[Samsung Galaxy Nexus] vyruz1986:
Ok I'm starting this thread in hopes to track down whatever is eating my GN's battery.

As an indication, this is the typical usage my phone will endure during one workin day:

12.00AM - 07.00AM : Phone is on the charger, turned on but idle

07.00AM : unplug the charger around 7.00AM

07.40AM - 08.40AM : driving to work during which time a constant BT connection to my cars handsfree kit is sustained.

08.40AM - 05.30PM : very little active usage, it does however fetch mail from my company's mail server (exchange) which can be quite a lot (+- 50 emails/day)

05.30PM - 06.30PM : driving home, BT connection for one hour again

06.30PM - 12.00AM : perhaps more usage compared to the day because I tend to check email and some websites in the couch on it (when my EEE Transformer is outta reach :-))

My configuration has all options constantly turned on (GPS,BT,WiFi,NFC)

There might be some gaming but not more than 30 minutes per day (some angry birds while on the crapper :-))

I have the phone for one week now, and seldomly the battery will last until I go to bed (12.00AM usually) where I can plug it in.

Now I'm not the kinda guy who expects days out of a decent Android phone, but it should at least get me through one working day.

So to find out if this is just how it's gonna be, or if there's something wrong with my phone and/or Android in general, I've done the following:

I've followed this thread a bit and learned the key to testing battery usage is to charge it fully and then let it sit without charger idle overnight and see how much current usage (mA) can be seen.

I've used the 'Battery Monitor Widget' app to track my usage during the night.

This is what I've come up with so far:

1st night : Everything (BT,WiFi,GPS,NFC) turned on:

2011/12/12|01:11:01|-70mA|62%|3866mV|28.0ºC|0|0
2011/12/12|01:16:01|-52mA|62%|3866mV|28.0ºC|0|0
2011/12/12|01:21:01|-41mA|62%|3866mV|28.0ºC|0|0
2011/12/12|01:26:01|-34mA|62%|3866mV|28.0ºC|0|0
2011/12/12|01:31:01|-29mA|62%|3866mV|28.0ºC|0|0
2011/12/12|01:36:01|-25mA|62%|3866mV|28.0ºC|0|0
2011/12/12|01:41:01|-23mA|61%|3866mV|22.0ºC|0|0
2011/12/12|01:46:01|-23mA|61%|3866mV|22.0ºC|0|0
2011/12/12|01:51:01|-23mA|61%|3866mV|22.0ºC|0|0
2011/12/12|01:56:01|-23mA|61%|3866mV|22.0ºC|0|0
2011/12/12|02:01:01|-23mA|61%|3866mV|22.0ºC|0|0
2011/12/12|02:06:01|-29mA|60%|3846mV|21.0ºC|0|0
2011/12/12|02:11:01|-38mA|60%|3846mV|21.0ºC|0|0
2011/12/12|02:16:01|-38mA|60%|3846mV|21.0ºC|0|0
2011/12/12|02:21:01|-38mA|60%|3846mV|21.0ºC|0|0
2011/12/12|02:26:01|-38mA|60%|3846mV|21.0ºC|0|0
2011/12/12|02:31:01|-38mA|59%|3836mV|21.0ºC|0|0
2011/12/12|02:36:01|-40mA|59%|3836mV|21.0ºC|0|0
2011/12/12|02:41:01|-40mA|59%|3836mV|21.0ºC|0|0
2011/12/12|02:46:01|-40mA|59%|3836mV|21.0ºC|0|0
2011/12/12|02:51:01|-40mA|59%|3836mV|21.0ºC|0|0
2011/12/12|02:56:01|-41mA|58%|3838mV|21.0ºC|0|0
2011/12/12|03:01:01|-43mA|58%|3838mV|21.0ºC|0|0
2011/12/12|03:06:01|-43mA|58%|3838mV|21.0ºC|0|0
2011/12/12|03:11:01|-43mA|58%|3838mV|21.0ºC|0|0
2011/12/12|03:16:01|-55mA|57%|3846mV|21.0ºC|0|0
2011/12/12|03:21:01|-58mA|57%|3846mV|21.0ºC|0|0
2011/12/12|03:26:01|-58mA|57%|3846mV|21.0ºC|0|0
2011/12/12|03:31:01|-58mA|57%|3846mV|21.0ºC|0|0
2011/12/12|03:36:01|-52mA|56%|3826mV|21.0ºC|0|0
2011/12/12|03:41:01|-52mA|56%|3826mV|21.0ºC|0|0
2011/12/12|03:46:01|-52mA|56%|3826mV|21.0ºC|0|0
2011/12/12|03:51:01|-52mA|56%|3826mV|21.0ºC|0|0
2011/12/12|03:56:01|-55mA|55%|3806mV|21.0ºC|0|0
2011/12/12|04:01:01|-55mA|55%|3806mV|21.0ºC|0|0
2011/12/12|04:06:01|-55mA|55%|3806mV|21.0ºC|0|0
2011/12/12|04:11:01|-70mA|54%|3825mV|21.0ºC|0|0
2011/12/12|04:16:01|-70mA|54%|3825mV|21.0ºC|0|0
2011/12/12|04:21:01|-70mA|54%|3825mV|21.0ºC|0|0
2011/12/12|04:26:01|-61mA|54%|3825mV|21.0ºC|0|0
2011/12/12|04:31:01|-52mA|53%|3818mV|21.0ºC|0|0
2011/12/12|04:36:01|-52mA|53%|3818mV|21.0ºC|0|0
2011/12/12|04:41:01|-52mA|53%|3818mV|21.0ºC|0|0
2011/12/12|04:46:01|-57mA|52%|3791mV|21.0ºC|0|0
2011/12/12|04:51:01|-61mA|52%|3791mV|21.0ºC|0|0
2011/12/12|04:56:01|-61mA|52%|3791mV|21.0ºC|0|0
2011/12/12|05:01:01|-61mA|52%|3791mV|21.0ºC|0|0
2011/12/12|05:06:01|-52mA|52%|3791mV|21.0ºC|0|0
2011/12/12|05:11:01|-42mA|51%|3793mV|21.0ºC|0|0
2011/12/12|05:16:01|-42mA|51%|3793mV|21.0ºC|0|0
2011/12/12|05:21:01|-42mA|51%|3793mV|21.0ºC|0|0
2011/12/12|05:26:01|-42mA|51%|3793mV|21.0ºC|0|0
2011/12/12|05:31:01|-42mA|51%|3793mV|21.0ºC|0|0
2011/12/12|05:36:01|-40mA|51%|3793mV|21.0ºC|0|0
2011/12/12|05:41:01|-36mA|50%|3811mV|21.0ºC|0|0
2011/12/12|05:46:01|-36mA|50%|3811mV|21.0ºC|0|0
2011/12/12|05:51:01|-36mA|50%|3811mV|21.0ºC|0|0
2011/12/12|05:56:01|-36mA|50%|3811mV|21.0ºC|0|0
2011/12/12|06:01:01|-36mA|50%|3811mV|21.0ºC|0|0
2011/12/12|06:06:01|-36mA|50%|3811mV|21.0ºC|0|0
2011/12/12|06:11:01|-36mA|49%|3806mV|21.0ºC|0|0
2011/12/12|06:16:01|-36mA|49%|3806mV|21.0ºC|0|0
2011/12/12|06:21:01|-36mA|49%|3806mV|21.0ºC|0|0
2011/12/12|06:26:01|-36mA|49%|3806mV|21.0ºC|0|0
2011/12/12|06:31:01|-36mA|49%|3806mV|21.0ºC|2|0

Resulting in 2882mA loss during 320 minutes, an average of 9.00625 mA per minute

The next night I turned everything off (BT,GPS,WiFi) and left only 3G enabled:

2011/12/13|00:35:19|-5mA|99%|4091mV|29.0ºC|2|2
2011/12/13|00:40:19|-21mA|99%|4091mV|29.0ºC|2|0
2011/12/13|00:45:19|-21mA|99%|4091mV|29.0ºC|0|0
2011/12/13|00:50:19|-30mA|98%|4138mV|23.0ºC|0|0
2011/12/13|00:55:19|-69mA|98%|4138mV|23.0ºC|0|0
2011/12/13|01:00:19|-69mA|98%|4138mV|23.0ºC|2|0
2011/12/13|01:05:19|-69mA|98%|4138mV|23.0ºC|0|0
2011/12/13|01:10:19|-58mA|98%|4138mV|23.0ºC|0|0
2011/12/13|01:15:19|-45mA|97%|4136mV|23.0ºC|0|0
2011/12/13|01:20:19|-42mA|97%|4136mV|23.0ºC|0|0
2011/12/13|01:25:19|-42mA|97%|4136mV|23.0ºC|0|0
2011/12/13|01:30:19|-42mA|97%|4136mV|23.0ºC|0|0
2011/12/13|01:35:19|-42mA|97%|4136mV|23.0ºC|0|0
2011/12/13|01:40:19|-41mA|97%|4136mV|23.0ºC|0|0
2011/12/13|01:45:19|-37mA|96%|4123mV|24.0ºC|0|0
2011/12/13|01:50:19|-36mA|96%|4123mV|24.0ºC|0|0
2011/12/13|01:55:19|-36mA|96%|4123mV|24.0ºC|0|0
2011/12/13|02:00:19|-36mA|96%|4123mV|24.0ºC|0|0
2011/12/13|02:05:19|-36mA|96%|4123mV|24.0ºC|0|0
2011/12/13|02:10:19|-36mA|96%|4123mV|24.0ºC|0|0
2011/12/13|02:15:19|-35mA|95%|4115mV|24.0ºC|0|0
2011/12/13|02:20:19|-35mA|95%|4115mV|24.0ºC|0|0
2011/12/13|02:25:19|-35mA|95%|4115mV|24.0ºC|0|0
2011/12/13|02:30:19|-35mA|95%|4115mV|24.0ºC|0|0
2011/12/13|02:35:19|-35mA|95%|4115mV|24.0ºC|0|0
2011/12/13|02:40:19|-35mA|95%|4115mV|24.0ºC|0|0
2011/12/13|02:45:19|-34mA|94%|4083mV|24.0ºC|0|0
2011/12/13|02:50:19|-33mA|94%|4083mV|24.0ºC|0|0
2011/12/13|02:55:19|-33mA|94%|4083mV|24.0ºC|0|0
2011/12/13|03:00:19|-33mA|94%|4083mV|24.0ºC|0|0
2011/12/13|03:05:19|-33mA|94%|4083mV|24.0ºC|0|0
2011/12/13|03:10:19|-33mA|94%|4083mV|24.0ºC|0|0
2011/12/13|03:15:19|-33mA|94%|4083mV|24.0ºC|0|0
2011/12/13|03:20:19|-31mA|93%|4096mV|24.0ºC|0|0
2011/12/13|03:25:19|-31mA|93%|4096mV|24.0ºC|0|0
2011/12/13|03:30:19|-31mA|93%|4096mV|24.0ºC|0|0
2011/12/13|03:35:19|-31mA|93%|4096mV|24.0ºC|0|0
2011/12/13|03:40:19|-31mA|93%|4096mV|24.0ºC|0|0
2011/12/13|03:45:19|-31mA|93%|4096mV|24.0ºC|0|0
2011/12/13|03:50:19|-31mA|93%|4096mV|24.0ºC|0|0
2011/12/13|03:55:19|-29mA|92%|4088mV|23.0ºC|0|0
2011/12/13|04:00:19|-28mA|92%|4088mV|23.0ºC|0|0
2011/12/13|04:05:19|-28mA|92%|4088mV|23.0ºC|0|0
2011/12/13|04:10:19|-28mA|92%|4088mV|23.0ºC|0|0
2011/12/13|04:15:19|-28mA|92%|4088mV|23.0ºC|0|0
2011/12/13|04:20:19|-38mA|91%|4075mV|23.0ºC|0|0
2011/12/13|04:25:19|-45mA|91%|4075mV|23.0ºC|0|0
2011/12/13|04:30:19|-45mA|91%|4075mV|23.0ºC|0|0
2011/12/13|04:35:19|-45mA|91%|4075mV|23.0ºC|0|0
2011/12/13|04:40:19|-45mA|91%|4075mV|23.0ºC|0|0
2011/12/13|04:45:19|-41mA|91%|4075mV|23.0ºC|0|0
2011/12/13|04:50:19|-34mA|91%|4075mV|23.0ºC|0|0
2011/12/13|04:55:19|-29mA|91%|4075mV|23.0ºC|0|0
2011/12/13|05:00:19|-27mA|90%|4061mV|22.0ºC|0|0
2011/12/13|05:05:19|-27mA|90%|4061mV|22.0ºC|0|0
2011/12/13|05:10:19|-27mA|90%|4061mV|22.0ºC|0|0
2011/12/13|05:15:19|-27mA|90%|4061mV|22.0ºC|0|0
2011/12/13|05:20:19|-27mA|90%|4061mV|22.0ºC|0|0
2011/12/13|05:25:19|-27mA|90%|4061mV|22.0ºC|0|0
2011/12/13|05:30:19|-31mA|89%|4026mV|22.0ºC|0|0
2011/12/13|05:35:19|-33mA|89%|4026mV|22.0ºC|0|0
2011/12/13|05:40:19|-33mA|89%|4026mV|22.0ºC|0|0
2011/12/13|05:45:19|-33mA|89%|4026mV|22.0ºC|0|0
2011/12/13|05:50:19|-33mA|89%|4026mV|22.0ºC|0|0
2011/12/13|05:55:19|-33mA|89%|4026mV|22.0ºC|0|0
2011/12/13|06:00:19|-32mA|89%|4026mV|22.0ºC|0|0
2011/12/13|06:05:19|-28mA|89%|4026mV|22.0ºC|0|0
2011/12/13|06:10:19|-25mA|89%|4026mV|22.0ºC|0|0
2011/12/13|06:15:19|-23mA|88%|4048mV|22.0ºC|0|0
2011/12/13|06:20:19|-23mA|88%|4048mV|22.0ºC|0|0
2011/12/13|06:25:19|-23mA|88%|4048mV|22.0ºC|0|0
2011/12/13|06:30:19|-23mA|88%|4048mV|22.0ºC|2|0

Resulting in 2470mA loss over 355 minutes, an everage of 6.9577 per minute

Then, the next night I turned everything back on, but uninstalled the Facebook app since I read some rumors that it might be causing battery drain:

2011/12/14|01:00:33|1mA|99%|4156mV|30.0ºC|1|1
2011/12/14|01:05:33|-1mA|99%|4148mV|34.0ºC|2|2
2011/12/14|01:10:33|-2mA|99%|4148mV|34.0ºC|2|0
2011/12/14|01:15:33|-122mA|97%|4088mV|35.0ºC|1|0
2011/12/14|01:20:33|-304mA|97%|4088mV|35.0ºC|2|0
2011/12/14|01:25:33|-143mA|96%|4116mV|32.0ºC|0|0
2011/12/14|01:30:33|-131mA|96%|4116mV|32.0ºC|2|0
2011/12/14|01:35:33|-218mA|94%|3995mV|37.0ºC|1|0
2011/12/14|01:40:33|-734mA|91%|4006mV|39.0ºC|2|0
2011/12/14|01:45:33|-311mA|90%|4045mV|32.0ºC|0|0
2011/12/14|01:50:33|-202mA|90%|4045mV|32.0ºC|0|0
2011/12/14|01:55:33|-150mA|89%|4041mV|30.0ºC|0|0
2011/12/14|02:00:33|-142mA|88%|4028mV|29.0ºC|0|0
2011/12/14|02:05:33|-131mA|88%|4028mV|29.0ºC|0|0
2011/12/14|02:10:33|-122mA|87%|4002mV|27.0ºC|0|0
2011/12/14|02:15:33|-116mA|87%|4002mV|27.0ºC|0|0
2011/12/14|02:20:33|-108mA|86%|4016mV|26.0ºC|0|0
2011/12/14|02:25:33|-104mA|86%|4016mV|26.0ºC|0|0
2011/12/14|02:30:33|-131mA|85%|4006mV|26.0ºC|0|0
2011/12/14|02:35:33|-131mA|84%|3995mV|26.0ºC|0|0
2011/12/14|02:40:33|-131mA|84%|3995mV|26.0ºC|0|0
2011/12/14|02:45:33|-117mA|83%|3987mV|26.0ºC|0|0
2011/12/14|02:50:33|-104mA|83%|3987mV|26.0ºC|0|0
2011/12/14|02:55:33|-125mA|82%|3978mV|26.0ºC|0|0
2011/12/14|03:00:33|-131mA|81%|3976mV|26.0ºC|0|0
2011/12/14|03:05:33|-131mA|81%|3976mV|26.0ºC|0|0
2011/12/14|03:10:33|-125mA|80%|3968mV|26.0ºC|0|0
2011/12/14|03:15:33|-116mA|80%|3968mV|26.0ºC|0|0
2011/12/14|03:20:33|-111mA|79%|3961mV|25.0ºC|0|0
2011/12/14|03:25:33|-119mA|78%|3955mV|26.0ºC|0|0
2011/12/14|03:30:33|-175mA|78%|3955mV|26.0ºC|0|0
2011/12/14|03:35:33|-137mA|77%|3948mV|25.0ºC|0|0
2011/12/14|03:40:33|-116mA|77%|3948mV|25.0ºC|0|0
2011/12/14|03:45:33|-116mA|76%|3940mV|25.0ºC|0|0
2011/12/14|03:50:33|-122mA|75%|3931mV|26.0ºC|0|0
2011/12/14|03:55:33|-150mA|75%|3931mV|26.0ºC|0|0
2011/12/14|04:00:33|-138mA|74%|3926mV|26.0ºC|0|0
2011/12/14|04:05:33|-134mA|73%|3921mV|26.0ºC|0|0
2011/12/14|04:10:33|-149mA|73%|3921mV|26.0ºC|0|0
2011/12/14|04:15:33|-149mA|72%|3918mV|26.0ºC|0|0
2011/12/14|04:20:33|-149mA|71%|3892mV|26.0ºC|0|0
2011/12/14|04:25:33|-173mA|70%|3905mV|26.0ºC|0|0
2011/12/14|04:30:33|-202mA|70%|3905mV|26.0ºC|0|0
2011/12/14|04:35:33|-119mA|69%|3902mV|25.0ºC|0|0
2011/12/14|04:40:33|-95mA|69%|3902mV|25.0ºC|0|0
2011/12/14|04:45:33|-95mA|69%|3902mV|25.0ºC|0|0
2011/12/14|04:50:33|-95mA|68%|3863mV|25.0ºC|0|0
2011/12/14|04:55:33|-209mA|67%|3887mV|26.0ºC|0|0
2011/12/14|05:00:33|-156mA|67%|3887mV|26.0ºC|0|0
2011/12/14|05:05:33|-105mA|66%|3880mV|25.0ºC|0|0
2011/12/14|05:10:33|-132mA|65%|3878mV|25.0ºC|0|0
2011/12/14|05:15:33|-150mA|65%|3878mV|25.0ºC|0|0
2011/12/14|05:20:33|-108mA|64%|3841mV|25.0ºC|0|0
2011/12/14|05:25:33|-111mA|63%|3841mV|25.0ºC|0|0
2011/12/14|05:30:33|-175mA|63%|3841mV|25.0ºC|0|0
2011/12/14|05:35:33|-175mA|62%|3856mV|25.0ºC|0|0
2011/12/14|05:40:33|-149mA|62%|3856mV|25.0ºC|0|0
2011/12/14|05:45:33|-97mA|61%|3853mV|25.0ºC|0|0
2011/12/14|05:50:33|-95mA|61%|3853mV|25.0ºC|0|0
2011/12/14|05:55:33|-102mA|60%|3852mV|25.0ºC|0|0
2011/12/14|06:00:33|-104mA|60%|3852mV|25.0ºC|0|0
2011/12/14|06:05:33|-116mA|59%|3841mV|25.0ºC|0|0
2011/12/14|06:10:33|-136mA|58%|3830mV|25.0ºC|0|0
2011/12/14|06:15:33|-159mA|57%|3830mV|24.0ºC|0|0
2011/12/14|06:20:33|-174mA|57%|3830mV|24.0ºC|0|0
2011/12/14|06:25:33|-125mA|56%|3823mV|25.0ºC|0|0
2011/12/14|06:30:33|-116mA|56%|3823mV|25.0ºC|2|0

So what the heck happened here???

9521mA loss over 325 minutes, an average of 29.29538 mA per minute

My battery was nearly half depleted while having been idle for 5.5 hours!

I think for now I'll ignore this last run-down of the battery, but this at least proves that sometimes strange stuff happens beneath the hood which we (or at least I) cannot (yet) explain.

If I look in my battery usage screen it just says:

Screen : 37%

Android OS : 29%

All others below 10%

I'll keep updating this thread over the coming days and hopefully find the culprit...