yashsingh1/xdaforums huggingface dataset:
[Xoom General] stevebakh:
It seems that there's a false dichotomy here; the options aren't only trickle charge by usb and wall adapter with the proprietary connection. What about a wall charge via the usb port? I don't see why the usb port couldn't be used for the charge. I can trickle charge my n1 or I can plug it into an outlet, which charges the phone much faster. I'm sure the xoom could have been designed to suck in more power when conected to an outlet.

The only plus with the proprietary port is that we can charge and have the xoom connected to a computer or peripheral at the same time.
[Xoom General] Kippui:
this, I love how fast it charges
[Xoom General] goofballtech:
This cannot happen because you can push 5 volts at a 12 volt battery all day long and it will not charge.

Take a car for example. Your car battery is a 12 Volt system (in most cases). For that 12 volt system your alternator has to output between 13.5 and 15 volts to charge it while the vehicle is running. If you would replace the alternator with one that output 10 volts, the battery simply would not charge enough to maintain your car running, and certainly not enough to start the vehicle after being at rest for any amount of time.

Volts are not stackable, you cannot push 5 volts for a long time and eventually get 12 volts. The only way to charge a 12 volt system with a 5 volt supply is to have a transformer that will convert 5 volts to 12 volts inside of the xoom itself. Even with this in place... 5 volts at 500mA supply is 2.5 watts of power. If this would be converted to 12 volts it would only be 208mA on the 12 volt side.

Even if the xoom had the internal hardware to do this "trickle charge" wouldn't even describe the time it would take. At full power of the usb port for 100% of the time you could only pull 14% of the power provided by the proprietary plug.

I understand you are going to say "Well, that would be better than it not working at all" but then we have another side to think about.

Our USB plug having OTG capability also adds to the circuitry inside the xoom's USB port. Unlike on a phone that may have this capability and be able to charge there as well it wouldn't all be running on a all 5 volt system.

You would have to have that one port:

Provide 5 volts from battery through 12 v to 5 v conversion hardware for OTG

devices

Intake 5 volts from cable to convert to 12 volts through other hardware for charging

Since i have not seen board level drawings for the hardware inside the xoom i cannot say how the existing OTG conversion is being done but i can guarantee that down converting voltage levels is usually much easier than up converting.

Motorola may have reasons other than i have stated or they may fully intend to implement changes in the future that will allow trickle charging, i cannot speak with authority on either topic because i do not work for Motorola.

I just wanted to make people aware that it's not as easy as it sounds for the size of the xoom to just "enable" the usb charging on the xoom. Unless the hardware is already there and ready there will be no easy way to do this. Software can do a lot of great things, but it cannot convert voltages.

On a side note:

If anyone has drawings of the usb port or really any of the circuits inside the xoom i would love to see them and see exactly how it is handling everything at a board level inside the device.

Hope i didn't ruin anyones plans for USB charging.......
[Xoom General] markread644:
XOOM Charging

Some Motorola Infor for us

The XOOM has got a couple of 3.7V LiOn polymer batteries (in series) to give 7.4 volts. If that is the case, then our 5V USB can never charge it even on trickle. Hence the 12V charger.

"3250 mAh, 24.1 watt-hour lithium ion polymer battery"

http://www.ifixit.com/Teardown/Motorola-Xoom-Teardown/4989/1

watts = volts x amps

volts = watts / amps = 24.1 / 3.250 = 7.41 volts
[Xoom General] Psychokitty:
For those "In The Know" who are so happy to have "finally" found others who "understand", you seem to missing the whole point of the OP.

Motorola made a ****TY PROPRIETARY JACK!

What the hell did all the tablet companies do, draw straws?! That seems the likliest probability given the needle-**** jack half hanging out of my otherwise ruggedly constructed Xoom right now.

Anyone who's tried to make a laptop last a few years knows exactly what will happen here in short order.

Proprietary or not, it's simply the worst power plug setup I have ever seen. The fact that the rest of the tablet is so well crafted gives cause to wonder wtf Motorola engineers were thinking.

It's not whining. It's not anti proprietary "we hate anything ressembling Steve Jobs like elitism in technology". It's not that we're all stupid and we just don't "get" it. It's an observation and collective recognition of the fact that Motorola screwed up the design of this very important component for which robustness is essential to the longevity of the entire product.
[Xoom General] ntron1:
10 Char to make Psychokitty happy :)
[Xoom General] Psychokitty:
Do you troll the forums looking for threads that might have complaints in them just so you can tell people to stop *****ing? Did you even read the damned thread before you did that?

The only ones beating a dead horse here are the morons still stuck on the idea that we're all here to complain instead of actually trying to find a solution to the problem.

The recieved amperage can be changed in the kernel, according to BRD. Adapters don't all put out only 5VD @ 500 mAh.

If the micro USB jack gets yanked sideways, it's less likely to damage the port, and it would'nt matter much if it bent the jack (which is unlikely anyway).

If the Motorola power jack gets yanked sideways, it will likely damage the port and almost certaily bend the jack.

It's a friggin' problem. We're trying to postulate a solution. Get lost.

Yeah. I'm gonna go file a lawsuit on my way to the store to get a different tablet.:rolleyes: WTF?
[Xoom General] e.mote:
It's true that you can't charge a 7.4V battery with a 5V source, but that assumes that a USB charger is only capable of 5V. While true for charging from a PC USB port, you can find 12V output USB chargers.

http://google.com/search?q=usb+charger+"12v+output"

However, it's likely that the micro-USB port isn't set up to accept the higher voltage/amp, and you can well burn out some circuitry and killing the device. A safer and simpler method is to attach a regular USB port to an unused space on the PCB (and dremel a hole in the shell), then daisy-chain it to the power port with jumper wires.

It's a straightforward hardware mod, but it would obviously void the warranty.

A simpler solution is to find a right-angle adapter for the power-plug, to alleviate the lateral torque against it by inadvertent sideway hits. This is what the main complaint is about. Somebody would need to measure the outer diameter of the plug barrel with a caliper, and go eBay shopping. Unless it's a proprietary size that no one has used before, you can probably find something by searching for 'phone charger plug adapter'.
[Xoom General] firewuff:
Hi... I'm an engineer.. heres the basics

Here is the basics

Volts x Amps = Power This is what we case about (ignoring power factors etc)

12V@ 1.5A is 18 Watts

the most a USB port can supply is

5V @ 0.5A = 2.5Watts

You can step up the voltage from 5V to above 7ish volts but it takes more hardware than going the other way and is inefficent. Assuming it was 100% efficent and it takes 1 hr to fully charge the Xoom on the external PSU, a USB charge would take 7+ hours to charge In reality it would be closer to 10 hours...... not really worth it for the additional expense and weight required, not to mention that the device would have to be off or the USB wouldn't even supply enough power to keep it running.

or simply put would you expect your netbook to charge from a USB cable? it uses about the same amount of power....

As for the proprietry connector? WTF? every connector is standard on the Xoom, MicroHDMI, MicroUSB, you can even get another psu with that power connector online for about $30 or just the plug from electronic stores for about $1.

....yep
[Xoom General] BrokenPixel:
Wrong dude, USB can put up to 2A.. If not check on the iPad it draws 2A from the usb that's why some cheap netbooks and laptops can't charge the ipad from usb. Anyhow if we were to charge our xooms tru USB it'll take 6+ hours, and I don't know many people who like to be tethered to a power plug wile having everything else wireless...

I myself own a Standard dock I got silly cheap, so no complains here, it works perfect and I don't have to worry about janking the power cable the wrong way.

and the plug itself is the same as Nokia's, propietary? no, crap? hell yeah!
[Xoom General] firewuff:
a) have a read http://en.wikipedia.org/wiki/Universal_Serial_Bus#Power

b) USB may be able to supply more current than that but it's out of spec and not guarenteed. If a device reports it will use 5 unit loads (500mA) and draws more then it could damage the port or make other devices unstable/unusable which is why Apple limits the current draw when charging from a USB port.

c) Again have a read http://en.wikipedia.org/wiki/IPad#Power_and_battery

d) know what your talking about or at least spend 5 mins reading before responding.

BRETT
[Xoom General] ed.dark:
Wrong!!!!!!!!!!!!!!!!

thats watt-hours not watts!
[Xoom General] Psychokitty:
I have adapters with USB ports on them that put out a lot more 5 volts.

Once again, we're not talking about having the capability to charge the Xoom from a laptop! Maybe YOU should at least spend five minutes reading before answering.
[Xoom General] markread644:
Correction

watt hours = volts x ampere hours

:-)

P.S. and milli ampere hours = ampere hours * 1000
[Xoom General] markread644:
I am truely intrigued with a USB charging device that puts out more than 5.00 V DC +/- 0.25 V. I would not want to charge my USB ported device (whateveritmightbe)
[Xoom General] ed.dark:
true but your calculation is wrong. Ah is a measure of the charge capacity of the battery.

1Amp = 1 coulomb/second

therefore an amp hour is a measure of the total charge. Nothing to do with how much current the battery can/will deliver.
[Xoom General] alias_neo:
I'm joining this late here, but without going into the figures, USB spec simply doesn't support these kinds of voltages the XOOM needs. For Motorola to make the USB port support these voltages not only would they be out of spec but also dangerous as its connector and charger would fit other devices it would kill.

Trust me here, there was no gradable option for moto to allow USB charging of the XOOM.
[Xoom General] Divine_Madcat:
I have to admit, i am quite suprised at all the people saying that higher amp charging is not possible.

Take the Nook Color for instance. Its only port is a standard looking micro-USB port, that will indeed take micro USB cables. Plugged into a computer, it will trickle charge.

However (and the relevant point of this), is that the port is also capable of taking in 5v, 1.9A, more than enough to charge the 4200mAh battery quite fast (around 90 min). The cable that is included is actually a lightly longer version of micro-USB, with extra pins at the very end for the extra current.

So, what it comes down to, is that there was still no need for a special cable. The 1.9a works just fine and safe, and the device can still charge (admittedly, it will only really charge if it is sitting idle) and use regular micro-USB if need be.
[Xoom General] bigrushdog:
I let you guys debate watts voltage amps and all that. All I know is USB charging is definately supported in our Android build. Take a look around mount manager in services.jar. It there.
[Xoom General] markread644:
There is loads of confusion on charging here. I would like to add some more. Before I spout, I completely agree that the needle jack charger plug on the XOOM is cr*p and will break soon. I have bent it all too easily and they could have made something better.

To charge a battery you need to force current in to the device. To do this you need to overcome the internal voltage and resistance by having MORE volts than the battery and if the battery is 3.7 volts, a 5 volt power source is generally standard.

The amount of current you force in to the battery is a function of what you can get away with in terms of temperature rise, gas produced, internal resistance etc. Anyone blown up a NiCd by charging it so hard that the little gas vent hole in the + end simply couldn't depressurise the internals ?

So the comments raised on why the XOOM cannot be USB charged stem from the fact that the Xoom appears to have TWO 3.7 V Li batteries in series giving 7.4 volts. That means to charge it you need more than 7.4 volts and the USB spec only allows 5.00 V +/- 0.25 so unless you make a special USB (not permitted to be called USB and dangerous 'cos you could fry regular USB devices with it) charger, or invert the 5.00 VDC to AC, step up the voltage and DC it again (expensive, inefficient and bulky) you cannot charge 7.4 volts from a 5 volt source. Ever. Not even on trickle.

Current, the amount you pump in can be amped up. My Nexus S internal charging circuit limits its charge to 500 mA on AC to stop the battery getting too hot and blowing up (so they claim)

The XOOM charges at 1500 mA and doesn't seem to complain or get hot. It could probably take more.

NOOK

According to the spec

Battery: "Barnes & Noble" labeled 3.7V 4000mAh 14.8Wh Li-ion battery

can easily be charged from a USB source though a trickle charge of 500 mA from a LAPTOP or certified USB charger would take a long time ! 8 hours theortical max

If you are USB you are stuck with 5.00 V +/- 0.25 V or it can't be called USB.
[Xoom General] markread644:
Firstly, I have no problem with open discussion and disagreement :)

What I would like to clear up is that the capacity of a battery when quoted in mAh is indeed a measure of how much current the battery can/will deliver. A 3000 mAh battery will deliver (theoretically) 3000 mA for one hour; or 1500 mA for 2 hours. Or 150 mA for 20 hours.

Maybe we (and the battery industry) mis-apply fundamental definitions, but 3000 mAh means 3000 mA is theoretically possible to be drawn for one hour.
[Xoom General] e.mote:
I think the call for USB charging is mainly due to the flimsiness of the power plug barrel, specifically, its vulnerability to a sideway hit.

One way to reduce the plug's vulnerability is to build up its lateral bulk, i.e. to make the plastic body of the plug bigger, at the same time form-fitting it to the curvature of the tablet shell.

A simple hack to do this, is to use a glue gun and melt heated glue around the plastic body. To form-fit it to the tab shell, put a plastic bag over the tablet (lightly oiled so the glue won't stick to it), and have the adapter plugged in as you apply the glue.

You'll end up with a blob around the plastic body that has enough surface contact with the tablet to reduce lateral torque from a sideway hit.

For better aesthetics, you can sandpaper it down to smooth the surface, and spray paint it black.

A more professional method would be to unsolder the existing power jack, and replace it with a more robust jack, something like this

http://cgi.ebay.com/10-Pcs-Female-DC-Power-Jack-supply-socket-3-5X1-35mm-/300561122469

And replace the adapter with one that has a matching adapter plug. 12V 1.5A adapters are a dime a dozen; you can easily find one with a right-angle plug if you want.

http://shop.ebay.com/i.html?&_nkw=12v+1.5a+adapter

The drawback to this latter is that the warranty would be voided.
[Xoom General] goofballtech:
I have no doubt that's its there, phone running android allow usb charging. You have spent more time than most of us digging around in there. Aren't there a lot of things in there that are not even used in the xoom but still included in the base image for android os? I know I have a wifi xoom amd I see quite a few things in there I have no way to use.
[Xoom General] FudgeMutator:
Physical issues aside, I like the separate charger port because I can write code for usb peripherals taking up the micro usb slot all day while charging the thing. It would be pretty annoying if I had to take a break and let it charge.
[Android Software/Hacking General [Developers Only]] stang68x:
Hey everyone,

So, long story short, I was moving from a Droid X to a Droid Charge, wanted to keep my apps etc, Titanium backup'd the Droid X stuff and restored on my rooted Droid Charge. Some apps were overlapped and issues arose. I sorted them all out except for the Calendar. It wouldn't launch so I thought I had to do what I did with the other overlapped apps and delete it. Welllll...now I can't re-install the Touchwiz calendar. Furthermore, I thought deleting all Calendar related APKs would be a good thing and now I don't even have an option to sync my Google Calendar on the phone, under My Account. Can anyone help me re-install it? Or any calendar for that matter?

Thanks!
[EVO 4G Q&A, Help & Troubleshooting] tvotony:
OK I am new to the evo forum........... THis is more so to help my dad who's battery is dying so quick on Stock Turbo rom by Rick Simon......... I need some help on which is the best 2.2 sense rom and kernel for it and any other krazy ideas. I am a mytouch 4g user so If you could pm me that would be best. Thanks for the help
[EVO 4G Q&A, Help & Troubleshooting] untruestory:
I don't notice a big difference with sense ROMs but I like the latest MikFroyo and in my head I think that not having CIQ running in the bg and transmitting data helps. I get the best results using netarchy cfs-nohavs-suv-sbc using the conservative governor underclocked @ 128-768. I rarely notice any difference in the performance. Droidwall helps A LOT. I block most everything and use the widget to turn it off if I need something.
[EVO 4G Q&A, Help & Troubleshooting] HipKat:
The best thing for the battery is not the ROM, it's the setup and if the battery has been conditioned or not.

I extended mine by a HUGE amount, just by turning Data off, and leaving WiFi on. If I need data, and there's no hotspot available, I turn it, do what I gotta do and turn it off.

For conditioning, check my signature.

It works wonders....
[Verizon Droid Incredible 2] NCARCER8EM:
I have been searching but have found nothing on this. My son has the DI-2 and I was trying to find the "My Files" folder but it is nowhere. He does not have an aftermarket launcher yet so the folder can not be hidden. I feel stupid posting this but I am at my wits end on this?

Samsung Captivate

Droid Charge

HTC Droid Incredible II​
[Verizon Droid Incredible 2] dco717:
We don't have a app for files just go to the market and download astro file manager

sent using my droid incredible 2
[Verizon Droid Incredible 2] NCARCER8EM:
Wow - appreciate the response and now I feel better. Can't find what is not there!

Thanks!
[HTC Inspire 4G] ngandjui:
hello

I just bought a 32 gb card for my inspire 4g, the problem is that i had use the 8 gb original card to create my gold card and now i want to know if i can install a rom from my 32 gb who is not a gold card or if i absolutely need the 8 gb to install roms.

i dont want to turn the 32 gb into a goldcard, i am afraid i could spoil it. anyone tried to create a coldcard with a 32 gb and succeed ? the card is from the brand kingston
[HTC Inspire 4G] newter55:
You don't need the goldcard anymore. Hopefully ever.....considering HTC CEO statement today regarding bootloaders. The goldcard was only required during the initial downgrade to obtain s-off.

You can load your new card up with roms and flash away.
[HTC Inspire 4G] ZeroRilix:
My opinion is to not turn that 32gb card into a goldcard, cause that'd be overkill x8! You actually shoulda got a 4 gig card for the goldcard, but that's alright tho. Since you already made a goldcard, you don't need to make another one. If you have to use a goldcard again, which is very highly doubtful, you already have one. Like newter55 said, you can load up and flash away to your hearts content. Now, I'm not sure when, or even if, our bootloader will be unlocked. However, if they say ours will get unlocked, then the earliest to expect that would be when we get our official gingerbread update.
[Xperia Play Themes and Apps] emann56:
http://www.droid-life.com/2011/05/2...ice-check-should-work-on-all-android-devices/

The updated netflix app works on xperia play. Videos still streams with the ugly colors and the green bar:(

http://www.mediafire.com/?4xwncz7doz475tj - Netflix apk

Let me know if i'm not allowed to post that link but since netflix is free I would think it's allowed
[Xperia Play Themes and Apps] thatsupnow:
This app works absolutely perfect on my x10 no green bar no colour run just perfect quality
[Xperia Play Themes and Apps] emann56:
Arugh how come it doesnt work well on the xperia play:confused: Isn't the xperia play better than the x10!?
[Xperia Play Themes and Apps] elinscheid:
Works ok for me on my Xperia Play. Thanks for posting.
[Xperia Play Themes and Apps] thatsupnow:
You don't have any green bar going across the top on your play? Damn my play does but not my x10 makes no kind of sense plus I just don't believe you, why would yours would perfect and nobody else it's all the same download unless......
[Xperia Play Themes and Apps] radio five:
Yeah, I've got the green bar as well. And the picture isn't very good quality. Still, it's awesome to have Netflix working. I wonder how long it will be until it's officially supported.
[Xperia Play Themes and Apps] thatsupnow:
Well I wonder why it works perfect on the x10? How much difference can there be between the two?
[Xperia Play Themes and Apps] fenix4o9:
Doesn't work on u.s. play i get green bar too i hope netflix will support this phone soon
[Xperia Play Themes and Apps] giventofly17:
Download link is bad
[Xperia Arc General] rumnyc:
i have 2 problems with media go:

1) once i connect the phone, it gets stuck 'generating thumbnails'. i have 55 pics and it always gets stuck after a few files. anywhere at 12/55 to 40/55. I can never get it to finish generating.

2) i have some iphone videos that I want to transfer to the phone. i was able to add them easily to the library and when i ask it to transfer to phone, the step goes to 94% but never completes. the cpu usage of my PC indicates that it finished transcoding but never finishes copying.

I even tried copying in USB transfer mode, but that also never completes. Tried swaping out the USB cable as well but that did nothing.
[Xperia Arc General] karthik.chopper:
There is one more way if you want to use the media-go.

Before connecting it to the computer, go to settings and storage and unmount the sd card.

Click on the notification of safe to remove the card.

Now mount your card and after a few seconds connect it to your computer and open media-go

Wait for sometime till it finishes the generating of thumbnails else your transfers get stuck arround 90%.

I did it and it worked for me. Check if it does for you too
[Atrix 4G General] wirednix:
HTC just announced a little over an hour ago that it will no longer lock any of the bootloaders on their devices.

Link to FB post: http://www.facebook.com/HTC/posts/10150307320018084

Here is the site where Sony Ericsson users can unlock their phones:

http://unlockbootloader.sonyericsson.com/

This is a quote from Motorola in regards to the locked bootloder:

Shouldn't Motorola follow the current trend and open their systems?

What do you guys think of HTC and Sony Ericsson's actions?
[Atrix 4G General] eallan:
Well, we love them! Mototola is a terribly frustrating company. Good riddance.
[Atrix 4G General] blindguyinanorgy:
If only there were good HTC phones in att when I bought this phone (still love it)

Sent from the bowels of hell...