click to collapse
Yeah, its hard to remember to take a screenshot before you plug it in (or in my case...reboot the phone)
You may want to try BatterySnap...its a free app in the market which gives you a great battery widget, plus a lot of really useful graphs and information.
I upgraded to Froyostone on the 12th...thats why the information is only going back that far...but as you can see, 18-19 hours a day at moderate usage is what I am getting on a regular basis
Cheers
Hey guys, I'm trying this method but my battery won't charge past 99%. any suggestions?
interfreak said:
Hey guys, I'm trying this method but my battery won't charge past 99%. any suggestions?
Click to expand...
Click to collapse
Power the phone off...then charge till you get a green light (Maybe even for an extra 10 minutes or so)...power the phone back up and plug into your charger. now it should charge up to 100%
I dont know if the battery itself is limiting the charge, or if its just the battery meter that is not displaying correctly...Anyhow, the above method corrects it for me whan this happens on my phone.
Thanks matey . I've only had my HD2 for five days but thanks to the awesome resource that is the xdadevelopers forum, I'm successfully running Android on my phone. :-D
AND This is my first WM device, have had iPhones for the past 2 years lol!
agentaaron said:
Yeah, its hard to remember to take a screenshot before you plug it in (or in my case...reboot the phone)
You may want to try BatterySnap...its a free app in the market which gives you a great battery widget, plus a lot of really useful graphs and information.
I upgraded to Froyostone on the 12th...thats why the information is only going back that far...but as you can see, 18-19 hours a day at moderate usage is what I am getting on a regular basis
Cheers
Click to expand...
Click to collapse
Cheers for the heads up - that looks like a great app! Downloading now...
quick question , do we do this while runnning android or windows mobile?
I did it from Android and seems to have worked a treat.
alantak said:
Anyone able to do this with mattc Leo + Froyo
w/Sense? The charge indicator LED never changes to green.
Click to expand...
Click to collapse
Just to confirm, I'm on ChuckyDroidROM with mattc Leo + Froyo w/Sense 1.5b.
- I can charge to green when the phone is powered off.
- I cannot charge to green in ChuckyDroidROM WM (says 100 in Battery screen, just no green LED)
- I cannot charge to green in mattc Leo + Froyo
w/Sense (stays at 98 in Battery screen)
Hi i am on ChuckyDroid ROM 2.12.50 Radio and darkstones 2.1 build.
have don successfully the trick in post 1.
Now having 100% in the taskbar and i will report if the battery life have improved.
I am LUCKY to get 8 hours of battery life on my brand new stock Epic.. I usually get 4-6 hours. It will NOT last through a normal day of work without putting it on the charger around lunchtime. I take it off the charger around 6:30 AM and I am usually home by 4PM and have to immediately go and charge my phone.
Even if I put it on airplane mode, kill all running applications, and shut the screen off to standby, the phone still seems to suck battery life down very quickly (~5% in 20 minutes on airplane mode, wtf???).. So airplane mode doesn't help.. And I really DON'T want to put it in airplane mode to conserve battery because then my phone is completely useless -- it won't even ring when my wife calls..
Is my battery defective? Please tell me it is... This can't be right..
Are there processes still running that use lots of CPU, even when the stock sprint "task manager" program shows that nothing is running? Is there anything I can do to improve this if I root the phone? How about custom roms? I would really like to run Froyo/Gingerbread anyway.. If anyone has any suggestions to help to make my battery life not such an EPIC FAIL, I would greatly appreciate it.
EDIT: Also wanted to comment on the SLOW CHARGING. With the stock Samsung wall charger, it takes at least a couple of hours to get a full charge. With a USB cable plugged into a PC overnight, it only gets to about 50%. Compared with my previous phone, the HTC TP2, this is really really REALLY slow. It charged in 30-60 minutes and the battery lasted much longer.
I did notice that Samsung only provides a 0.7 amp charger, versus a 1.0A charger for the TP2. Why does Samsung limit the charge current like this? And apparently there is no nueBattery mod driver for android
UPDATE: JuiceDefender looks very promising. Installed the free version and my battery is only down to 95% after one hour. Thanks for the suggestion.
FWIW, I'm getting about the same 8ish hours on mine running DK28. I'm losing about 4% an hour without touching it. I'm seeing some people claiming insane battery life (18 hours with heavy browsing on wifi) I wish I knew how they were managing that.
Wait, it won't even ring when you're wife calls? and you're complaining?
First, the airplane mode means you switch the phone to airplane mode first then switch it back so you won't have time without signal problem which can cause battery drain.
I am able to get 10+ hrs at least by doing the following
1) use airplane mode trick so no TWS
2) use titanium backup to remove a bunch of stock junk
3) use titanium to freeze certain applications (DRM, MediaHub, Qik etc)
4) Have as few applications as possible that constantly pull data
Just yesterday I had 1 day 17 hours before switching
Yesterday when it finally gave up the ghost with the battery indicator blinking i checked my stats.
I had 1 day, 17 hours unplugged. Screen time was around 2 hours and some minutes. I had 45 minutes of talk time.
One thing i will add is I purchased a charger with two batteries off Ebay. Previously when charging with the stock charger as soon as I pulled it off the charger it would read 97%. With the seperate charger it reads 100% for quite awhile before it starts to drop.
And for the record I purchased this charger and two batteries of Ebay for a winning bid of $0.01, plus $9.95 S&H. It was a steal in my opinion.
Unless you are getting near 12 hours of battery life, one of 3 things is occurring:
1) You are using the phone an insane amount
2) You messed something up
3) The battery is defective
For the record, its almost always number 2.
I suggest doing a Factory reset, which will wipe everything off the phone. Then without installing anything or setting your facebook to update every 15 seconds, see how long the battery life lasts. If it is still only 4-6 hours, then your battery is most likely defective.
well of course it won't ring if your wife calls if its in airplane mode. That radio is turned off.
8 hours? That's it? I wouldn't call that normal, but that's just me...
I just plugged my phone in after 4 1/2 days (108 hours) running on a stock 1500maH battery, running Quantum Rom 1.5 (DK17), no special apps running to disable data (aka Juice Defender, etc.), not in airplane mode at all, with the DRM software running, in other words, a more or less 'Stock' configuration (taking into account any differences in the base Rom).
Granted, I barely used the phone in the last 4 days though
muyoso said:
I suggest doing a Factory reset, which will wipe everything off the phone. Then without installing anything or setting your facebook to update every 15 seconds, see how long the battery life lasts. If it is still only 4-6 hours, then your battery is most likely defective.
Click to expand...
Click to collapse
I'll do that. For the record, I've got fbook set to never update, and seesmic once every 6 hrs.
Koadic said:
8 hours? That's it? I wouldn't call that normal, but that's just me...
I just plugged my phone in after 4 1/2 days (108 hours) running on a stock 1500maH battery, running Quantum Rom 1.5 (DK17), no special apps running to disable data (aka Juice Defender, etc.), not in airplane mode at all, with the DRM software running, in other words, a more or less 'Stock' configuration (taking into account any differences in the base Rom).
Granted, I barely used the phone in the last 4 days though
Click to expand...
Click to collapse
LOL at screen on for 52 minutes total. That is 11.5 minutes a day.
muyoso said:
LOL at screen on for 52 minutes total. That is 11.5 minutes a day.
Click to expand...
Click to collapse
Like I said, barely touched my phone in the last 4 days... been feeling a little under the weather so have been at home a lot and in bed doing all my internet stuff and gaming (pogo) on a laptop instead of on my phone.
Since I updated to the leaked Froyo, my battery life has plummeted. It lasts maybe 1/3-1/2 as long as it used to. Turning off 3G has helped immensely though, so that must be the culprit. I used to be able to leave 3G on while at work and make it to bedtime before having to charge it. Or if I shut it off at night (which I usually do), it would make it through my commute to work the next morning. Now, I'm lucky to get through the work day unless I turn off 3G. Huge difference in battery life for me since updating. I'm hoping they fix this in the official release of Froyo.
Well, I've recently found out that if you flash via update.zip while the USB is plugged in, you'll mess up the battery calibration of your device. This is what I did, and i'm pretty sure the cause of my problems. I did find a fix, and here it is:
siliconaddict said:
This is the procedure that works for me:
The following steps should significantly extend the battery life on your phone:
1. Let the battery drain close to empty (5% or less).
2. Connect the phone to the charger (AC or USB, USB is better) while powered on and allow the phone to charge until the notification LED is green, indicating the device is fully charged and untill the voltage is at least 4187mV. A higher voltage like 4192mV or more is even better. Use a tool like Overcharged or Battery Indicator to monitor this. Note that a green notification LED does not automatically mean that the voltage is good too.
A higher voltage means in practice that it will take longer to discharge, a lower voltage means that the battery will discharge a lot quicker! The difference can be quite significant!
3. Disconnect the phone from the charger and power it off.
4. Reconnect the phone to the charger while powered off and allow the phone to charge until the notification LED is green. The notification LED may turn green immediately. Leave it on the charger for another hour.
5. Disconnect the phone from the charger and power it on.
6. Once the phone is powered on completely (has restarted fully) wait 2 minutes and power it off again.
7. Reconnect the phone to the charger while powered off and allow the phone to charge until the notification LED is green. The notification LED may turn green immediately. Leave it on the charger for another hour.
8. Leave the phone on the charger and reboot into the ClockWorkMod recovery menu and wipe the battery stats via -> Advanced -> Wipe battery stats.
9. Disconnect the phone from the charger, restart the phone and start using it as normal.
From then on always let the battery drain close to empty (5% or less) as often as possible and then charge untill the voltage is at least 4187mV. A higher voltage like 4192mV or more is even better.
Normally you will have to do this only once. However, on all Android ROMs, if you flash a ROM while charging or during the first boot screen on, first boot mucks up the levels Android thinks the phone is at, i.e. Android will think you’re at 100% when maybe you’re only 90% or whatever. So in theory you will need to repeat this every time you flash a ROM while charging!
Better is to make sure the battery is charged before you flash a ROM and just remove the USB/charge cable before you flash a ROM. Put it back in (if you must) after the first boot screen (when the custom screen or whatever shows).
Click to expand...
Click to collapse
There is a shorter version that also seems to work well:
vidler said:
So combining the two bits of info we've compiled, the best way to calibrate your battery is as follows
1: Charge phone whilst on till LED is green.
2: Disconnect phone from charger, power it off.
3: Reconnect to charger with phone powered off and allow to charge till LED is green.
4: Disconnect the phone from charger, power it on. Once completely powered on, turn it off again and reconnect to charger until LED is green.
5: Reboot into recovery (back button held at same time as power button) and wipe battery stats.
Battery should now be calibrated.
Click to expand...
Click to collapse
From what I've been told, you don't have to wipe the stats (you need root to do that) but it helps if you can.
I think this may also stem from interrupting the inital charge of the device. I know I did this on both my wife's device and mine (plus my added fubar of flashing with the USB in). Anyway, hopefully I can report some good news tomorrow.
If y'all are really interested in reading a 51 page thread on this, go here: http://forum.xda-developers.com/showthread.php?t=755903
I get 4 or 5 hours if that. I can barely make it to 6. But i probably use my phone more than the average person. Because i take public transportation and browse, stream, email and have 4g connected on my commute back and fourth.
diego1985 said:
I get 4 or 5 hours if that. I can barely make it to 6. But i probably use my phone more than the average person. Because i take public transportation and browse, stream, email and have 4g connected on my commute back and fourth.
Click to expand...
Click to collapse
I've been running JuiceDefender for about 5 hours now and I am loving it.. I still have 75% and I can still receive calls just fine.. It turns off data when the screen is off, but turns it on at scheduled times (default is 1 min every 15 min) so that your emails/twitters/etc can update like normal. The paid version has even more features so I bought it..
Never mind im dumb for not reading his post. Already answered my question sorry.
sleebus.jones said:
Well, I've recently found out that if you flash via update.zip while the USB is plugged in, you'll mess up the battery calibration of your device. This is what I did, and i'm pretty sure the cause of my problems. I did find a fix, and here it is:
There is a shorter version that also seems to work well:
From what I've been told, you don't have to wipe the stats (you need root to do that) but it helps if you can.
I think this may also stem from interrupting the inital charge of the device. I know I did this on both my wife's device and mine (plus my added fubar of flashing with the USB in). Anyway, hopefully I can report some good news tomorrow.
If y'all are really interested in reading a 51 page thread on this, go here: http://forum.xda-developers.com/showthread.php?t=755903
Click to expand...
Click to collapse
Decided not to quote the whole thing but I'm in the process of doing this right now! Took 2 hours to drain my batt from full (running everything and keeping my phone searching for gps constantly in a place where it would also be searching for signal makes quick work of a battery!).
knyque said:
Wait, it won't even ring when you're wife calls? and you're complaining?
Click to expand...
Click to collapse
*golf clap*
diego1985 said:
I definitely need to try that out. Can you still receive calls or no?
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
Yes, with juice defender I can receive calls and my gmail/twitter/facebook/etc. are all already up-to-date whenever I pick up my phone. It works exactly as before, except my battery is not constantly being drained now.
I guess the downsides are that I might not get a new email notification for 15 minutes, and that there is a service running in the background that may cause some slowdown. Neither has been a problem for me so far. I highly recommend this application for Epic 4G owners. Problem solved, basically.
I usually get 12hrs with moderate use (~2hrs with screen on, half of that is usually on the browser). I turn background data off bc I don't have a twitter and I rarely check Facebook so when I do I just use the browser.
I also noticed that wifi burns more battery on DK28, on 2.1 I would hardly lose any battery on standby with wifi, now I get a 3-4% drain per hour... But with 3g on now I lose less then 1% an hour, it used to be a battery hog.
I currently have a Android 2.2 nand with magldr on my hd2.
I'm having a couple issues tho.
I'm having really bad battery life. I always let it die before I charge it but ill take it off the charger when it has a full battery and within 4 hours my phone will die. Granted I use it a lot but that's not good.
I'm also having problems with the TS. it freezes, buttons get "stuck" a bunch of issues with the TS.
help greatly appreciated.
Sent from my HTC HD2 using XDA App
Still happening..
Sent from my HTC HD2 using XDA App
For bad battery life, try a different radio. Although I don't suspect that it's the radio, it's just you using it too heavily as to why battery drains quickly.
For TS try a different kernel/build.
eyeisdasteve said:
I'm having really bad battery life. I always let it die before I charge it but ill take it off the charger when it has a full battery and within 4 hours my phone will die. Granted I use it a lot but that's not good.
I'm also having problems with the TS. it freezes, buttons get "stuck" a bunch of issues with the TS.
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Hi,
First of all what build are you using? Try calibrating your battery, steps here:
http://forum.xda-developers.com/showpost.php?p=8993227&postcount=4
For the touchscreen freezes, did you try another rom? Im using tytung's Nexus HD2 Gingerbread, link in my signature and dont have problems with touchscreen. Maybe try this one. Is this happening in WM as well or only in Android?
eyeisdasteve said:
I'm having really bad battery life.
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Click to collapse
This is what I had, too. What I did:
calibrate battery as mentioned (charge full (red -> green led), shut off, charge again full, put out and in battery, charge again full, start phone with android)
Install Gingerbread-Build with GPS battery drain fix - Currently I have http://forum.xda-developers.com/showthread.php?t=905060 (tytung's gingerbread hd2) with its known errors.
disable bluetooth when not used
When enabling bluetooth, I've got 60-70mA. With disabled bluetooth and disabled wlan I got 2-3 mA. When WLAN enabled it's mostly 2-5 mA but sometimes higher.
(GPS enabled!)
I hope, the bluetooth drain will be fixed soon....
Does anyone have any suggestions on what I can do to test which one might be bad? Any app you know of that can monitor things and tell me if a rogue app is killing the battery or if the battery is bad?
I was running mik 1.1 and was using it pretty heavily with gaming and downloading stuff. The phone died after about 7 hours. I thought that maybe the rom or cwm or something else might be killing the battery. Something strange though is that, like I said, I ran the battery until the phone shut off. Then I left it off and put it in a wall wart charger for about 8 hours and the status light was still orange. My gf had the phone and told me once she left it plugged in overnight and in the morning it was only at like 50 something percent. I thought maybe the charger went bad so I gave her another one and she didn't say anything else about it. I'm starting to wonder if maybe the phone's battery has a weak or bad cell. I kinda doubt that there's something wrong with the charging circuitry of the phone but there could be, anything is possible. I will probably take it to the repair center and tell them about it and see what they say. I tried looking on htc's site for oem replacement batteries but couldn't find anything. I found lots of aftermarket but I didn't want to go that route.
I don't know if it would not be a good idea or not to try and use my original evo battery just flipped over. I suppose if that's the only thing I have to try and troubleshoot this problem then it will have to do.
Can anyone give me suggestions or has something similar happened to you?
Now let me see if I can find that evo battery..........
Spare parts, in the market if not on your rom by default, had a battery information tab that will indicate battery health as well as what kind of plug the phone detects when charging (usb, ac, or none)
Sent from my PG06100 using XDA App
Like danaff37 said, spare parts can be useful. Also try CPU Spy, free from the market, which shows what % of the time your CPU spends at each frequency, but this actually more relevant for determining if your phone is properly sleeping..
For proper charging you can get an app like CurrentWidget or Battery Monitor Widget which tells your the current consumed during usage or current injected during charging, as well as the voltage in mV. Full charge should reach around 4200 mV, and when charging the current should be around ~800 mA for lower % battery left.
Thanks for your input. I found the evo battery and did the same thing as before. I ran it until the phone shut off and then put it one the (same) charger and went to bed. About seven hours later, it was still orange charging. Both times the phone was off. Now something that could be a possibility is the charger is weak or bad. When I put my evo on it, it charges seemingly fine. I should try using the battery until it shuts off again and use a different charger and see what happens. Six to eight hours charging, with the phone off, coming from a dead battery, on a Motorola charger that has a rated output of eight hundred milliamps at five volts. I have others at different output rates and a two amp charger intended for an ipad. Some might say that the charger is too much for the phone. The charging circuitry only pulls as much amperage from the charger as the phone was designed to. Now on the other hand if I put a smaller output charger on, say one hundred and fifty milliamps, it will take longer to charge the phone than usual. "They" say trickle charging is better. Whatever. I will post my results if I find any. Or, I just might trade the phone in for a nexus s or an evo 3d.
I was just about ready to throw in the towel and say the phone was defective, but then things started happening. I will fill you in on what I have done in the meantime. Okay so the flipped over evo battery kinda works but not completely. It will charge but not to 100% and green light. To test this, I took the evo battery out of the shift. It didn't seem to want to go more than 98 or 99%. I put the battery into the evo and after a few minutes the light went green. This was initially off. Then I booted the evo and let it go to sleep. After it booted the light went orange then green after a few minutes. Okay so the evo battery is capable of going to 100%. These charging tests were done with a different charger.
I forgot to tell you, I let the evo battery charge while I was at work and the phone was off. So the battery was charging roughly twenty hours and still no green light. I suspect that even though the positive and negative terminals aligned with the correct tabs on the shift, the center two contacts must be different internally than the shift battery. I speculate that those center tabs are for the battery and phone to communicate to each other during it's charging state. I am guessing that the battery tells the phone it is fully charged and to go trickle charge and perhaps the evo battery wasn't communicating to the phone or the phone didn't know when to say it is done charging. The battery never got hot either.
The shift was rooted, running mikshift 1.1 and the latest clockworkmod recovery. Here is where I suspect that there still might be charging bugs with that setup. I used the pcxx.zip file that when booting into the bootloader, would flash the phone back to stock everything. After trying this and assuming that the phone was back to stock, I kept going with my what the hell is going on with this phone battery charging test. A note about the flipped evo battery. Yes it will work in a pinch but it won't charge properly. Luck has it that the notches in the battery and phone allow it to work in a shift. Only thing is, the shift battery won't work in the evo. The tabs are on the wrong side and the phone's tabs won't allow the contacts on the battery to meet up with the phone's terminals.
Okay, where was I? Trying different chargers wouldn't make the shift green light full charge. I tried the same chargers on the evo with it's original battery in and it would green light after a few minutes on or off. There wasn't anything wrong with the chargers. Oh and another note, while using the battery monitor widget, I noticed that both phones wouldn't pull more than a little over three hundred milliamps of power from the charger to the battery. Interesting to know how much it really pulls from the charger.
Anywho, I tried something different for my process of elimination testing. I actually ruu flashed the shift back to factory and guess what happened..... The battery and phone were charging both on and off all the way to green full charge at 100%! I think I'm getting somewhere with this! All my luck, either it is a known bug somewhere in the forum in a place I haven't stumbled across or I'm the only one that this is happening to. It doesn't really matter I guess.
My conclusion, which isn't scientific by any stretch of the imagination, is that the phone isn't truely back to factory unless you ruu it. The pcxximg.zip doesn't put everything back to stock. I haven't narrowed it down to what is causing this behavior. I don't think it is root. It could be cwm recovery or the rom or both. I didn't try the stock rooted zip either. I suppose I could go further with this investigation but I am too lazy to now. I might root it again and just leave things stock rooted. I might activate this phone in the morning and run it all day tomorrow and see how it acts. I will have to charge it a few times during the day to keep the levels up when I really use the phone heavily. I've written enough for now. Does anyone have anything to ask or add to this topic?
Since the latest update to CWM phone-off charging finally works again but the light never turns green. It charges fully but with the phone off the LED never turns green. It's not just you.
EDIT: If this is not the actual question I apologize. The posts were far too long to actually read
^ Shift Faced
OK. I thought something might have been broken.
Forgive me, I am truly a newbie to Android after having a BB for 8 years. This battery thing is killing me. I am on my 2nd Evo Shift, the 1st one wouldn't last for more than 2 hours with barely any usage so they gave me a new one. This one barely lasts 5 hours. I am barely running anything. I took it into the store and they thought I was going to be running all these programs, but I kill everything. They told me the "battery trick" about turning off the phone and unplugging it and plugging it back in 10 times so I did that but I am not getting any more life out of the battery. My display is constantly using at least 70% of the battery it says even if I turn it down very low or if I set it to choose its setting. Do you have any advice for me? I am not running a task killer, I kill all the programs I am not using. I have no widgets running because I am afraid to use the battery, I only have 2 screens out of the 7 with things on them. I am being help hostage by my cool phone that I want to use but am scared to kill the battery! (sorry for the long post)
Ok if you use a lot apps just close them after (for stock 2.2) . Even on stock you can literally stream music and movies for about 4-6 hours. (sometimes a lot more) . The background info that runs doesn't use a lot of juice , but if you want you can go to your home screen any of them hit menu (but not with the app drawer open) select settings go to accounts and sync turn off background info and just turn it on manually when needed such as the android market . You can also turn off the auto sync and just manually choose to sync , like in the clock (and gmail etc.) it will say no weather after you click it , just hit menu you will see a little sync button option to sync and voila you have weather . So when you visit the market it will automatically ask you to turn it on (background info as will all apps that need this) . And the screen on any android is a battery killer . So when not using your phone simply tapp your power button to turn your screen off and lock (and to keep from pocket dialing lol) . But if all you do is text , emails , and web surfing (surfing drains more but no where near as much as streaming) you can literally do that all day , the screen will actually suck the most power . If manually turning off your apps is too much . Just turn your phone off (not just the screen) and on . If a new app didn't turn off after you start your phone back up you know that will be a problem later . So when not using your phone turn off your screen it will last soooo much longer . I only make a call or two and a couple of texts maybe a few minutes of internet with opera mini . My battery lasts over 24 hrs , but I barely use my phone . Hope that helps .
Sent from my HTC Vision using XDA App
BTW if you have a bunch of apps running in the background video games etc ... and you charge your phone all night and in the morning it is not charged . You should probably turn your apps off . Or simply power your phone off which shuts off most apps . Then turn it back on . The phone should not take all night to charge , it should only take an hour or 2 . 3 hours max .
Sent from my HTC Vision using XDA App
i suggest watchdog lite,it monitors cpu usage and alerts you when 1 uses more than your max threshold.if this helps,please click thanks.
When you changed ROMs, did you do it with a full charge? If not, your battery stats file is probably messed up.. Ive used Battery Calibrator free from the market in the past to fix that problem.. I believe a brand new battery on the Shift shows about 4200mV when fully charged or just slightly below that.. Run the app, when it gets close, calibrate (which essentially just deletes the battery stats file and creates a new one)