yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Accessories] bladebarrier:
Interesting.

Are you getting the same readings when the device is turned off, to ensure there isn't a possible software issue? Is this purely on the stock ROM/kernel, or are you using a custom one?

With the Droid X, there were some concerns that it was unable to charge a fully discharged battery if not on a stock ROM, because Moto implemented measures in the "bloat" that allowed it to do so when it would normally not be capable in pure Android. I remember people having to cut wires to charge batteries externally, if they ran out of juice while trying to flash a ROM that was not Moto based. The whole concept seemed absurd to me, yet that was clearly the case. A dead Droid X could charge normally, if on the Moto software, but could not charge at all, if on AOSP if the battery was completely discharged prior to the attempt.

Just throwing out some ideas. I don't have your level of equipment to test it out at home, but I could take mine into the EE lab and see what one of the students can discern.

Is it possible that some of this is because of the pogo connection, and that may not be sorted out well enough, as such causing complications to the circuit?

EDIT: What is the accuracy of Current Widget? I tried it on my Nexus 7, and it was reporting some absurd numbers that didn't appear to be accurate. I would be charging at normal speed, and it would show me as discharging. The Nexus 7 would go back to 100%, and the whole time it would read as if I was losing power. I uninstalled it, figuring there is a compatibility issue with either JB or the device.
[Nexus 7 Accessories] Entropy512:
I can only confirm CW works properly on CM10. It is completely nonoperational in stock (as the code was disabled), and they did something in that area in 4.2 that I haven't taken a look at yet. I know the voltage value was off by a factor of 1000 in stock 4.1.

As to software issues - there are none other than whatever nonvolatile defaults are preprogrammed into the SMB347. If you look at the SMB347 driver for grouper you'll see that it does almost nothing in terms of configuring current limits and such, relying on the internal NV defaults. (Very different from Kindle Fire and Note 10.1, which perform quite a lot of configuration of the chip, not relying on internal NV defaults.) I've seen people report similar behavior on multiple kernels and firmwares.

Based on the Kindle Fire sources, there is at least one AICL setting that can be tweaked. However after looking at them further, I think that's the one that hits when the power supply droops to 4.5 volts. The question is whether the charger circuit is doing limiting before hitting that severe AICL threshold. When I get back from my holiday I'm going to try changing the threshold to 4.2 volts to see how things behave.
[Nexus 7 Accessories] bladebarrier:
You're way above my pay grade.... Yet I'll speculate further.

If it's hardware based, to drop the amperage draw, based on a voltage drop, and can be replicated in CM, then it could be an intentional protection circuit in the Lion battery itself. There are many Lion batteries that use protection circuitry these days, yet I don't know of anyone using aftermarket replacements for the Nexus 7, and so testing it could very well be basing the tests purely on the battery itself.

Maybe try running the tests directly to the battery, removed from the Nexus itself, and that will at least exclude the software and the hardware of the Nexus.

I could crack open the body and check the manufacturer, but if it's Panasonic or Sony, there's a reasonable chance that there are built in circuits on the Lion itself.

If you get identical readings, while running leads directly to the battery, the issue will be known immediately. If you don't, we can rule out one of the three options (battery, hardware, software). And you already ruled out most of the software.
[Nexus 7 Accessories] Entropy512:
No way it's the battery itself. If you ran straight 5v into a LiIon/LiPo battery you'd blow it up (unless the protection circuitry kicked in). Running 5v straight into even a protected LiIon is an extremely bad idea.

It's something in how the SMB347 behaves - http://www.summitmicro.com/prod_select/summary/SMB347/SMB347.htm - Unfortunately there is no public datasheet, just a 1-2 page "product brief" with little detail, other than it does have some sort of automatic input current limiting. The SMB347 is the chip responsible for charging the battery safely, and basically anything related to charging the battery in the N7 is within that chip. Understand that chip and you understand everything about charging the N7.

The only technical detail we have about this chip resides in kernel source code for devices with the same chip - Samsung Note 10.1 and Kindle Fire both have a 347, and unlike the N7 which appears to use nonvolatile defaults burned into the chip, these devices touch the chip's registers. The KFire source has some info on how to change one of the AICL configurations.
[Nexus 7 Accessories] bladebarrier:
Without a doubt!

I would never suggest someone use the method for normal charging. You would have to be capable of limiting the current, and be very careful, if testing in that manner.
[Nexus 7 Accessories] FenrirMX:
I don't know how useful this comment will be, since there's no technical data, just empirical evidence, but I've used a friend's Nexus 7 charger several times on my Xperia S, that has fast charging enabled by default, and it charges noticeably faster than the charger that was packed with it (850 mA).

So, I'm inclined to think the culprit is the SMB347 chip.
[Nexus 7 Accessories] Entropy512:
It's the SMB347 combined with the power supply. The PS is drooping a little bit (not significantly), and the SMB347 is being exceptionally finicky about the droop.

Supplies that don't droop (Samsung Tab chargers - FYI, the Note 10.1 also has an SMB347) are OK, that supply is likely OK with less finicky devices.

Next on my project list:

While the setup used here (22 gauge sold wire that is only a foot or so long) is ideal for eliminating voltage drop in the USB cable, I need to whip up a "universal charging adapter" between my bench supply and a female USB port that uses Samsung tablet resistances (which are also OK for most standard devices). That way I can see how my Note 10.1 behaves with a current limited supply.

A power supply tester - PWM out of an AVR microcontroller into an adjustable constant current load, ramp up the current draw and monitor the supply voltage with the uC to get an output I/V curve for various supplies.
[Nexus 7 Accessories] Crystawth:
current widget

My apologies for reviving such an old thread, but I have been searching for information about how the nexus 7 charges and why of acts so different with different chargers. Your posts have been very informative. I have found that my Verizon car charger will charge my nexus considerably faster than any other charger I have, including the one which came with the tablet.

I am curious to know how you were able to use current widget on this device. I am running cm10. Which kernel has support for current widget so that I may flash it? I am using battery widget for the time being and while of does give me a rough estimate, I would really like a real time reading.

Thank you for your time.
[Nexus 7 Accessories] Crystawth:
I actually stumbled on an answer myself.

Franco Kernel r65 for 4.2.2 on CM 10.1 Provides battery current information =)
[Nexus 7 Accessories] Entropy512:
I never saw this particular post of yours until trying to find this old post of mine. :)

N7 does not support CDP (Charging Downstream Port) detection. Few Android devices do. (N7 2012 most definitely does not, and I'm fairly certain N7 2013 doesn't either). If it sees a downstream port, it assumes it's an SDP (Standard Downstream Port) with 500 mA current limit. This is a fundamental requirement of the USB standard - don't pull more than 500 mA from a host unless you support CDP detection and detect a CDP.

N7 does support DCP (Dedicated Charging Port) detection. N7 will ABSOLUTELY pull more than 500 mA from a DCP (this includes the wall supply) when D+ and D- are shorted.

If you want to communicate with the device and supply more than 500 mA, you need either a device that supports CDP detection (rare) or you need to violate the standard. This can be done with kernel modifications that override the current limit when an SDP is detected - this is usually a HORRIBLE idea but is acceptable in a specific case like yours. (Some kernel hackers refer to this as "USB Fast Charging").
[Nexus 7 Accessories] Charles IV:
Sorry for posting on an old thread, but it is still an issue, and i am determined to find a fix.

I bought a thick 20awg cable, and that seems to do the job, but i don't use my n7 enough to see if it really does.

You referenced the kernel a few times in reference to the chip that controls the charging.

I was wondering if it would be possible to modify kernel sources to change the way the chip behaves, although i dont have many hopes, because i imagine it would have already been done

i was thoroughly engaged in this issue, and even resolved to build my own dock, and bought the pogo pins, but have never used them!

Even if there isn't a way the change the chips behaviour, i was wondering if there was another workaround on the kernel/software side, as i am certainly up for the job, even though not very able as a developer, and always needing to be pointed in the right direction.
[HTC One X+] Gerolamos:
Also posted in HOX forum, but should be here... So here again:

I'm trying to install Clockwork recovery mod 5.8.4.0 on my HOX+. I've unlocked etc and flashed it to the device successfully. Now when I go to recovery it shows the HTC screen and then the phone turns itself off. even after multiple attempts, nothing...

Any tips/tricks?

Is it the HBOOT version maybe? I have 1.35.0000
[HTC One X+] skdubg:
install TWRP from http://www.teamw.in

fastboot erase cache

fastboot flash recovery (name of recovery).img

fastboot erase cache
[HTC One X+] AndroHero:
If your posting in the HOX forum. Does that mean you also flashed CWM for the HOX? Because it's not compatible with the HOX+.
[HTC One X+] Gerolamos:
Ok done that... Worked like a charm.

Then flashed to InsertCoin and failed, tried to recover, failed. TWRP wouldn't boot.

So I tried installing my RUU again (2nd time in 2 days), but during the signature verification process it suddenly stopped, got an error. Now I'm stuck at the black screen with silver HTC lettering........ Can't reboot nothing! HELP!
[HTC One X+] skdubg:
which TWRP file do you download and flashed?

to install RUU you need to relock the bootloader
[HTC One X+] Gerolamos:
Got TWRP working finally and managed to restore my backup.

There seems to be something I'm doing wrong here... Every time I flash my device, I keep getting stuck in airplane mode and it wont get out... So, no cell reach or wifi. Does anybody have a suggestion what it might be?
[Sprint Samsung Galaxy S III] humdrum2009:
Phone won't fully boot blue light pulses. Makes boot sound but. Doesn't boot.

Haven't. Tried. Full factory tape as of yet. That's next on the list

anyone else seen this and if so how did you Fix it.

I can Odin both factory And CWM recovery with no problems.
[Sprint Samsung Galaxy S III] CNexus:
Did this happen after flashing a new rom? If so, then try going into recovery, wiping everything at least 3 times and then flash the rom again

It could also be a bad download if you were flashing a rom

And if you weren't flashing, how did this happen? All of a sudden or right after doing something? Some more info would be nice

Sent from my PG06100
[Sprint Samsung Galaxy S III] humdrum2009:
Did a full Odin factory restore.

Lately I've been getting bad downloads

Something on my pc is the culprit.

I suspected avast pro.

Un installed and downloaded rom. Again booted. Reinstalled avast bad download again.

Oh well I have a new windows 8 laptop

I only use for phone rooting that works great no extra security needed.
[Sprint Samsung Galaxy S III] milky1112:
Avast will flag all the roms as a virus and kill them about half way through the download. So when you go to download a rom, Suspend Avast (usually an hour), also, make that folder you have them going into exception from the scan. I had this problem with Avast on my computer as well. Try that and should be ok. (It did it when downloading TPR.. it's a rather large file (900mb) and i was stopping around 300.) Hope it helps!
[Sprint Samsung Galaxy S III] CNexus:
Ahh bad download, yeah. Most sites give you an md5 hash like dev-host or goo.im, you should always try to check the hash of your file against it so you can be sure there are no issues. It can be frustrating, but I have seen occasions where the person finally got the rom to work after literally downloading 10 times

Sent from my PG06100
[AT&T Samsung Galaxy Note II] asd5351797:
i cant say it clearly,the everything in root directory was deleted ,and then,my phone display that it is not registered on the network,my phone is note2_n7100

can someone tell me what to do?

thanks.
[AT&T Samsung Galaxy Note II] cjsspape:
Can you get into recovery? If so wipe your caches and re flash your Rom. That should replace any missing files without you losing anything you want. If you want to use a different Rom then you have to full wipe otherwise you'll have compatibility issues.

Edit: you said you were on the n7100 though so make sure you flash the n7100 Rom
[AT&T Samsung Galaxy Note II] asd5351797:
i were do as you say,but，it change nothing with my phone,i think that it may be the problem with hardware，some more way to repair my phone?
[AT&T Samsung Galaxy Note II] asd5351797:
i were do as you say,but，it change nothing with my phone,i think that it may be the problem with hardware，some more way to repair my phone?

and the IMEI of my phone was changed,is not this reason?
[Galaxy S II Q&A, Help & Troubleshooting] lexaniji:
Hey there.

How can I get back to stock ics with mobile odin. And where can i find a rom?

Kind regards
[Galaxy S II Q&A, Help & Troubleshooting] MistahBungle:
Another one who couldn't be shagged waiting for a response to a thread they created a few hrs ago. And another thread that's going to be closed.

You do not create another thread purely because you don't get a response to a thread you created a few hrs ago. People here aren't at your beck & call; this isn't your personal tech support hotline.

You create a thread, and you wait patiently for an answer.
[Galaxy S II Q&A, Help & Troubleshooting] Jonny:
Thread closed as it is a duplicate of this. Please do not post multiple threads for the same thing just because you didnt get a respnse within 5 mins of opening the original thread.

Thanks,

Jonny
[Blade General] MunkyNutz:
Hi, is there a better ROM than Elite 2.3.5 for the ZTE Blade v880 256MB RAM ? (That is all I seemed to dig up from earlier this year in January posts.)

I picked this up for g/f thinking I could flash it same as my San Francisco but never saw it only had 256MB RAM vs (tight as it is) 512MB in my SF.

I'm guessing that Konstakang ICS won't work in it due to size constraints. ?

I have 48 hours to dig up a better ROM for it as it is quite bad/slugish as it is with 2.2.2 stock ROM before my 1-week return warranty expires.

I'll be looking into external SD partition and cache to free up more space as I never knew about this smart trick.

Asian Blade Gen 2

Current partition size:

System 220 MB

Data 162 MB

Cache 37 MB
[Blade General] Faiz Malkani:
You could always try cm7

ZTE Blade | Asus Transformer TF300T
[Blade General] MunkyNutz:
Thanks QuantumFoam !

Going by the fact it is a 256MB Asian blade, will I be able to install clockwork mod on it and install ICS with the trimmed down ROM/cache footprint ? Any known restrictions ? I don't want to brick it due to some obscure code glitch....!

Asian Blade Gen 2 (Stock Sucky 2.2 ROM)

Current partition size:

System 220 MB

Data 162 MB

Cache 37 MB

MY SF is Euro Blade Gen 2 (ICS Konstakang 10/12 ROM)

Current partition size:

System 138 MB

Data 315 MB

Cache 2 MB

On system and cache comparisons, I'd regain 117 MB...significant if an app my girlfriend needs cannot be moved to SD card.

I think the order is :-

Simple root

Use some kind of TPT tool to tweak system/data sizes (?)

Install Clockwork Mod

Dump my ROM (CM7/ ICS) and GAPPS on fat32 formatted SD

Then I have to look for a SD format tool and cache-to-SD-card util. ?
[Blade General] wbaw:
best not to tpt an asian 256mb blade. not unless you find one specifically designed for that particular model. a bad tpt can brick it. clockworkmod can partition & format your sd card, s2e can move your apps & data to an ext partition on your card, then there's no reason to tpt at all & it's better. tpt is only needed for old 'gen1' european blades & san franciscos which were sold with android 2.1. either root it using some root exploit app & use rom manager to install clockworkmod, or use fastboot to flash clockworkmod.
[Blade General] MunkyNutz:
Brilliant wbaw.Thanks

I managed to root,clockwork it and install ICS stable since my last post from a guide elsewhere.

My remaining bug is the partition scheme/cache is still there from the old ROM and I wonder is there an app to do resizing vs a TPT more techie boot level method ?

Current partition size:

System 156MB on 220 MB old space

Data 54 MB on 162 MB old space

Cache 1.19 MB on 37 MB old space

Free space is now............32 MB when there is 100MB that could be reclaimed........aaaaaaaaaaaaah !

Any other must-have apps that will optimise such a tight 256MB internal MEMORY ?
[Blade General] MunkyNutz:
So I have :-

disabled dithering,

set CPU to performance

and enabled 16-bit graphics

found the swiftbootloader to change system size + cache on a windows machine with .net framework

and just used CWM to create an ext partition of 1GB on SD & 256 MB swap................

When I look in Settings------> Apps----------->Running it still has 0-10MB of free ram........with no sign of the SD card overspill Swap.

Do you need to enable SD cache swap somewhere and is this the same as "compcache" ?

I'm 100% determined to crack this 256MB RAM Blade nonsense so ICS works on it smoothly.
[Blade General] MunkyNutz:
Oh well I had to wipe ICS and install a step up from stock , a custom 2.3.7 from one of the ROM's made by a member here.

Just working and no more.

I did all the performace optimizers possible on ICS, made partition on SD ,used app2sd on and on but as it has only 256MB ,facebook, Viber and the OS would just grind it to a halt with the homescreen disappearing or apps just crashing.

I just could not work out how to format the internal SD for optimal sizes or know if the VRAM I set up in CWM was being utilised. I just find it hard at times to follow full-time coder instructions, too many abbreviations that us no coders don't get or steps that are differnent to my screen !!!

This custom 2.3.7 is nice anyway. Thanks. I should have read the small print on the spec sheet before buying. I thought 256MB Blades were well and truly gone.
[AT&T Samsung Galaxy Note II] brian85:
Currently have a nexus 4, but battery life on it sucks. How's the battery life on the note?

I haven't seen the phone in person yet, so hows the screen also? Any issues with this phone?
[AT&T Samsung Galaxy Note II] tyshemi:
I came from a nexus and Iphone5 and sammi gs3 and all I can say is that this phone willnnot dissa point at all very nice screen but lacks ppi that Iphone5 had. But overall great battery and nice big screen its a go!!
[AT&T Samsung Galaxy Note II] NightHawkUndead:
Go buy one now.

That is all.
[AT&T Samsung Galaxy Note II] brian85:
I forgot to mention I would have to pay full price for it
[AT&T Samsung Galaxy Note II] Scythe024:
I paid full retail, don't regret it one bit
[AT&T Samsung Galaxy Note II] jyazzie110:
See this thread

http://xdaforums.com/showthread.php?t=1983053
[AT&T Samsung Galaxy Note II] Alcapone263:
got mine at the beginning of the month.

haven't looked back, absolutely LOVE this phone. everything about it is perfect for me, i use the spen almost every single time i use the phone and multi view is awesome (can't beat texting while watching netflix)

if you have to pay full price, then maybe check around just to be safe and make sure that this will be the phone for you, but i doubt you'll regret your decision if you do take the dive.
[AT&T Samsung Galaxy Note II] twanskys204:
Its funny I visit all different device treads and I never hear anyone switching from note2 to n4,, its always n4 to n2 lol...this phone is top shelf.. had mine from november 2 ,,, nice ride
[AT&T Samsung Galaxy Note II] LittleRedDot:
I'm coming from a note and I'm having a hard time getting past the physical home button. Do you get used to it?
[AT&T Samsung Galaxy Note II] ruinkhan:
The battery on this phone is a beast. I watch movies and browsing net at the same time (with %60 screen brightness). I do this for a good 4-5 hrs. Play Myth Defense for an hour or so.

Guess what? Battery drops %20-30 only. This is pretty amazing.

Compare to my Note 1 this device is much more perfected. You wont regret it.
[AT&T Samsung Galaxy Note II] chokem:
I sold a brand new Galaxy S3 and used the money to upgrade to the Note 2. Best decision I've made and the absolute best smartphone I've owned. You won't be disappointed.
[AT&T Samsung Galaxy Note II] JohnCorleone:
I have the international unlocked S3, international unlocked One X, Galaxy Nexus, AT&T Optimus G, and a few others... got the Note 2 as my second line and it smokes them all. I have paid full retail for a couple of devices. The Note 2 is one that's worth it!!

Sent from my LG-E970 using Xparent ICS Tapatalk 2
[AT&T Samsung Galaxy Note II] kennkmcn:
I've owned a few devices -- an iPhone 3G (several years ago), an HTC Raider (defective, replaced with an HTC EVO 3D), a Samsung Galaxy S II LTE (Skyrocket), a Galaxy S III, and now the Galaxy Note II.

The Note II is by far, without a doubt in my mind, the best device I've ever owned. The user experience and battery life on the HTC's were dreadful (and I'll never buy another HTC product again). The S II LTE was a great phone that I managed to go almost two months without restarting, and the S III was a great device as well.

However, with that being said I tend to use my phone quite a bit (increasingly more than I even use my computer now I find) -- whether it be streaming audio when I'm walking or commuting somewhere, browsing the Internet, managing e-mail and calendar appointments, texting & making phone calls, the list goes on. I was hard pressed to get a days worth out of a single charge before I'd have to run somewhere and plug my phone in, but with the Note II, I can easily manage a day and a half or even two days and not have to really worry.

I've also played with the original Galaxy Note, which offered a decent experience but found that the S Pen was uncomfortable to hold and that outside of S Memo and a few apps on the Play Store there wasn't that much to differentiate it from the Galaxy S II. While many may think that the Galaxy Note II is just a blown up S III, it's not -- there's a lot more functionality baked into the software to take advantage of the S Pen (stuff like Air View, Quick Command, etc.) And you can hold the pen with a lot more comfort and use it accurately.

I've never been happier or more satisfied with a device than I have been with my Note II. Buy one, you won't regret it.
[AT&T Samsung Galaxy Note II] powerwagon:
Get the phone :)
[AT&T Samsung Galaxy Note II] Vandam500:
Battery life on this phone is insane. Normally get anywhere from 6-8 hours of screen on time. One time I got 10 hours of screen on time :eek:
[AT&T Samsung Galaxy Note II] brian85:
Got it yesterday.

Sitting at 71% with 1hr, 50mins screen time. My other phone would be around 10% battery left after that screen time.

Amazing.
[AT&T Samsung Galaxy Note II] slaydog:
The Note 2 is PEERLESS!

:thumbup::):beer: