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I woke up this morning and the battery of my Atrix was completely dead. Since I was in a hurry to get to work I thought I'm going to charge using the computer in my office with the supplied USB cable.
It appears that the phone won't charge from 0% turned off! I had to borrow a Blackberry wall charger from a college and jump start the Atrix before plugging it to my computer's USB and start charging.
My iPhone 3GS would come back to life if plugged to the USB port after a complete discharge.
Is there a solution for the Atrix? Are there other android devices you know of with the same issue?
Thank you
my milestone also have this prob
The moto wall chargers run at 800+ma. This is more than the usual ~400-600ma that other chargers run at. Computer USB ports only supply 500ma MAX. The atrix doesn't seem to like anything under ~600ma and prefers 800-1000ma for some weird reason.
If you've got a well powered USB port, it will charge the phone. If it's underpowered, the phone won't even take the charge.
Yes, from a dead batt, the phone wont even wake up the charge circuit for anything under 600ma. I've experienced it as well.
Thank you. What about USB 3.0? I have that in my home PC. But it still sucks how I can't wake up the phone if the battery completely drained with all the USB around me at work or wherever when a wall-charger is not within reach.
Shouldn't the phone preserve the last drops of the battery before shutting down so it allows us time to start it up again and charge by USB 2.0?
I think it wouldn't hurt if Motorola made it shutoff at like 2% allowing us to charge the device and get it up using USB 2.0. Or maybe a dev can get around it as an optional tweak for users?!
That also made me think of something else. Would the alarm go off if the battery completely died while you were asleep? I know iphone, Nokia and probably many other smartphones does that (preserving last drops for this purpose).
all usb has the same voltage specs, 3.0 ports wont charge better than 2.0 ports on the same system, the only thing that will make a difference is the build quality of the hardware and the voltage regulation from the power management.
A powered usb hub would be your best bet if you can't get to a moto charger
diedemus said:
all usb has the same voltage specs, 3.0 ports wont charge better than 2.0 ports on the same system, the only thing that will make a difference is the build quality of the hardware and the voltage regulation from the power management.
A powered usb hub would be your best bet if you can't get to a moto charger
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Click to collapse
I thought it's better to bring up this thread instead of opening a new one since I've been investigating the same issue.
We all know that Android phones and widgets especially can drain the battery unexpectedly.
I PM'ed kennethpenn if there's a way to automate a shutdown when the battery reaches a certain level so it can charge and wake up connected to a computer USB 2.0 port (As in if it can be implemented in his ROM). Kenneth replied that he's not sure, and I've been looking for an app that can do that.
Now before we go more on that, I wish to have your opinion on how important you think it is to sacrifice the last little drops of the battery in favor of being to charge/wake up your devices when you're on the go and may not have access to wall charger?
If there's an app that can allow it then I'm welling to do the tests and find the sweet spot of when to shutdown and if it would actually charge to wake up.
Thank you
I had the same problem yesterday, I only have the USB cord with me and I thought my phone was dead for real or defective. Thanks god for XDA ... The user manual did not say anything about computer usb power not being powerfull enough.
CyberPunk7t9, there is (a few) threads dedicated to improving Atrix battery life full of usefull tricks. I did not try it yet, but SetCPU might be of a great help too.
Remeber, the Atrix requires the Motorola usb drivers to be installed to charge the phone off a port. If the phone is off, your computer is not reconigizing that it was plugged in, so the drivers do not start. *I could be wrong* Happen to me last night though
it's a hardware issue on the computer side. without the moto drivers there telling the USB port to up the current coming out, your phone won't charge on it. most computer-based USB ports do not run high current for power purposes unless enabled. it cannot be solved with an app and mandating a shutdown at 2% is most likely going to cause more problems than solve. the solution is to not run your battery down, honestly. you shouldn't be for LiPo batteries anyway.
diedemus said:
all usb has the same voltage specs, 3.0 ports wont charge better than 2.0 ports on the same system, the only thing that will make a difference is the build quality of the hardware and the voltage regulation from the power management
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Click to collapse
It's not voltage that matters, it's current.
I have a gigabyte board which has 'rapid charge' technology, meaning it supplies extra amperage to the usb ports...my battery was close to dying when I saw this thread so as a test I let it completely die and then I tried charging from usb.
Result: It worked.
I still don't get as quick of a charge from USB as I do from the wall but at least there is enough amperage to charge from a completely dead state.
diedemus said:
all usb has the same voltage specs, 3.0 ports wont charge better than 2.0 ports on the same system, the only thing that will make a difference is the build quality of the hardware and the voltage regulation from the power management.
A powered usb hub would be your best bet if you can't get to a moto charger
Click to expand...
Click to collapse
Get your facts straight!..............USB 3.0 IS a powered USB port!
USB 3.0 will charge more devices, quicker
Not only will USB 3.0 cables facilitate faster transfer speeds, but they’ll carry more power, too. The USB-IF recognizes the growing number of portable devices that charge via USB (cellphones, MP3 players, digital cameras), and have bumped the power output from about 100miliamps to 900 milliamps. That means not only will you be able to power more than 4 devices from a single hub, but the increase current will let you charge up heftier hardware as well.
Maximum PC
<edit> Also, my Atrix charges fine off the 3.0 ports on my HP laptop.
dcarpenter85 said:
I have a gigabyte board which has 'rapid charge' technology, meaning it supplies extra amperage to the usb ports...my battery was close to dying when I saw this thread so as a test I let it completely die and then I tried charging from usb.
Result: It worked.
I still don't get as quick of a charge from USB as I do from the wall but at least there is enough amperage to charge from a completely dead state.
Click to expand...
Click to collapse
I have a gigabyte UD7 in my PC. I wanted to use the rapid charge feature for a while. Still planned. Also the On/Off Charge feature to charge the iphone/ipod while the computer is turned off. I will probably assign some time to test those tomorrow.
CaelanT said:
Get your facts straight!..............USB 3.0 IS a powered USB port!
USB 3.0 will charge more devices, quicker
Not only will USB 3.0 cables facilitate faster transfer speeds, but they’ll carry more power, too. The USB-IF recognizes the growing number of portable devices that charge via USB (cellphones, MP3 players, digital cameras), and have bumped the power output from about 100miliamps to 900 milliamps. That means not only will you be able to power more than 4 devices from a single hub, but the increase current will let you charge up heftier hardware as well.
Maximum PC
<edit> Also, my Atrix charges fine off the 3.0 ports on my HP laptop.
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Click to collapse
I have USB 3.0 in my PC too. But as someone stated here, USB 3.0 does not provide more voltage than USB 2.0. Just more consistency I think.
But what matters, Can any of those solutions charge and start a completely dead Atrix?
Thank you for participating guys.
USB ports can only source 100mA unless the host and client agree to a higher current. If as mentioned the Atrix needs more then this to wake-up the phone with a dead battery then it can never request the higher current. This is also why the Moto drivers need to be installed to get the higher current.
CyberPunk7t9 said:
I have USB 3.0 in my PC too. But as someone stated here, USB 3.0 does not provide more voltage than USB 2.0. Just more consistency I think.
But what matters, Can any of those solutions charge and start a completely dead Atrix?
Thank you for participating guys.
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Click to collapse
you need a port or power source that will supply enough current to the phone. period. if your computer's ports don't do it, it won't work. go find a higher amp USB port.
Maybe try the usb 2 to 1 cable? So you plug it into 2 usb ports and than into the atrix
CaelanT said:
Not only will USB 3.0 cables facilitate faster transfer speeds, but they’ll carry more power, too. The USB-IF recognizes the growing number of portable devices that charge via USB (cellphones, MP3 players, digital cameras), and have bumped the power output from about 100miliamps to 900 milliamps.
Click to expand...
Click to collapse
Actually USB 2.0 can supply 500 mA, but as someone said to get more than 100 mA, the host and device have to 'negotiate' which I think means driver support of some kind.
I have noticed in Device Manager says that my SGS plugged into my laptop as a mass storage device is only taking 100 mA, but it doesn't charge much slower than it does from a wall charger (which is actually pretty slow, almost 3 hrs for a full charge). Still if I do the math to charge 1500 mAh at 3.7V with 5v in 3 hours would take about 370 mA (assuming 100% efficiency, so the actual current draw must be higher).
If anyone knows a more accurate way of determining the current a USB port is supplying, since Device Manager seems to be wrong, that would be interesting information.
What's interesting here is that at 0% the device isn't even on and can't power up to negotiate a higher current draw. If it can't turn on with 100 mA from the charging port it's stuck, which I suspect is the problem here with the Atrix.
USB 3.0 has the potential to charge at 900mah but yes it’s still 5vdc, the phone will not pull more than 500mah unless it detects the data lines are bridged. This is a safety feature so it doesn't blow your usb2.0 ports as the phone wasn’t built with usb 3.0 spec in mind. If you have a 3.0 usb port you can make a fast charge cable with the data lines cut and bridged, make sure you cut them and they aren't still connected to the host side or you might kill your port.
callen81 said:
USB 3.0 has the potential to charge at 900mah but yes it’s still 5vdc, the phone will not pull more than 500mah unless it detects the data lines are bridged. This is a safety feature so it doesn't blow your usb2.0 ports as the phone wasn’t built with usb 3.0 spec in mind. If you have a 3.0 usb port you can make a fast charge cable with the data lines cut and bridged, make sure you cut them and they aren't still connected to the host side or you might kill your port.
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mA, not mAh
dLo GSR said:
mA, not mAh
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Click to collapse
I'm so used to talking about batteries I guess I left the "h"ours in, haha.
I can't figure this phone out with regard to charging.
1) Won't charge via computer USB (I've heard the reasoning for this - still seems stupid)
2) Charging w/ 1amp 5V wall charger - phone screen is non responsive to touch, but phone charges (unplugging it unfreezes the screen)
3) 1amp accessory USB charger, won't charge the phone at all.
Are the charging limitations software or hardware based. I can't come to terms with the fact that this phone can't at least charge by USB. It doesn't need to be lightening fast, but it should at least charge.
Is there anything that can be done?
are u using OEM charger and USB cable ?
charging by USB
My phone charges with just the USB cord and a PC, It is a bit slow to charge that way, but it charges. Are you sure you are using a powered USB port?
it will charge via USB, you just need to install the motorola drivers. it needs more current than the original USB standards allowed for. USB can provide that current now, but you need the drivers.
Not OEM
None of the above are OEM chargers and the cables are no OEM either (Wouldn't think the cable has anything to do with it).
Since i am out and about a bit, i have to have a portable battery powered backup charger, i also carry a wall/car charger that is capable of doing both at the same time.
cable has nothing to do with it. The power requirements are strict for this phone, and it's all down to the proper way to charge the battery.
I know for a fact that the generic energizer car charger i picked up with interchangeable ends for different USB types works perfectly for this phone. It might be worth it to just jump on ebay and grab another OEM battery instead of trying to run around with chargers.
have you measured the output of those 1a chargers? i have an adapter from china that says 1a but only puts out 0.3a and doesnt charge my atrix either.
I am still using the chargers I had from my blackberry 8900. The bb wall charger works great. The car charger (att) with the flip cover over a usb makes my phone hot as hell but it still charges.
Think i've also found that, once you have the motorola drivers installed on your computer, disabling the data connection to the phone (as in selecting "None" for the USB connection option in the notification pane after you connect the phone) seems to allow the phone to charge a fair bit faster over USB. Kinda makes sense too when you're thinking about it... since it wouldn't be constantly accessing the phone as a storage device.
Yes some wall chargers dont work i.e. the two I had from my Nexus One, BB chargers seem to work well as I believe they needed more juice to charge in the first place, for the usb cable, the best solution to try is getting the updated usb drivers as mentioned.
I went out of town this week and made sure to grab my USB cable, but left the AC adapter at home figuring I'd just charge off my laptop via usb. Apparently not... I also tried plugging the USB cord into my iPhone AC/usb adapter with no luck. The only thing I've found is that when you turn off the Tab and connect to one of these devices, a green battery indicator will pop up showing that it is charging. Well, after about 16 hours, it made it from 15% all the way up to 48%. Does anyone know any way around turning it off to charge or why it is barely charging when it is off?
Jaydawgx7 said:
I went out of town this week and made sure to grab my USB cable, but left the AC adapter at home figuring I'd just charge off my laptop via usb. Apparently not... I also tried plugging the USB cord into my iPhone AC/usb adapter with no luck. The only thing I've found is that when you turn off the Tab and connect to one of these devices, a green battery indicator will pop up showing that it is charging. Well, after about 16 hours, it made it from 15% all the way up to 48%. Does anyone know any way around turning it off to charge or why it is barely charging when it is off?
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Click to collapse
Well seeing as it has a 7000mAh battery, just about any run-of-the-mill USB charger isn't going to cut it. The amperage would have higher as well. Now i would hazard that an iPad charger (10 watts) would probably work just fine vs an iPod charger.
Your laptop's USB port isn't providing enough juice to charge fully. With the screen off it will only trickle charge and very slowly at that.
You'll need at least 5 Volt 2 Amp chargers.
You can also try this:
http://forum.xda-developers.com/showpost.php?p=14890063&postcount=16
Or this:
http://cgi.ebay.com/190522553195?ru...ee-All-Categories&_fvi=1&_rdc=1#ht_3085wt_905
I've ordered both last week but neither have arrived yet. I'll report back.
You need a 5vdc supply that will provide 2A. 10W, not 5w as the previous post said. That adapter on ebay won't help the charge, it just disconnects the data line so it does not change its mode when connected to a computer. There are a lot of power supplies that will work and even more that won't, just made sure it supplies 2a. If you want to charge off your laptop then you will want a Y adapter similar to what is on usb powered hard drives but even then you will need to use 2 usb 2.0 or 3.0 ports and will provably only get 1a out.
Sent from my GT-P7510 using XDA Premium App
I have TPT for 10 days now.
I have usual iisue with USB charging. When used like standard smartphone = put it to charger overnight. Not usable anyway. Charge rate about 5% per hour, which means 20 hours per full charge???
I even consulted it with local technical support. I was adviced to buy docking station with external power adapter .....
So ... I took regulated power supply, made a USB socket connected to it and started to measure
.. and look what I found
When device is switched on, usb power oscilates sligthly under 1000 mA. It is NOT using all available power of 2 Amps of stock power adapter!!!!!
But ... when I power the device off using power button. The current goes down to 300mA for about 5seconds and then raises to full 2 A!
Conclusion? It seems like control issue of the charging ciurcits. What if we can enable full 2A power even when turned on? SW issue?
Is there any chance, how to instruct internal power circuity to use all available power? ADB?
Well I guess that explains the slow charging that people have been reporting. I picked up a dock for my tablet from amazon for about $30 shipped. Now I just put my USB charger in my bag for when I am out and about and dock it when I get home. That being said when I was charging via USB before I had the dock, a full charge seemed to take about 6 hours or so.
As for your question regarding modifying the input charging rate while powered on, I am not sure that can be done via ADB. I am taking a stab in the dark here, but I wouldn't be surprised if the charging rate was hard coded into the power circuit. Which would make some sense so as not to draw to much power if someone wanted to try and charge their tablet while having it plugged into a laptop or USB hub. I am not sure if it has an auto sense capability to determine whether or not it is charging via USB from a port or from the power adapter. I do know when I hook it up to my computer to transfer files it offers me the option to charge via USB, but I think that is a software thing and not hardware. I could be wrong. Maybe if we had access to the board schematics I could figure out. I can read schematics and might be able to figure it out.
Any chance you could get a proper reading via the docking port on the tablet? I would be curious to see if it is always at 2A. I haven't counted the pins but I don't see why you would need more than VCC+, VCC-, GND and maybe a sense line. But I know there are more than 4 pins.
Sent from my ThinkPad Tablet using xda premium
I would say this is a SW issue. Maybe if we had the kernel source code someone could cook up a custom kernel with that control feature tweeked.
Temetka said:
~
Any chance you could get a proper reading via the docking port on the tablet? I would be curious to see if it is always at 2A. I haven't counted the pins but I don't see why you would need more than VCC+, VCC-, GND and maybe a sense line. But I know there are more than 4 pins.
~
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Click to collapse
The best thing to use is a watt meter if anyone wants to pursue this.
My findings indicated that the dock has a similar issue as the USB charger when the TPT is on.
Maximum current allowed at the dock connector was measured at just over 1A . Dock should charge the battery at a maximum rate of just over 1% per minute provided the battery charge level is below 70%. So if you discharge the battery to around 50% and compare charge rates you should see the difference between TPT on/off.
I figured I would share this since I have not found another thread with this info.
The Galaxy Note 10.1 will charge from usb.
I find this interesting because no tablet, at least none I have known, will do this. They all need to be actually plugged into a wall outlet to charge. However, my note 10.1 has charged from around 13% to 32% plugged into USB. Now, mind you , it doesnt charge very fast, but it does charge.
For some this won't matter. In my case, that 3 ft cord doesnt go from the floor outlet to my desk at work too easily, but the usb will plug in very easily and reach where I need it too. At the very least, it will add a little more time to the length of the batter. I work a 10 hour shift, not adding in the hour for lunch, and I can usually made it about 8 hours. So this may get me the extra two hours I need...hopefully.
phoenixbennu said:
I figured I would share this since I have not found another thread with this info.
The Galaxy Note 10.1 will charge from usb.
I find this interesting because no tablet, at least none I have known, will do this. They all need to be actually plugged into a wall outlet to charge. However, my note 10.1 has charged from around 13% to 32% plugged into USB. Now, mind you , it doesnt charge very fast, but it does charge.
For some this won't matter. In my case, that 3 ft cord doesnt go from the floor outlet to my desk at work too easily, but the usb will plug in very easily and reach where I need it too. At the very least, it will add a little more time to the length of the batter. I work a 10 hour shift, not adding in the hour for lunch, and I can usually made it about 8 hours. So this may get me the extra two hours I need...hopefully.
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Click to collapse
Hmm, I think mine claims not to (it puts an X on the battery icon), but I didn't leave it plugged into my computer long enough to see whether it charged or not. I think all tablets can potentially charge via USB port on a PC, it's just that most disable it out of the box but eg. for the Galaxy Tab 10.1 custom kernels could enable charging over USB.
iofthestorm said:
Hmm, I think mine claims not to (it puts an X on the battery icon), but I didn't leave it plugged into my computer long enough to see whether it charged or not. I think all tablets can potentially charge via USB port on a PC, it's just that most disable it out of the box but eg. for the Galaxy Tab 10.1 custom kernels could enable charging over USB.
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Click to collapse
Mine also puts the RED X over the battery icon whether I try to charge it through a PC USB port or other USB charging port other than the Samsung adapter (Goal Zero 150 usb port and Panatech 10000mah external USB battery pack). The tablet shows that it is charging when i view it using GO POWER MASTER app. Watched it for 5 minutes but with WIFI off, it still dropped from 88% to 87%. I am however using the stock kernel.
It charges faster if you have the screen off. The usb gives more or less what you need to keep it running with the screen on.
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Mine put the red X on the battery icon as well, but still charged. I had to have the screen off.
I had mind plugged into my USB 3.0 port (which should really make a difference) to transfer some files, and then just left it plugged in and it charges. Its definitely a trickle charge, but I am glad to see it does this, as my a500 did not.
When I transferred 40Gb of data to the mSD via MTP (screen off) and called up the batt-graph after disconnection it showed me a fair charging rate. Not stunning but at least a noticeable charge ( from 63% to 82% in three hours).
So it does charge the battery, in spite of the red X?
Yes it does, albeit very slowly.
You guys are misinterpreting the red x. Just got off the phone with Samsung. The x stands for "extra awesome charging". I swear.
Sent from my GT-N8013 using Tapatalk 2
phoenixbennu said:
I figured I would share this since I have not found another thread with this info.
The Galaxy Note 10.1 will charge from usb.
I find this interesting because no tablet, at least none I have known, will do this. They all need to be actually plugged into a wall outlet to charge. However, my note 10.1 has charged from around 13% to 32% plugged into USB. Now, mind you , it doesnt charge very fast, but it does charge.
For some this won't matter. In my case, that 3 ft cord doesnt go from the floor outlet to my desk at work too easily, but the usb will plug in very easily and reach where I need it too. At the very least, it will add a little more time to the length of the batter. I work a 10 hour shift, not adding in the hour for lunch, and I can usually made it about 8 hours. So this may get me the extra two hours I need...hopefully.
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Click to collapse
Interesting, because every tablet I've owned (Tab 10.1 and Nexus 7) behaved like this.
They will charge VERY slowly on USB - and will likely not charge at all if the screen is on due to the total unit power consumption being >500 mA.
Entropy512 said:
Interesting, because every tablet I've owned (Tab 10.1 and Nexus 7) behaved like this.
They will charge VERY slowly on USB - and will likely not charge at all if the screen is on due to the total unit power consumption being >500 mA.
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Click to collapse
Same here. iPads, nook color, Samsung tablets, all say not charging but do trickle charge if you are doing anything to drain it faster than thenusb can supply. It takes around 8 to 10 hours to charge my gt101 through regular USB 2.0.
mitchellvii said:
You guys are misinterpreting the red x. Just got off the phone with Samsung. The x stands for "extra awesome charging". I swear.
Sent from my GT-N8013 using Tapatalk 2
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Click to collapse
Bwahahaha... A friend of mine posted on twitter that Apple should make something that lets iDevices charge each other... Ours actually can because of USB host! I actually lost the usb host adapter for my old galaxy tab so I need to get a new one but I had one for my gs3, and it does charge my tablet. But the reverse is clearly more useful.
Sent from my SCH-I535 using Tapatalk 2
Tested again when attached to Notebook by USB:
Screen on at max. Brightness and working: batt charge stays level
Screen off: batt charges approx. 5% per hour
Tested on GNote charger (1A output)
Screen on : charging very slowly (approx. 3% per hour)
Screen off: charging approx. 8% per hour
Tested on iPad charger:
Slower than original charger although max. Output:
The more items you have attacht to your computers USB the less power it has to allow your tablet to draw for charging.
donec said:
The more items you have attacht to your computers USB the less power it has to allow your tablet to draw for charging.
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Click to collapse
I don't think this is the case. The USB ports provide a set power output, and not variable by available power supply type of output.
phoenixbennu said:
I don't think this is the case. The USB ports provide a set power output, and not variable by available power supply type of output.
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Click to collapse
You are correct they are not variable but they only have a given amount ofpwer available and if you are drawing the max and add another device that needs more power to charge the power will not be available.
donec said:
You are correct they are not variable but they only have a given amount ofpwer available and if you are drawing the max and add another device that needs more power to charge the power will not be available.
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Click to collapse
Of course, everything has a limited power availability, USB ports being no exception, whether having their own psu or bus powered or whatever your setup may be, but unless you are doing something beyond practical use or have a poorly designed setup, than this should not be a problem. I know some systems out there, the mac book pro for example, specific limits USB power output between ports by design (you may even call it variable haha...but by design). However, in a general sense, you should not have a power output issue with simply plugging in for usb charging., even if all other ports are used up as well. So don't daisy chain, or do anything like that. Practical use should be fine. I personally hook my usb charged devices, like my phone, to my monitor at work. It was a few usb ports on the side, and it works great. Also, it keeps me from having to deal with all the annoying security popups that go with plugging it into the actual computer.
In a probably unfunny but still remotely amusing anecdote, I remember the massive work I put my a500 through. I used to have a usb hub attached with 2 1tb portable hard drives, a keyboard, a mouse, my phones, and more all charging directly from USB. Never had trouble with power issues, aside from quicker draining of the battery. lol.
does anyone know if charging is possible when you use an Y adapter on USB-OTG to hook up an external harddrive and a charger at the same time?
cproaudio said:
does anyone know if charging is possible when you use an Y adapter on USB-OTG to hook up an external harddrive and a charger at the same time?
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Click to collapse
Barring any specific device hardware limitations, it is possible to do data transfer and power transfer at the same time using a y cable. Its essentially the same thing as using a usb hub, except you only have two ports instead of 4 or more.
As for actual practical use on the note, I have not tried it out, and I am not aware of any limitations built into software or hardware to prevent it. So, I do not see you having a problem with it.
Almost all tablets can charge through regular USB2 if they're sleeping (or better - powered off).
USB has power limits (USB1.1 is 100mA, USB2.0 is 500mA and USB3 is 2A) BUT these are the 'minimum maximums', if you will. That is, these are the current source *required* for certification. It's entirely permissable for a USB port to provide as much current as it wants - it just can't be limited to *less* than these amounts.
USB 2.0 and later ports are also supposed to implement 'overcurrent' warnings if the device is taking more current than the port can provide..
That's why, for example, some ports can drive a CDROM or external HD drive without a problem - while other ones can't.
The Note 10.1 needs a little over 2A @ 5V to charge at a reasonable rate.
One other note, if you let your battery drain very low, then the lower current of most USB 2 ports won't be enough to charge it even if it's off. The charge current curve isn't linear.