yashsingh1/xdaforums huggingface dataset:
[Nexus One General] pjcforpres:
Yes, raise your hand if the first time you charged your N1 you ran the battery all the way down, turned the phone off(battery pull is best) then put it on the charger and let it get a full charge with the power off?

If not, you didn't properly condition the battery meter and the battery itself. It can be saved, not to worry, just run it all the way down(and I mean the phone shuts itself off all the way down) turn it back on, if it boots all the way up let it go until totally dead again. Then, pull the battery, put it back in after 30 seconds or so, put it on the charger without turning on the phone, and let it charge for a couple hours/overnight to get a full 100% charge on it. Take it off the charger, then turn it on, tada!
[Nexus One General] SANTilt:
When I first got the phone, I completely drained the battery by continuously turning the phone back on until it wouldn't boot. I only had to try booting it three times for this (unlike my G1, which took about ten) to happen. I take the battery down to the single digits every night before charging it over night.

The biggest difference I noticed regarding battery life was when I stopped using task killer to FS programs. That and when I can keep from tinkering with the phone.
[Nexus One General] Redestwing:
I ran mine down soon as I got it and then began conditioning. Never understood why they want you to charge soon as you get the phone when the battery has around 50%.
[Nexus One General] kam187:
Although it shouldnt really matter, I've found with my galaxy that charging with the charger does make the battery last longer. I'm now using the charger whenever possible on my N1 - at least for my overnight charge.

Its probably because the charger outputs 1 amp (or 1000mA) and USB can only output 0.5 amps (os 500mA). If the phone is on as well - it will go to full power speed while on the charger (and screen is on) so i guess that draws quite a bit too.

On another note, you really should do a full charge and let it die totally at least once to calibrate the meter. Otherwise comments like 'it dropped 5% right away' don't mean anything.
[Nexus One General] awesomeindeed:
Mine loses about 10% an hour just idling. I stopped syncing my exchange email and set facebook to refresh every 4 hours and it didn't have a positive impact. When I run a live wallpaper it gets even worse. I don't have many apps installed, and none that refresh in the background except facebook and weather.

Running the stock live wallpapers eats my battery a little faster than that, but running the starfield one consumes battery like no other and makes my phone very very warm to the touch. Really hoping I don't have to send this thing back.
[Nexus One General] BigDamHero:
At this point I'm willing to try anything. My battery doesn't even last the day. However, isn't there some kind of warning against discharging Lithium Ion batteries like this? I'm sure I read somewhere else on this forum that it reduces their capacity if you drain them completely. Wikipedia would seem to at least partially agree.

I await enlightenment!
[Nexus One General] Amdathlonuk:
Don't believe everything you read on Wiki.

Remeber that's just info posted by all and sundry....it could be right, but probably mostly wrong.
[Nexus One General] BigDamHero:
Yes believe me I know the risks of relying on Wikipedia :-p I was just looking for confirmation that it was incorrect or not applicable in this case. I'm running down my battery as we speak. Now I actually WANT to run it down it seems to be performing ok!
[Nexus One General] pjcforpres:
I wouldn't do his method, while it is a quick way, I would follow the method I posted, run the battery down til the phone turns off, then turn it on and let it go until it dies again. Pull the battery, put it back in, then charge it with the phone off until fully charged (a couple hours or overnight) Unplug the phone before turning it back on... as well, ArmonsRA has a battery stat wipe function, not sure if it works on the Nexus or not. I can't recall the exact route using Armon's, I want to say you put a full charge, wipe the stats, then reboot. Once rebooted, run all the way down, then give a full charge, and don't worry about turning off the phone.
[Nexus One General] kam187:
No you're right. A deep discharge for a Lithium Ion battery is bad. They have protection to cut out before this happens so its fine to let it discharge till the phone dies.

You should however put it back on charge fairly quickly. Quickly means, dont leave it in the phone totally discharged for 5 days! In that case no protection will help it as it'll deplete over time.

Thats also another reason why if you leave on holiday for somewhere and dont take your phone you should REMOVE the battery from the phone.

EDIT: missed the bit about continously turning the phone on lol. Let the battery deplete normally in the phone. For the same reasons above, and also there is a big current spike when the GSM turns on. loads of those is not good for it like that.
[Nexus One General] gunnner:
So you found that actually running a task killer program actually made battery life worse? Which one?
[Nexus One General] BigDamHero:
No I wasn't going to do this part of it. Just seems like its asking for trouble

Thanks for the advice everyone. I will follow pjcforpres's method, turning the phone back on only once. I've also got a US to UK adapter today for my power adapter so I can chrage it off the mains (and not the USB). I can't see why this would make a difference, but I note from the phone's specs that it charges at "480mA from USB, at 980mA from supplied charger". Perhaps this makes a difference.

I know there is some difference in charging from USB. I used to have a HTC Wizard. Once it discharged to a certian level it would no longer charge from the USB. You had to connect it to the mains to get it charging again. Once again I'm not entirely sure why this is the case but maybe it does affect battery performance?

Anyway once again thanks for the info. I'll let you know how it goes.
[Nexus One General] pjcforpres:
Many smartphone batteries are designed to charge at a certain rate and using different rated chargers can mess with them. For example, if you send a BB in on warranty because of battery issues, and the battery log shows you have been using a charger that isn't rated properly, they will refuse the warranty.
[Nexus One General] Amdathlonuk:
I should point out.....

I didn't order a UK charger with my phone.

I charge it ONLY on USB.
[Nexus One General] blisk:
This helps because it resets to the software in the phone what the max level of depletion of the battery is. This is why its good to *sometimes* run li-ion batteries down all the way otherwise the battery has something like 30% more life in it but the software thinks its zero. Battery life changes over time so every now and then you need to re-calibrate it. This info from HTC matches what I've understood about Li-Ion batteries.

This last part is my own experience.. but don't *consistently* (day after day) drain the battery and only recharge when its 10% or whatever.. I have an old phone that definitely took some hits on battery life from me doing that.. or at least i think it did.
[Nexus One General] :
Did we time travel to the 80's or did google skimp and use nickel cadmium batteries?
[Nexus One General] uansari1:
With these Li-ion batteries, this isn't as much of an issue as people are making it out to be. With these batteries, don't let it cycle too deep. Once every couple months, or when you notice battery life isn't as good as it used to be, fully discharge the phone, leave it off, and plug it in overnight. That's all there is to it... these are really easy batteries to take care of.

On a side note, I've currently got my backup phone (Razr) and G1 batteries charged to about 40-45% and in a plastic bag in my fridge. This is the best way to store them longterm to maintain condition and longevity.
[Nexus One General] pjcforpres:
LOL!

No, they didn't skimp, but just because it is Li-Ion doesn't mean you don't need to do this so that the battery meter gets set properly. It isn't so much about conditioning the battery itself, rather the battery meter so that the low point and high point get registered properly.

This is exactly what I have been taught to tell customers in the training sessions for BB and HTC I have attended.
[Nexus One General] :
Ah ok, that I can get behind.

=P
[Nexus One General] ash99:
Please treat the following as they are, just observations on battery depletion if the phone is not used. Ive hardly touched the phone:

- On 2G (I've got the 3G problem O2 UK)

- No data intensive programs etc running, weather / news to sync every 4 - 6 hours

- Bluetooth is off

- Screen is at its dimmest setting to timeout after 30 seconds

Apps / Widgets services running:

- Fring

- Executive assistant

- Vizbattery

- the Weather channel Widget

- Audio Manager

- DoIt.im

- Adhan

I've just averaged 20% depletion over 5 hours doing sod all other than checking the battery 10 odd times by looking at the Vizbattery widget on the homescreen

Not really happy with that so i'm gonna slim down some more widgets, exit fring, disable heptic feedback and see if that helps. Can't do with losing 30% odd in a day (12 hours) when I haven't done anything with the phone and most of the things are off anyway.
[Nexus One General] hassan:
I would only use USB to top up a charge. Usb can only provide up to 500 mA. Charger shipped with N1 is 1A.

1A = 1000 mA. Your phone will never really charged the way it should. Charger does play a big role when it comes to battery life.
[Nexus One General] SANTilt:
Advanced Task killer. Running it wasnt the issue; continuously killing apps seemed to adversely affect battery life. I stoped using it two days ago, and noticed an improvement in battery life. I read that 2.1 automatically sleeps apps and when you mess with it manually, it creates more work for the CPU.

Dunno deffinitively, but it's noticeably better now. still not spectacular though.
[Nexus One General] bofslime:
Battery widgets have been known to greatly diminish battery life. Cyanogen had one enabled on the lock screen of the G1 ROM for a while, it was removed because of this.
[Nexus One General] bofslime:
No to mention causing problems with scheduled alarms, update pulling etc, and generally bad for performance because your apps have to load when you want to run them. App killing is bad, for just about everything.
[Nexus One General] ash99:
Thanks for the information. :)
[Nexus One General] dnar56:
USB charges at about 400mAh and home charger charges at about 900mAh per hour. Its on the Google.com/phone site
[Nexus One General] DocRambone:
Use a dark background as wallpaper. Amoleds power consumption is directly proportional to wallpaper colour. Black is best and use use should avoid blue colours as these shorten amoled screen lifetime.
[Nexus One General] uansari1:
Please post where you're getting this information from.
[Nexus One General] DocRambone:
http://xdaforums.com/showthread.php?t=617559
[Nexus One General] uansari1:
So why avoid blues? Based on your information, they would be the next best thing to black...and we should stay away from reds, yellows, greens, etc.
[Nexus One General] DocRambone:
Check the conclusions in the article. Short wavelengths (blue) seem to shorter amoleds lifetime.
[Nexus One General] uansari1:
Yeah, I just skimmed through it. Blues have typical lives of 12,000 hours. Reds and greens have higher lives. White uses the most power. Got it.

12,000 hours translates to 500 days. Realistically, that much use would take YEARS! I don't think we have anything to worry about. If you want to save power, don't use white backgrounds... that's pretty much the important point to be taken from that pdf.
[Nexus One General] NisseGurra:
Yes, white (light) wallpapers will kill your battery.
[Nexus One General] pjcforpres:
Look at the color spectrum... on the far left(ie lower out put needed, and closer to infrared) it goes black, red, orange yellow, green, blue, indigo, violet, white light (far right, most power, and closest to ultraviolet).

So, blue light takes more power than red, yellow, green. The best is black, then red, and so forth. Just think of ROYGBIV. Black is on the far left and white would be on the far right, since black in this case is the absence of all color, and white is the presence of all color.
[Nexus One General] catbear:
Interesting to know. I have been constantly killing the apps in an attempt to preserve battery life. I will stop doing this and see if the battery life improves. What about doing a clean kill all when the phone starts up? There are so many unwanted app running in the background, do they really consume no battery at all?
[Nexus One General] :
Apps are hibernated in the background, not running.

Unless they are apps that are actively doing something, like music player, or transferring datat, etc.
[Nexus One General] catbear:
I am also confused on this. So would it be better off using the UBS charger than the supplied wall charger? is lower mAh better?
[Nexus One General] pjcforpres:
It is always best to use the supplied charger, since it is going to be the exact amps, voltage, and ohms.
[Nexus One General] SANTilt:
Okay, I am now impressed with the Nexus One's battery.

So today, after the phone completed its customary overnight charge, I changed from a live wallpaper (which I'd been using since I got the phone) to a wallpaper that updates every hour (WorldTour app).

-I had GPS turned off all day (same as the last couple of days),

-News & weather widget set to update every three hours

-FB app set to update every 30 minutes, but it doesn't update at all (fail).

-SetCPU set to "ondemand"

-Sync set to "auto"

-Screen brightness set to "auto"

-Used the phone moderately throughout the day, checking weather radar often (big storm coming), a couple of phone calls, FB updates, browser a few times, lots of Gtalk conversations, kept checking the battery status, Twitter, Gmail, and streamed Pandora for over three hours straight on 3G.

Result: After 12.5 hours of being off the charger (a first), the battery is sitting at 19% (!!!)

I now know how these other people are getting their batteries to last so long! Live wallpapers SUCK battery life like an eager date, and Killing apps is bad. Those are the two main drains I noticed.

Right now, the main drains on my battery are:

-Display 60%

-Mediaserver 9%

-Cell Standby 8%

-Phone idle 6%

-Android System 6%

-Android OS 3%

-Voice calls 3%

-News and Weather 2%

-Browser 2%

Now THIS kind of battery life I can LIVE with! This is MUCH better than what I've seen until now.

:D
[Nexus One General] kep0ne:
Just finished conditioning the battery last night. Hopefully I get some type of result like the poster above. I'll post results at the end of the day.
[Nexus One General] stewart1988:
I havent charged it for 2 days... Well its now on red.

GPS turned off. Made about 3 calls (Max 5mins each) loads of texts and been on Facebook chat and MSN throughout both days for about 3 hours in total.

Turned off most of the autoupdates like weather, news, facebook.

Updated Facebook and Twitter a few times and checking out the weather and news app a few times.

But I am using the Starfield live wallpaper so could maybe save some extra battery by disabling it.

Been browsing on mostly WiFi but some on 3G but not heavy browsing.

Much better than my iPhone 3G :D
[Nexus One General] BigDamHero:
Ok MUCH better battery life. Still not outstanding but I'm not expecting miracles here.

The main thing now is at least the phone doesn't seem to be discharging while its doing nothing whatsoever (as it was before). For anyone else with the same problem I recommend the following:

1)Follow the battery conditioning instructions discussed above;

2)Charge from the charger supplied with the phone. I really don't think USB is good enough as a main method of charging. If you are in the UK, Maplin do a US to UK converter for £5;

3)Disable 3G? This seems to make a big difference to me. Possibly because my signal where I work is pants. I just hope Google patch this soon.

Thanks to everyone for your help.
[Nexus One General] kep0ne:
Same here...although I did have some light phone usage today (not as heavy as last week), so it may not be entirely accurate. However, the battery doesn't seem to lose charge (visually...using battery widget to check the % every now and then) when it's just sitting there getting notifications. Like I said, light usage; few phone calls today, lots of email checking, etc.

Took it off the charger at around 9am...its 5pm now and I'm at 77%.

Much much better than last weeks performance.
[Nexus One General] catbear:
Do you have live wallpapers running? What's your screen brightness set to?

And just a general question, when we are not using the phone, is it better for the battery to have it connected to charger all the time?
[Nexus One General] SANTilt:
I've got a feeling the phone isn't letting go of certain things in memory; today I had to reboot the phone as it was hosing the battery again as soon as I took it off the charger. To the tune of 6% in fifteen minutes - that'd be around 24%/hour; a roughly four hour day.

Once I rebooted it, and started it out at 100% again these are the stats for today:

after 13 hours 8 minutes of being off the charger:

Biggest drains on battery:

-Display 58%

-Cell Standby 9%

-Voice calls 8%

-Phone idle 8%

-Android System 6%

-Android OS 4%

-News & Weather 4%

Similar use to yesterday, and the battery is still at 31%

Now I'm going to try an old fashion static wallpaper. See how much that affects it.
[Nexus One General] kep0ne:
Just static wallpapers. I did notice that live wallpapers drained the battery more, but thats to be expected. Screen brightness is set to a minimum, as I'm usually indoors most of the day. It's 1:14AM now...phone hasnt been on any sort of charger since 9AM (approx. 16 hours). Used it a bit more as the night went on...installed some apps, made a few more calls. It's at 6% now.

Here's the usage stats if anyone is interested

Display: 63%

Voice calls: 11%

Cell standby: 8%

Android System: 6%

Phone Idle: 3%

Wifi, market and dolphin browser are all at 2%.

I'd say that its going pretty well, but I've never expected any type of smartphone to last more than a day with constant use either.

Any opinions?
[Nexus One General] dnar56:
The more mAh the faster your phone charges but too much can damage your phone so your stock home charger will charge faster than the data cable connected to the computer.
[Nexus One General] catbear:
My battery is at 60% after 5 hours off the charger with virtually no use, static wallpaper and lowest brightness. I have locale/gtalk/newsweather running, that's all.

Biggest drains on battery:

-Display 53%

-Cell Standby 16%

-Phone idle 16%

-Android System 6%

-Android OS 4%

-Picture 2%

-Launcher 2%
[Nexus One General] SANTilt:
Did you reboot when you took the phone off the charger? So far, i've noticed that makes a marked difference.

Also, what are your update intervals for all your services?
[Nexus One General] na_rsx:
i been charging my phone every other day, which is pretty shocking since the mytouch i had only lasted about a day max.
[Nexus One General] stewart1988:
13hrs 27mins - 20%

Display 67%

nemoPlayer 7%

Cell standby 6%

Android System 5%

Mediaserver 5%

Phone idle 5%

Browser 5%

akmd 2%

I've watched a 1hour 45mins film in my break. Been browsing (Mainly reading about West Ham on both the News app and some websites) and posting on this forum. Downloaded the nemoPlayer and been playing some music, video with it. Its been 3G HSDPA all day from what I've seen

Received about 10 emails, Sent 3 texts and received 3, 1 phone call (1min).

Im happy with the battery :)
[Nexus One General] :
Charged over night

Hm....cell standby usage....73% after 6 hrs 31 mins being unplugged.

Display....17%

Unlpugged at 8 am, time now is 2:40 pm: Battery level at 70%.

Turned off 3g at about 12pm

Played music during my drives...one hour total I'd say of music player through default player.
[Nexus One General] SANTilt:
That's pretty damn acceptable to me.
[Nexus One General] GlenH:
I'm not sure if any patch from google would help.

1. 3G uses more power than 2G anyway, due to the different frequency bands

2. if you have a poor signal, that will use loads more power as the phone has to work harder to keep connected.

Thus if you have a better signal on 2G than 3G, you are bound to get much better battery life with 3G switched off.
[Nexus One General] mjwatmough:
I visited London at the weekend and was off and on the Underground quite a lot where there was no signal. I seemed to notice if I went into airplane mode when about to get on the tube it dropped my cell battery usage by quite a bit.
[Nexus One General] catbear:
Ok. After trying out various combinations, i finally found out what's draining my battery. It is due to gmail sync. After I turned off auto sync, I only lost about 5% battery in about 4-5 hours of standby as opposed to 40%. I also did two deep cycle recharge, and stopped the habit of killing apps.
[Nexus One General] BigDamHero:
I meant the "3G Problem". Speculation is that it consumes abnormal amounts of power while this is happening. I would have to agree.
[Nexus One General] wire103:
I have the following observations:

1) Charging via USB takes *forever* - 5 hours at least, which in my calculcations is 1½ too much (1400mah charged at 450mah should take no more than 3½ hours).

2) Charging via the power adapter is quite fast, and also gives me the feeling that the battery is more "juiced" than if charged via the USB adapter.

3) Disabling 3G has increased battery life on the phone *considerably*, bringing it up to the same level as my HTC Magic with 3G enabled under similar usage pattern.

I also suspect that there is a 3G problem of some sort. I live in Denmark and am on the provider named "3".
[Nexus One General] Lemim0uth:
Did someone try to use an iPhone charger to charge their phone ? It has the same output characteristics (5V - 1A), so it should work ?
[Nexus One General] SANTilt:
I've heard others blame the Gmail sync, but it's push, so it only tx/rx when there's something in your inbox, which all depends on how "popular" you are, no?

I always had syn on auto with my G1, and never had issues with it.

Anyway, I leave sync on, but GPS off, as that's only needed every so often. My mail, I'd like to know about.

The biggest differences I've noticed so far are live wallpapers, not killing apps, and rebooting after it's charged.

I'm sure an OTA will help with memory management et al...
[Nexus One General] stewart1988:
Yer I use mine at work :)

Today I got a little better battery but I didn't make/receive a call so that might be why! I watched Funny People (2hrs+) on my break (Shhh don't tell my boss!). I normally have to charge my iPhone by the afternoon! But this lasts me all day!
[Nexus One General] SANTilt:
16 hours, 20 minutes, and 17% battery left.

I'm starting to like this thing :) if only the dust would stop accumulating under the screen.

edit: 17 hours and at 4%, finally plugged the charger in. been listening to music and chatting on gtalk for a while now.
[Nexus One General] imfloflo:
@SANTilt Ok very good so what are your settings ? live wallpapers ? what's on/off ? how do you charge ? Did you reboot after charge? Did you make full charge?