Develop Bugs

Charging Requirements

Does anyone know what the power requirements are/will be for the XOOM? I expect it to have a good battery, but I still want to set up or simply buy a solar charging system for when I am not home. I might utilize the barometer to try geocaching.
Also, will it be trickle chargeable over USB?

I have the same question on USB charging. We know it has its own AC charger and special port. I asked on another forum this question and will post back if I hear anything.

Xoom manual is out on the web and it clearly states no charging via USB.

Gamul1 said:
Xoom manual is out on the web and it clearly states no charging via USB.
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Click to collapse
I guess the question now is what is the voltage of the charger. It has a car charger so the voltage is hopefully not high. I want to be able to charge it with my 6.5w solar panel.

Gamul1 said:
Xoom manual is out on the web and it clearly states no charging via USB.
Click to expand...
Click to collapse
So how do you charge this thing in your car?

blk98gt said:
So how do you charge this thing in your car?
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Click to collapse
If you have not yet tried the iGo tips/chargers, I strongly recommend you consider. Instead of a gazillion chargers, you change the tip. I picked up one for my laptop that works both in my car and house. It came with tips for almost every laptop imaginable so I can let others charge in my car, too. I am guessing one of my laptop tips might work for the xoom. Also the laptop charger has a USB port so I can charge my laptop and a device off so USB at the same time.

It would seem 5V would be the norm. Its the amperage that I am wondering.
We know the ipad in which this tablet draws its battery comparison uses 5V and 2.1amps.
We will find out soon enough
Sent from my PC36100 using Tapatalk

The charger is a 12V 1.5A charger. The tip is not a common one; definitely small and looks like it will break easily. I hope decent options come soon for using the contact dots.

JanetPanic said:
The charger is a 12V 1.5A charger. The tip is not a common one; definitely small and looks like it will break easily. I hope decent options come soon for using the contact dots.
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Click to collapse
I wonder why they went with this kind of connector. Too bad they didn't spend the money to include some kind of inductive charging system. It wouldn't have increased the cost of the tablet that much, maybe $10 in parts.

I just checked EBay and I found combo silicone case + "micro USB car charger" for the xoom. I wonder if the car charger is legit.

Anyone bought a car charger yet? Motorola's is a bit pricey at $30.

Slimgym20 said:
Anyone bought a car charger yet? Motorola's is a bit pricey at $30.
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i didn't even know there was one... vz/bb didn't have it when i picked my xoom up. i have an inverter but might be good to leave charger at home and just use one in my car. link? 30 is a bit pricey, but in line with what they charge, usually you can get the same thing for 5 on ebay/amazon after a few months. link? all i see are usb car chargers.

diaa08 said:
i didn't even know there was one... vz/bb didn't have it when i picked my xoom up. i have an inverter but might be good to leave charger at home and just use one in my car. link? 30 is a bit pricey, but in line with what they charge, usually you can get the same thing for 5 on ebay/amazon after a few months. link? all i see are usb car chargers.
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Click to collapse
Its just on their accessories page for the Xoom:
http://www.motorola.com/consumers/U...toid=8159a96331fec210VgnVCM10000081bbb00aRCRD

Superslow charging

To charge a phone on USB cable from PC takes me around 9hrs, from car charger around 4.5. Also, USB is not able to supply enough power whilst I`m browsing internet, its still discharging.
220v charger charges fine and quick.
Is it just mine handset or this is how it is?

Thats normal. PC USB ports can only provide 500 mA of current. The wall charger provides 1000 mA.

olivierlee said:
Thats normal. PC USB ports can only provide 500 mA of current. The wall charger provides 1000 mA.
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But why its still loosing juice when I browse internet, even its plugged into USB?

rbs_uk said:
But why its still loosing juice when I browse internet, even its plugged into USB?
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Because your phone is using more power than what the USB port can deliver?

olivierlee said:
Because your phone is using more power than what the USB port can deliver?
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That sucks totally My iPhone could do that. So its not a faulty handset then.

rbs_uk said:
That sucks totally My iPhone could do that. So its not a faulty handset then.
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Click to collapse
Your iPhone is the equivalent of a Corolla. Mass consumed, easy on gas and not very capable.

Yeah this is the same for me. On my old phone i could charge it while using it, but it would charge slowly. I guess the Galaxy Nexus is just power hungry.

your experience is normal and I thought it was strange at first as well coming from a 3gS iPhone. My phone barely charges from my work computer.

That's weird. I can use my Gnex while charging with no problem. Just did it last night. It may charge a little slower, but still charges none the less.
Sent from my Galaxy Nexus using XDA App

CanaganD said:
Your iPhone is the equivalent of a Corolla. Mass consumed, easy on gas and not very capable.
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Click to collapse
The current iPhone is not for me, but it's definitely capable. Honestly, there aren't too many Android phones that are better all around phones. Luckily, I own one of them.

USB Fast Charge mod

Hello I was wondering if there is a mod to have usb fast charge when plugged into the comp. I just came from a Inc and there was a mod flashable through cwm. it was very nice. it charged the phone just as fast as an outlet, if not faster. is there a mod?
thanks

Interesting... I'd be interested in this as well.
Sent from my Galaxy Nexus using Tapatalk

+1 this would be great!

Agreed, awesomeness would ensue.
Sent from my Galaxy Nexus using Tapatalk

the developer behind it for the htc Inc was chad0989
. he made the incredikernels and the incredicontrol app. tried to use incredicontrol app just for fast charging but didnt work since the kernel doesnt support HAVS or SVS. Im on Francos btw

Imoseyon said once any speed charges were done by taking code out that slows it. Nexus doesn't have it in kernel now according to him so not likely.
Sent from my Galaxy Nexus using xda premium

cricketsmoke said:
Imoseyon said once any speed charges were done by taking code out that slows it. Nexus doesn't have it in kernel now according to him so not likely.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Would there be a way to selectively trigger AC mode as opposed to USB mode?

just asked this in the IRC chan and few devs said doing this could mess up your computer system. point of the hack would be to trick the cheap car chargers into giving u the full charge, not the computer.

droidkevlar said:
just asked this in the IRC chan and few devs said doing this could mess up your computer system. point of the hack would be to trick the cheap car chargers into giving u the full charge, not the computer.
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hmm well i know chad did it and no one that has ever used it had a problem. my computer is fine and so was my phone. il send him a pm and see if he responds

sent him a pm

is it possible to take apart his incredicontrol apk and see how it works that way? its in the market

droidkevlar said:
just asked this in the IRC chan and few devs said doing this could mess up your computer system. point of the hack would be to trick the cheap car chargers into giving u the full charge, not the computer.
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Click to collapse
Not many motherboards have USB ports capable of supplying current in excess of the spec 500mA.
Research modding your (car?) Charger to be detected as AC charger instead of USB.
Sent from my Nexus Prime.

What about a mod that allows the 3 pogo pins to receive more than 500mA(recognized as USB)? That seems ridiculously low and is far more relevant/needed. If you want to charge through the pogo pins you are just SOL.

Moved to General.

morfic said:
Not many motherboards have USB ports capable of supplying current in excess of the spec 500mA.
Research modding your (car?) Charger to be detected as AC charger instead of USB.
Sent from my Nexus Prime.
Click to expand...
Click to collapse
I haven't seen a device that can't do 1A over USB in like a decade.
Hell, even non-PCs have no problems with it. I've done it off a Wii before just for fun.
A lot of newer motherboards can even do 2A over USB (to charge iPads). Most ASUS boards in the past 2-3 years have this as an advertised feature (asus ai charger).

Very interested in this actually. Not so much for USB/AC charging on a computer, but for MHL AC charging.
With the current MHL adapters (even when plugged into an AC outlet), the Gnex reports USB charging. To make maters worse, the screen does not shut off on the Gnex. After an hour or two your battery will die. 500ma is just not enough.
The MHL spec says that 500ma is the charging spec. However, I tweeted with Tim Wong:
http://twitter.com/WongTim
He is the president of the MHL association and he said 500MA is the minimum, not the maximum. My quess is that the Gnex won't try to draw more than 500MA since the data pins can't be shorted on the MHL connector.
I think the MHL adapter will provide for more current, just like most laptops and desktops.
With this mod, it would be nice to tell the Gnex to AC charge. Tim suggest that the phone should not draw more than safely required so long as the voltage doesn't drop on the MHL adapter/MHL tv.
I think the Gnex, by design looks for the shorted data pins and doesn't try to push the envelope as far as monitoring the voltage drop on a USB detected power source.

I recall reading about some smoking/dead phones from fast charging mods. Thanks but no thanks.

sruel3216 said:
Hello I was wondering if there is a mod to have usb fast charge when plugged into the comp. I just came from a Inc and there was a mod flashable through cwm. it was very nice. it charged the phone just as fast as an outlet, if not faster. is there a mod?
thanks
Click to expand...
Click to collapse
I came at this problem from a different angle and accidentally found a solution for you. I have an iPad and it wouldnt charge from my PC so did some research and came up with this:
http://event.asus.com/mb/2010/ai_charger/
Its a free driver from asus that increases the max amp on USB bus. Supports most mobos and works awesome on my PC and dell laptop, I can now charge the iPad on there.
It also has the benefit of fast charging of my Nexus. Double win.
EDIT: Ignore the ****ty site design, it looks terrible but does as it says

TheBishopOfSoho said:
I came at this problem from a different angle and accidentally found a solution for you. I have an iPad and it wouldnt charge from my PC so did some research and came up with this:
http://event.asus.com/mb/2010/ai_charger/
Its a free driver from asus that increases the max amp on USB bus. Supports most mobos and works awesome on my PC and dell laptop, I can now charge the iPad on there.
It also has the benefit of fast charging of my Nexus. Double win.
EDIT: Ignore the ****ty site design, it looks terrible but does as it says
Click to expand...
Click to collapse
Just installed and will give it a go. Wish me luck people.
Edit: Didn't work for me. Same charging speed with and without it.

Here is a pm back from chad:
I'll look into it and see if I can come up with something for the gnex also. I do not plan to release a kernel, but possibly I could provide a patch.
Can you get me a kmsg (/proc/kmsg) while you plug your phone into an AC source, and then a USB source?
adb shell "cat /proc/kmsg"
Also a log of the power draw while connected to USB and to AC
Thanks

Longer MicroUSB charging cable

The microUSB cable is too short, and need a longer one. Will any of the long ones that pop up on ebay work fine or does it need to be a specific type of cable or something.
http://www.ebay.com/itm/3M-long-Mic...Accessories&hash=item231ed566ca#ht_2678wt_958
http://www.ebay.com/itm/Cellet-8ft-...Accessories&hash=item48461ce9f3#ht_1700wt_952
http://www.ebay.com/itm/3M-long-Mic...Accessories&hash=item231fb19fec#ht_2697wt_958
etc

http://www.monoprice.com/products/p...=10303&cs_id=1030307&p_id=5460&seq=1&format=2
Cheap and quality! Especially for 15ft. They have smaller lengths if that's too long for you....

art0605 said:
http://www.monoprice.com/products/p...=10303&cs_id=1030307&p_id=5460&seq=1&format=2
Cheap and quality! Especially for 15ft. They have smaller lengths if that's too long for you....
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Click to collapse
Wow that's a great find.
Working well for you I assume?
Sent from my SPH-L710 using Tapatalk 2

fergie716 said:
Wow that's a great find.
Working well for you I assume?
Sent from my SPH-L710 using Tapatalk 2
Click to expand...
Click to collapse
Absolutely! I got the 6ft ones with ferrite cores. But I am sure the 15ft ones are the same thing.

Longer cable cause greater power loss
i bought a kindle3 last year, and the cable is very long. When i use it to connect my phone to USB port on laptop, my phone can't be recognized

The one that came with the phone was to long for me. I switched to the one that came with my one x. I use the one x charger to it looks better made
Sent from my SAMSUNG-SGH-I747 using xda premium

bigdipper said:
Longer cable cause greater power loss
i bought a kindle3 last year, and the cable is very long. When i use it to connect my phone to USB port on laptop, my phone can't be recognized
Click to expand...
Click to collapse
That is just a faulty cable.

Perhaps you can use an existing USB cable?
I've plenty of these from my past units - I find Nokia cables very well made
My N8 USB cable have locking clasps at the micro-USB side and works pretty well for fast charging
For longer cable needs I bring with me the charging cable of my Logitech K800 wireless keyboard
Great quality USB cable for charging and connecting to KIES or just plain transferring files

I have one white original for my kindle, but using it with gs3 charger, as it's twice as long...
Sent from my Galaxy SIII

I always look to monoprice.com for cables. You are guaranteed to get a high quality cable. You can get one shipped for maybe $1 more than those ebay cables.

Huge +1000 on Monoprice cables. They also have USB AC & Car power adapters. Super easy to stock up on extra cables & chargers.

Beknatok said:
Huge +1000 on Monoprice cables. They also have USB AC & Car power adapters. Super easy to stock up on extra cables & chargers.
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Click to collapse
Never heard of Monoprice, I'll check them out. thanks

can you guys get the monoprice cables to work with the AC adapter?

actng said:
can you guys get the monoprice cables to work with the AC adapter?
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That's the whole point, to make the cable that came with the charger longer. That way one can lay in bed, charge, and use the phone at the same time.

SamsungVibrant said:
That's the whole point, to make the cable that came with the charger longer. That way one can lay in bed, charge, and use the phone at the same time.
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Yeah, I just wish (KICKSTARTER!) that someone made a microusb cable that didn't protrude so much from the end of the phone, making it a pain to hold comfortably in landscape mode. Even the right-angle microusb cables I have aren't good enough.
Somebody should really make one that sits flush against the phone, with some extra silicone padding along the base, so you can't even really tell that it's plugged in. It'd be a little pricier, being niche, but I'd buy it... and if marketed right, lots of others would too.

SamsungVibrant said:
That's the whole point, to make the cable that came with the charger longer. That way one can lay in bed, charge, and use the phone at the same time.
Click to expand...
Click to collapse
so the length doesn't affect charging performance?

Do longer cables negatively impact charging?
actng said:
so the length doesn't affect charging performance?
Click to expand...
Click to collapse
Good question, I don't know. Maybe someone else can chime in.
I can't decide between 6, 10 and 15 ft.
I was going to get the 15 ft until someone else mentioned the longer cables affect charging performance. I don't know if there is any truth to that.
Can someone who knows chime in please

I just bought two 15ft cables on monoprice for two bucks a pop. There's a lot of positive reviews, so my guess is that it works just fine
Sent from my SPH-L710 using xda premium

Totally off-topic but for everybody that buys cables from Monoprice, do you guys have free shipping code or something?
I know their products and prices are good. But it seems like unless I'm buying a lot of cables, the shipping doesn't justify the cost.

Charging isn't an issue over 6 feet, but if you're using it for data, don't go over 6 feet...
This is what I use. No issues.
Mediabridge - USB 2.0 A-Male to Micro-B Cable (6 Feet)

Dual USB Car Charger

I'm in the market for a Dual USB Car Charger; there's a million out there anybody have any words of which ones to avoid and which ones are great for any particular reason?

I have this http://www.ebay.com/itm/Mini-USB-Du...r-Adapter-iPod-Touch-iPhone-3-4-/320861775339
Let me tell you, the quality is really great. Its firm and tiny, plug it in the cigarette port and it doesnt even look like its there. Doesnt stick out. Its belkin brand, i can upload pictures later to show you how tiny it is which is good.
Sent from my SGH-T999

That one looks nice, but does it (or others that people post) do 1a output on each port at the same port? Many spilt the output to .5a each when 2 devices are plugged in and that's just not enough.

Yes. Its 2.1. It splits in half. 1.5 each port
Sent from my SGH-T999

Got one of these on E-bay last year, works a treat :
http://www.scosche.com/consumer-tech/product/1921

if your looking to charge a phone this is a good device and price
http://www.amazon.com/MicroUSB-Car-...TF8&colid=3W2KXC0F6IGLS&coliid=I3E288G8JCCDIX
I can only charger phones on this though so if you need to charge a non phone device you may want to look at another charger.

Xcor3 said:
Yes. Its 2.1. It splits in half. 1.5 each port
Sent from my SGH-T999
Click to expand...
Click to collapse
Not sure i understand your response. If i have 2 devices plugged in, what does each get?

lexluthor said:
Not sure i understand your response. If i have 2 devices plugged in, what does each get?
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Click to collapse
I'm not 100% sure but the max the whole unit can dobis 2.1 amps. So you will get about 1.05 amps per Usb port if you have two devices plugged in. Of course your device limits the amount of current it takes in.....
If you need something to compare it to, one Usb port on this cigarette socket charger should be as good as the stock samsung wall charger.
I just ordered two of these myself.

lexluthor said:
Not sure i understand your response. If i have 2 devices plugged in, what does each get?
Click to expand...
Click to collapse
If you have 2 devices plugged, each will get 1.5. I'm not sure about just 1 plugged in, i haven't really looked into it. I just know it works great, 1 or 2 devices plugged in
Sent from my SGH-T999

The Scosche one in my earlier post can simultaneously supply 2.1 A to a tablet / Sat-Nav or second phone etc and 1 A to a phone. It has dedicated ports for both which are clearly marked. You can of course use the 2.1 A for a second phone if required and it will supply only what the phone will take. :good:

Xcor3 said:
If you have 2 devices plugged, each will get 1.5. I'm not sure about just 1 plugged in, i haven't really looked into it. I just know it works great, 1 or 2 devices plugged in
Sent from my SGH-T999
Click to expand...
Click to collapse
Are you sure? The auction wording doesn't really make it clear. Having dedicated ports in a dual charger at that price would be somewhat uncommon.

Xcor3 said:
If you have 2 devices plugged, each will get 1.5. I'm not sure about just 1 plugged in, i haven't really looked into it. I just know it works great, 1 or 2 devices plugged in
Sent from my SGH-T999
Click to expand...
Click to collapse
so you are saying it is magic?
2.1 total, means it could output 1.05 MAX to each, not 1.5
also, to pull more than .5 amps it needs special internal wiring to tell the phone it is ok, and that wiring is different than what an iphone uses.
I bet you are pulling .5 amps on each, and do not have a full understanding of the device.

just walk to the closest Verizon Store and ask for the dual USB car charger the output is 1a per slot @ $19.99.
there's better deals online but i truly hate to wait a week for my item to arrived
Sent from my Galaxy S3

scarrmrcc said:
so you are saying it is magic?
2.1 total, means it could output 1.05 MAX to each, not 1.5
also, to pull more than .5 amps it needs special internal wiring to tell the phone it is ok, and that wiring is different than what an iphone uses.
I bet you are pulling .5 amps on each, and do not have a full understanding of the device.
Click to expand...
Click to collapse
I meant 1a each. It makes sense what you are saying. I just have others that seemed to have claimed that yet if I charge 2 phones at the same time, neither one gets enough power to charge.
I had $.50 ebay bucks expiring, so I'll just order this for $2.95 and hope for the best.

Xcor3 said:
I have this http://www.ebay.com/itm/Mini-USB-Du...r-Adapter-iPod-Touch-iPhone-3-4-/320861775339
Let me tell you, the quality is really great. Its firm and tiny, plug it in the cigarette port and it doesnt even look like its there. Doesnt stick out. Its belkin brand, i can upload pictures later to show you how tiny it is which is good.
Sent from my SGH-T999
Click to expand...
Click to collapse
I bought two of these and I just got both of them. Really quick shipping as it comes out of NJ. I have not yet used them but when I do I will post back with how it is.
I gotta say it is really small and it should be flush once installed.

I would make sure each port has the dedicated amount of power needed for each device individually, if the overall power is split between the two it could be possible for one device to draw the MAX power of the charger, if theres a fault in the phone this could happen, correct me if im wrong but genuine SINGLE chargers limit the power needed by the charging device, im not sure if the device itself can limit the power entering it
Devices will only draw whatever power is needed for them to charge, so if the overall power of the charger is reached due to two devices connected, the devices will TRY to draw what they need, this can damage the charger itself over time, and if theres a fault in the phone itself it can draw more than it needs because the charger can provide double whats needed
Sent from my amazing Samsung I9300 using XDA premium

I picked up one of these: http://www.ebay.com/itm/261075648343
Basic DC/DC Buck converter.. give it switched 12V behind the dash somewhere and mount the USB port.. no wasting the 12V accessory port.. and can close the ashtray then...
I use it to provide power to my dock in the car.. (infuse dock).. works great and looks stock.
I also have a griffin powerjolt that I can use between cars.. one port is 2.1A and the other is 1A

DarkManX4lf said:
I bought two of these and I just got both of them. Really quick shipping as it comes out of NJ. I have not yet used them but when I do I will post back with how it is.
I gotta say it is really small and it should be flush once installed.
Click to expand...
Click to collapse
I have had experience with this charger and here is some info (saying it si the griffin one they picture, and not some cheap knockoff... notice it even says griffon in the pic):
it WILL charge an S3, and an S2 at the same time (neither were navigating though...)
if you want to switch it to AC (fast charge) mode, you need to either:
a. open the case, and wire the data pins together
or
b. have a charging cable that has those pins already wired togther.
that is how you fast charge with this device. good piece of kit though, i would recommend to anyone.

Review
crabapples said:
I'm in the market for a Dual USB Car Charger; there's a million out there anybody have any words of which ones to avoid and which ones are great for any particular reason?
Click to expand...
Click to collapse
Hi,
Can you please show me your best charger you are offering. I am also looking for charger for my car.

DonnaBB01 said:
Hi,
Can you please show me your best charger you are offering. I am also looking for charger for my car.
Click to expand...
Click to collapse
I have this one.
Volmate® Certified by Apple 6.3A / 31.5W Tri-USB Port Car Charger -... http://www.amazon.com/dp/B00LIE9VR0/ref=cm_sw_r_udp_awd_Smgfub0TNYKC0
I got it for free, but when it was on sale it was for $10.98
Check out slickdeals and car chargers pop up. I have the ZL 7000mAh battery and the charger can keep up and charges my phone perfectly.
EDIT: At the time of this post 9-13-2014 @ 2119 EST This is a deal atm
http://slickdeals.net/f/7197660-2-port-iottie-rapidvolt-5a-usb-car-charger-white-or-black-7-50