yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Nexus] s.m.knipe:
My cousin is doing her graduate work at Texas on this battery technology situation. They have made huge leaps and bounds over what we all get to play with outside of the lab, but it is so expensive that it will never see a market. I mean cool (read: expensive) stuff like super-cooled nano-tubes (super-cooled ceramics have almost no electrical resistance), microbial-perpetuated energy (small amount of energy in, small amount of energy trickled out over an appreciable amount of time), and increasing the capacity for inductive charging. I always feel like she is holding out on what technology is around the corner, but she has shown me some of their technical papers and there is no super secret mind-boggling technology around the corner, just "promise." Last I talked with her she was doing something with wavelengths and duration of energy over time (inductive charging). It's interesting but unless we want a couple million dollar devices, it isn't feasible (yet).

Talking to her, this is much more likely. In fact she says they have rapid charge technology (like < half an hour for a Prius battery), but it is both very expensive and unable to be mass produced. Although I feel like someone has advertised this at one of the auto trade shows or something, fairly recently. She mentioned this in terms of an inductive rapid charger that will charge your car when you pull into your garage or in powered parking garages, but she said it was at least ten years out. This is coming though...
[Samsung Galaxy Nexus] onthecouchagain:
Very insightful. Thanks for sharing.

Does anyone know how much it is to produce a battery that has 2000+ mAh versus a battery that has 1700-1800 mAh?
[Samsung Galaxy Nexus] Lcrkz0023:
Seriously tho, isnt battery life on all smartphones subpar, just saying.

Ive had bout every top smartphone dating back the SE-P800 and battery life comes up...every phone on xda has "battery life not good enough thread." Just plan on charging it everyday or take another battery with you and problem solved.
[Samsung Galaxy Nexus] TheAlp:
wow.. my Desire HD lasts around 10 hours which I consider pretty bad and its only got a 1230 mAh battery, but then again we barely just got 4G in some cities here and I don't plan on using it so I guess that I can get at least a couple of hours with the more battery friendly screen.

at least I hope so.
[Samsung Galaxy Nexus] onthecouchagain:
You're right to say most smartphones offer a day--more or less--of battery life, but some are better at it than others (e.g., look to the iPhone 4, not 4S), and it doesn't mean battery technology doesn't need to improve.

With how large screens are becoming, and with LTE/HSPA+ and just generally more data-usage, battery life needs to keep up as well.

Of course, there are alternative solutions in the mean time, but usually they are inconvenient. Charging it every night is a given to combat quick drainers, but sometimes when you're out for the whole day and night, it's worrisome to see your phone reach that danger area (15% or so), while knowing you still need it to make calls, use the GPS, etc. Also, carrying an extra battery can be a burdensome annoyance for some.

Also, despite all the features that are offered (ie. widgets, live wallpapers, live location tracking, 4G speeds, etc.), something feels amiss when you have to avoid using these, often touted, features in order to sustain battery longevity.

I understand what you're saying too. It is what it is. But it'd be great to see battery technology improve (and be affordable).
[Samsung Galaxy Nexus] Chirality:
Processing power is increasing exponentially, energy density of matter is not. That's just a fact of life and there's nothing we can do about it.
[Samsung Galaxy Nexus] hotleadsingerguy:
Maybe you should read the article.

*AND I QUOTE*

"By heavy usage, we’re talking about contsant 4G LTE data use, playing games, listening to music and so on" (copied and pasted from the article)

That pretty clearly explains what they mean by heavy usage. Sure, we're not getting exact figures of time spent doing each individual thing, but constant use of those things would kill *MY* phone in under 10 hours (Galaxy S II), so if the Galaxy Nexus can last just as long on LTE doing the same things? I'm down.
[Samsung Galaxy Nexus] justabrake:
I never cared about battery life because I always carry extra power with me I've done it since the iphone 3G always, battery pack and an extension cable works for me, I won't change the battery on this because it would require removing case and disrupting the screen saver that I plan on putting on

case will be an AGF ballistics if it's compatible

i'm going with this >SAST Portable Rechargeable 4800mAh Emergency Power Battery w/ White Light LED/Adapters

shipped out 11/9

I'm covered :D
[Samsung Galaxy Nexus] Balthazar B:
About 10% more. And it'll be about 10% larger.
[Samsung Galaxy Nexus] johnchad14:
I'm not concerned with the battery life persay, as I think it will be pretty good comparatively. I am concerned with the battery life on LTE, as every LTE phone out there is simultaneously great speed and frustratingly battery killing with LTE on. Even on standby mode with lte enabled on my thunderbolt...drain, drain, drain. I can't wait for that to be improved, and I haven't heard anything indicating it will be any different for the GN on lte.
[Samsung Galaxy Nexus] ock:
I did read the article, which is why I said continuous/constant usage for music playing vs playing games would have very different battery drainage.

Of course, if the claims are true, it would indeed be a marvelous improvement.
[Samsung Galaxy Nexus] Balthazar B:
The second-gen integrated LTE radios should be a lot better in terms of lower juice consumption. Even more so when there doesn't need to be a second CDMA radio in the mix.

But the second-gen hardware won't appear in devices for about another year.
[Samsung Galaxy Nexus] case0:
Bit of an oxymoronic statement :P
[Samsung Galaxy Nexus] ElecEngineer1422:
I am hoping the pictures of the i515 battery posted in Samsung's accessory store are correct. *The words say that it is a 1750mah,*but If the picture of the i515 battery is correct on Samsung's site. That is NOT a 1750mah. It is a 2100mah battery. The picture shows 7.77Wh at 3.7v which calculates out to be 2099.999999... Or a 2100mah. The battery of the gsm model shown in Hong Kong is 6.48Wh at 3.7v calculates to 1750mah. Maybe it is the extended battery on Samsung's site. It is definitely for a galaxy phone cause it has the NFC wording on the back, and it is not for the Galaxy Note cause it comes with a 2500mah battery. Maybe this is how the galaxy nexus is doing so well on battery life in the latest battery reports. Hope the Verizon i515 comes standard with a 2100mah.
[Samsung Galaxy Nexus] hooman64:
Question

Do you guys think since in AMOLED displays the black color is essentially the pixels being turned off, having a black wallpaper uses less battery? because each time I check my battery usage I see that my display is always on top, and I have this theory can anyone confirm it or correct me if I'm wrong?
[Samsung Galaxy Nexus] martonikaj:
Well noted that black wallpapers do help. Not a noticeable amount though.
[Samsung Galaxy Nexus] ArmanUV:
I am running Black Exodus theme and it definitely helps. I was getting around 3.5h of screen time but now I get around 4h.
[Samsung Galaxy Nexus] Jayrod1980:
I know you lte guys are having some battery woes but I think that's all the radio they shoe horned in there. If the antenna had better signal and the extended Verizon was standard it wouldn't be a problem. I have the OEM extended 2000mah in my GSM version and on T-Mobile I'm getting 8-11mbps down and 1.8-3 up and almost 6 hours of screen on time. This is with everything on and synced and running 350-1350 mhz on conservative governor. This phone has the best battery life I've ever seen. Granted the battery is 500mah more than any previous phone but only my small screen mytouch4g got more than 5 hours on screen. My nexus s averaged 4. Love this thing!!!
[Samsung Galaxy Nexus] versd:
black background will help, but not by that much. search 'power consumption' on these forums and you will find a detailed post about the power the screen draws when displaying all white, 50% grey, 100% black, there is a power draw difference, but some would argue not enough to keep a black background.

a black background can be nice though because of the deep blacks, you can not tell easily in many lighting conditions where the screen ends and the bezel begins.
[Samsung Galaxy Nexus] hooman64:
thank you all for sharing your opinion with me, well I'll check that thread you said out and see how helpful it might be.
[Samsung Galaxy Nexus] lilirose:
I haven't gone browsing outside forums of devices that I own, but I would bet nearly every smartphone being discussed on XDA has at least one "OMG the battery on this phone sucks!" thread.

I've needed to carry a spare battery for my smartphone ever since my first BlackBerry in 2006. I don't need it most days, but I consider it to be a required accessory. I'm pretty sure that every one of the phones I've had since then has had an extended battery available but I never wanted the added thickness.

IMO the battery on the Gnex is not noticeably worse than any other smartphone. For comparison's sake, I have a SGS that mostly sits on my desk untouched all day long, with Wifi off, while I use my Gnex heavily on Wifi. When I go to bed at night the SGS will be at 15% or so and the Gnex will usually be above 30%.

In my experience the Gnex actually has excellent battery life when you take the entire picture into account- the huge screen, the slimness of the phone, the power of the processor, etc.
[Samsung Galaxy Nexus] ATnTdude:
I'd actually say more than 10% larger. The bigger the cell, the bigger the boom if containment is ever breached. The Nexus extended battery is about a third thicker than the regular cell. Laptops usually don't have single cells as big as 2Ah. Laptops usually have 6-9 cell batteries with 8-12Ah.
[Samsung Galaxy Nexus] @rbiter:
The gnex gets awesome battery life considering the horsepower and especially the big screen. Pit it against current smartphones with similar or lesser specs and the GNex still outperforms.

Sent from my Nexus in Texas.
[Samsung Galaxy Nexus] stretched:
You could go 3600 mAh http://www.ebay.com/itm/Extended-36...220930?pt=PDA_Accessories&hash=item484381bb82

---------- Post added at 06:39 PM ---------- Previous post was at 06:36 PM ----------

I got used to carrying a spare battery when I had my evo. Right now I just use 3 1900 mAh batteries I got off ebay with a charger for $13 I think its the biggest you can get without needing a chubby back.
[Samsung Galaxy Nexus] skynet11:
I discovered the source of my battery drain: it turns out that playing games, watching Netflix, browsing the Internet and the forums, and listening to Google Music all use at least some battery ;) I better start a new thread here to share my monumental breakthrough...

Terminators run on Android :cool:
[Samsung Galaxy Nexus] Valynor:
If you think mundane stuff like this drains your battery, try shorting it. :]
[Samsung Galaxy Nexus] Lox_Dev:
My battery life is awesome: average between 25 to 30 hours at normal usage: https://plus.google.com/u/0/111217047044368348253/posts/eZkfvnk9G8j

I haven't done any hack or installed any app to supposedly improve battery life.

I had many android devices and none had a so good battery life, by far!
[Samsung Galaxy Nexus] ckang008:
I am using both Galaxy S2 SkyRocket and GSM galaxy nexus. (personal and work phone) The skyrocket is much bigger drain to battery vs the galaxy nexus. But most likely it's because i use skyrocket much more intensively and I use the nexus as a talk phone.

I got an extended battery from QCell on Amazon and at least resolves my battery issues for skyrocket. Looking at Amazon, it seems QCell also offers extended battery for Galaxy Nexus. I'm going to give that a try and let you guys know on the result
[Samsung Galaxy Nexus] EP2008:
You had less than 2 hours screen time. That's terrible. The standby time for this phone is 6 DAYS and getting 30 hours with hardly any use is nothing to be happy about. :(
[Samsung Galaxy Nexus] XfrostX:
Getting decent battery life, used 4g for about 45 minutes.

http://imgur.com/WPujk.png

http://imgur.com/U3h1u.png
[Samsung Galaxy Nexus] costlyman:
This is a screenshot of my phone's battery performance.
[Samsung Galaxy Nexus] TiltedAz:
I read something about air lithium batteries in the lab having energy densities similar to gasoline (about 3x current li-ion batteries). They're still working out issues with moisture and air degrading the cathode.

It would add extra size and mass but maybe some would opt for a case, holster, or clip containing a small external battery with a portable recharge connection.
[Samsung Galaxy Nexus] aquavalanche:
i still don't understand what makes this phone drains battery so fast.. using it only for chat makes my battery down to 20% in 6 hours.. from 8AM to 2PM..
[Samsung Galaxy Nexus] danton47:
It's the screen most likely...
[Samsung Galaxy Nexus] bendirkss:
I see so many posts like this. That's amazing battery life! I'm.done after 8h
[Samsung Galaxy Nexus] 3ddyz:
Why are your first pics in English and last one in French?
[Galaxy Tab 8.9 Accessories] owlmatt:
I haven't gotten mine yet, but I used this case for my 10.1 and I loved it. Now it's even cheaper for the 8.9. Happy to write a mini review when I get the case but for this price I had to share. 10 dollars shipped. Hopefully this price stays that way for all of you.

http://www.amazon.com/gp/product/B005X5YLRU/ref=oh_o00_s00_i00_details
[Galaxy Tab 8.9 Accessories] ddeath:
Wow!! That's cheap!!! I've placed an order!!!!
[Galaxy Tab 8.9 Accessories] gumataotao:
I hope its good so I can return my expensive belkin one. Thanks for the link.
[Galaxy Tab 8.9 Accessories] lxnyce:
It is very good! It looks very professional and the has a nice slim profile.
[Galaxy Tab 8.9 Accessories] Jnn1:
I got one for my new 8.9 as well, and though it shows its cheapness in the quality of the faux leather, the roughess of the cut and stiches, the thickness of the clip, etc, it is very functional and so for that price (10 dollars total) it is hard to complain and most likely I ll keep it too.
[Galaxy Tab 8.9 Accessories] SGSChris:
not recommended!

I got the deal thanks to the operator of this thread. great price and fast delivery - no complaints there.

However, the case has a serious design flaw - including bad design decision by Samsung as well. The onla way the case works for angled view, the bottom speakers of the tab sit in the shallow groves which are a soft material and i) they do not keep the angle stable and ii) forget about watching a movie or listening to music!

I turned the tab 180 degrees so the speakers face upwards but now the power button sits in the groves and tend to blank my screen from time to time.

Só if you do any form of multimedia then this case is not recommended.

sorry for the bad news but since the case got only 5star reviews in Amazon I felt a need to share a different opinion.

cheers chris
[Galaxy Tab 8.9 Accessories] mynewuser:
If compare this

http://www.amazon.com/gp/product/B00...00_i00_details

vs

http://www.ebay.com/itm/NEW-PU-Leat...Accessories&hash=item3f10227d9e#ht_3256wt_940

Which one thinner?

The amazon holding I also worry as it may come out easily.
[Galaxy Tab 8.9 Accessories] nkrick:
I bought this case since it seems to be one of the better options currently, especially at the price. I am actually very happy with it. Someday I may replace it with a keyboard folio case, but for now it does it job and looks decent. Most of the other cases cover part of the front of the tablet and IMHO that looks tacky.

---------- Post added at 04:35 PM ---------- Previous post was at 04:31 PM ----------

The Vipertek is definitely thinner. Don't worry about how well the Vipertek case holds the tablet. The connection is very firm, there is no way it will fall out accidentally.
[Galaxy Tab 8.9 Accessories] mynewuser:
for me I prefer to use my tab in portrait mode. is the 360 rotate case better or thi�s amazon case?
[Galaxy Tab 8.9 Accessories] orlandoxpolice:
got this today!
[Galaxy Tab 8.9 Accessories] tommydroidx:
noreve case

This is a very nice case as well. No complaints except a little pricey, but it is on sale for the holidays! http://www.mobilefun.co.uk/noreve-tradition-leather-case-for-samsung-galaxy-tab-8-9-p32196.htm
[Galaxy Tab 8.9 Accessories] SmittyRN:
$73, before shipping? Sorry, I'll stick to my Vipertek; pretty much the same case, it's made well, and less than $20 with Amazon prime. It's even got an additional slot inside the top cover for an extra viewing angle.
[Galaxy Tab 8.9 Accessories] orlandoxpolice:
I got mine on Saturday and I love it!

Thanks OP for posting
[Galaxy Tab 8.9 Accessories] twingrls:
Thanks to the OP I am quite pleased with the Vipertek case. Beats the over priced bulky Belkin case I got with the tab hands down.
[Galaxy Tab 8.9 Accessories] orlandoxpolice:
Had mine for a while now. It leaves marks on the screen when closed for a while and the screen is dark, but you cant notice them when powered on.
[Galaxy Tab 8.9 Accessories] Myster_X:
Just got my Galaxy Tab 8.9 Vipertek case from the online jungle store. <grin>

I feel much better about my wife throwing the tablet in her purse and not scratching it all up. The only complaint I have, and I knew this when I bought it due to reviews at said online jungle store, is that the speakers are not very loud when using the adjustable viewing angles (they get buried in the soft padded base). But that is more of a design issue with the tablet than the case imo. The case is a tremendous value.

-me
[Galaxy Tab 8.9 Accessories] orlandoxpolice:
If you balance it right you can make it louder
[Galaxy Tab 8.9 Accessories] estelgrace:
Right. This case is now $25 on Amazon. TT_TT

But seeing all the good reviews here as well as there convinced me to go for it.

(I was about to get the Acase though, but I liked the Vipertek look and grooves better) It looks like this is the case to get :D
[Galaxy Tab 8.9 Accessories] pseudoheld:
now if only they had shipping to europe...cases like this cost 35€ and upwards over here. even with shipping this case would probably be cheaper than most of them over here :(

any ideas on how to get this to germany?
[Galaxy Tab 8.9 Accessories] maxtcee:
amazon all out anybody have a link of where to buy the vipertek case
[Captivate Android Development] Przekret:
I897UCKK2:

Android 2.3.5

# autogenerated by buildinfo.sh
ro.build.id=GINGERBREAD
ro.build.display.id=GINGERBREAD.UCKK2
ro.build.version.incremental=UCKK2
ro.build.version.sdk=10
ro.build.version.codename=REL
ro.build.version.release=2.3.5
ro.build.date=Thu Nov 10 16:24:13 KST 2011
ro.build.date.utc=1320909853
ro.build.type=user
ro.build.user=se.infra
ro.build.host=SEI-46
ro.build.tags=release-keys
ro.product.model=SAMSUNG-SGH-I897
ro.product.brand=samsung
ro.product.name=SGH-I897
ro.product.device=SGH-I897
ro.product.board=SGH-I897
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=SAMSUNG
ro.product.locale.language=en
ro.product.locale.region=US
ro.wifi.channels=
ro.board.platform=s5pc110
# ro.build.product is obsolete; use ro.product.device
ro.build.product=SGH-I897
# Do not try to parse ro.build.description or .fingerprint
ro.build.description=SGH-I897-user 2.3.5 GINGERBREAD UCKK2 release-keys
ro.build.fingerprint=samsung/SGH-I897/SGH-I897:2.3.5/GINGERBREAD/UCKK2:user/release-keys
# Samsung Specific Properties
ro.build.PDA=I897UCKK2
ro.build.hidden_ver=I897UCKK2
ro.build.changelist=614489
ro.flash.resolution=1080
# end build properties

Download:

http://hotfile.com/dl/134740075/bf85278/SGH-I897_I897UCKK2.rar.html

Pass: sampro.pl
[Captivate Android Development] morehush:
God damnit.
[Captivate Android Development] designfears:
It's just going to be one of those weeks... :-D

Would be great if you could post one of these for the Fascinate too.
[Captivate Android Development] 4-2ndtwin:
Thanks again !! :D

Sent using xda premium app
[Captivate Android Development] IlluminatedOne:
Damn you Samsung! another nightly.. :p

Thanks Prezkret!
[Captivate Android Development] LOSTLOGIC89:
In a day or two kk3 I presume...lol.
[Captivate Android Development] :
Thank you
[Captivate Android Development] billd104:
Here we are again. Flashed w/ full reset before and after. All seems well so far.
[Captivate Android Development] Johnsondr80:
Scheduled for Monday - mid morning!

:)
[Captivate Android Development] stoobie-doo:
Stock kernel

Here's the stock kernel extracted from the archive for those who need it.

EDIT: Attachment pulled. I used 7-zip to create the TAR which was creating problems. Use the attachment posted by nakedninja42 posted below.
[Captivate Android Development] mattern1974:
Damn you!! And bless you at the same time!!! :rolleyes:
[Captivate Android Development] rajendra82:
Jeez, I just got KK1 set up. And now this. Samsung is so leaky when it comes to unofficial update, but sits on going official for eternity. Are they schizophrenic?
[Captivate Android Development] popfan:
I am almost willing to take bets on KK3 dropping by Monday.

KK1 has been decent so far, but just had a random thing happen when it went to sleep, it really went to sleep. I could not get it to wake up, pressed power button and all hard buttons without any response.
[Captivate Android Development] 4-2ndtwin:
Yeah, +1, I had a charge of death earlier on kk1 (completely stock) and was gonna keep an eye on it to see if it would happen again...oh well, on to KK2. :)
[Captivate Android Development] billd104:
Google maps & navigation seem to be broken. Constant hang and force close when using either. Also had phone become unresponsive from sleep (COD) so it seems that KK2 is buggy at best.
[Captivate Android Development] 4-2ndtwin:
Working for me. This is a non-wipe firmware, so depending on what u were running before, u may have to do a factory reset to get a fresh start. But first u could try to clear data for Maps under Manage Applications and see if that helps.
[Captivate Android Development] stoobie-doo:
Did you update Maps in market to the current version, or running the version from the ROM?
[Captivate Android Development] 4-2ndtwin:
^ me = Version that came with KK2.
[Captivate Android Development] stoobie-doo:
Probably worth both clearing data and updating in market (I know KK1 updated after I installed last night) to eliminate possibilities.
[Captivate Android Development] rfound:
Maybe they are getting close to a final release. One can only hope.
[Captivate Android Development] rajendra82:
No problems with Maps or Navigation here.
[Captivate Android Development] tmanonyx:
Running KK2 now. So far all is okay.
[Captivate Android Development] eNemy-:
Wow just about to install kk1 and now decided to wait kk3 :D
[Captivate Android Development] TonyStark R.I.P.:
Hmmmmm well so far so good (holding breath)
[Captivate Android Development] billd104:
Found SUPL settings for GPS had reset, changed those back to updated settings and Maps and Nav now work. BTW I did a full wipe both pre and post flash. I always do.
[Captivate Android Development] Oxicottin:
Modem

The UCKK2 modem was uploaded to the I897 section of my website in my sig or image below. Thanks!

Please hit the THANKS button if this post helped....
[Captivate Android Development] crt60:
Yeah, don't these things get released in 3's...
[Captivate Android Development] jjbarisax:
After I installed KK2 - I got an automatic update of Maps from the market - seems to be ok
[Captivate Android Development] 4-2ndtwin:
4's this month. Lol

'cause there was kh3, ki1 & 2, kj1, 2 & 3...so obviously this month is kk1, 2, 3 & the 4. :D

Sent by XDA Premium App
[Captivate Android Development] Kyuta Syuko:
Damn I had just packed my Kernel last night... Guess I know what I'll be doing tonight...

Maybe I should do that too...
[Captivate Android Development] billd104:
Working fine for me now... Not sure why it was freaking about the GPS settings but ???