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I picked up this cable at bestbuy last weekend before a camping trip to use in with my usb charger in the car. I got outside and noticed that while using it it showed up as an ac charger. So far, every PC ive used it on recognizes it as an AC adapter and therefor charges at full power. I had seen an earlier thread about a way to accomplish this, and i know it isnt done via a hack, but if you have 20 bucks, you have a solution to the problem.
http://www.bestbuy.com/site/olspage...p=&qp=&list=n&iht=y&usc=All+Categories&ks=960
Just noticed this should prob be put under accessories, but it didn't feel like the right spot for it. Mods, if it belongs there, please move it.
Thanks,
replaced link as links with prices from bestbuy do not seem to work. The item is the usb cable./
Added pics of a standard usb plug charge and the one i mentioned. You can see the grey rocketfish cord shows up as AC
linky no worky.
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wow, it doesn't work for me either, give me a sec and ill look it up another way. It is the Rocketfish usb charger with mini adapter.
There is no difference in charge time between computer usb and wall charger usb.
apristel said:
linky no worky.
Click to expand...
Click to collapse
Try it now, wouldn't let me copy pasta a link straight to the product. Click the link above, and its the second usb cable in the third row...can't miss it. Only downfall is its only 4 ft, but..
Bielinsk said:
There is no difference in charge time between computer usb and wall charger usb.
Click to expand...
Click to collapse
well please disregaurd my post, i was under the impression a standard usb cable plugged into the pc pulled 500mw and while in the ac charger, 1000mw or 1W.
i thought there was a difference in time, because it seems to take all day to charge from pc. charges alot faster from the ac adapter.
Bielinsk said:
There is no difference in charge time between computer usb and wall charger usb.
Click to expand...
Click to collapse
I hate to be the one to break this to you, but you're incorrect. First, a computer's USB port only has to put out 500 mA (that is the spec) - the HTC wall charger puts out 1 A (that's 1000 mA) (EDIT Thought I would add that these are both @ 5 V, so you have 2.5W or 5W of power...Power, current, and voltage are not interchangeable /BSEE lol). Second, the phone can tell when it is charging from the stock charger and when it is charging from a non-OEM 1000 mA charger or a 500 mA charger / USB port (it will say charging via AC or USB on the battery status page in the About Phone page of Settings).
So to the OP what you're saying is, this cable makes the phone think it's charging via it's AC charger? Have a picture? (not a screenshot, a picture of the phone screen showing AC while plugged into this charger).
TorxT3D said:
i thought there was a difference in time, because it seems to take all day to charge from pc. charges alot faster from the ac adapter.
Click to expand...
Click to collapse
It does, i was just being sarcastic. The above mentioned cable will allow you to pull full draw from your usb port on your pc.
phobos512 said:
I hate to be the one to break this to you, but you're incorrect. First, a computer's USB port only has to put out 500 mA (that is the spec) - the HTC wall charger puts out 1 A (that's 1000 mA). Second, the phone can tell when it is charging from the stock charger and when it is charging from a non-OEM 1000 mA charger or a 500 mA charger / USB port (it will say charging via AC or USB on the battery status page in the About Phone page of Settings).
So to the OP what you're saying is, this cable makes the phone think it's charging via it's AC charger? Have a picture? (not a screenshot, a picture of the phone screen showing AC while plugged into this charger).
Click to expand...
Click to collapse
Thanks for that, i try hard not to be a **** to people, but you handled it quite well. I will add a screenie to the front page shortly. I had made a custom cable myself and removed the two inner pins (data+ and -) to achieve this purpose. But keep in mind, when using this usb cable i posted, you can not sync to your pc-it will only charge-hence the fact my battery profile shows ac charger when using it. Give me a little to get to a camera to take a pic of the cable and a pic of the battery profile.
added pics to the first post
Computer USB can only output a certain amount of power, it isn't going to increase power with a cable.
I use Juice Plotter to see exactly what my battery life is, and how long it will take to charge. There is no difference in the charging time between USB and Plugged in.
Now on USB it will take longer because the screen is off and I am normally fustsing with it a lot, where when it is plugged in, I am not touching it at all and normally shut the screen off.
So even if a USB puts out 500mah and a wall charger puts 1000mah, I don't believe the phone has any type of switch to its micro USB to allow it to sense the mAh and adjust the charge. Else I would think your screen shots would show different numbers.
Bielinsk said:
Computer USB can only output a certain amount of power, it isn't going to increase power with a cable.
I use Juice Plotter to see exactly what my battery life is, and how long it will take to charge. There is no difference in the charging time between USB and Plugged in.
Now on USB it will take longer because the screen is off and I am normally fustsing with it a lot, where when it is plugged in, I am not touching it at all and normally shut the screen off.
So even if a USB puts out 500mah and a wall charger puts 1000mah, I don't believe the phone has any type of switch to its micro USB to allow it to sense the mAh and adjust the charge. Else I would think your screen shots would show different numbers.
Click to expand...
Click to collapse
Every windows mobile phone ive ever used could be manipulated to allow the usb port to pull 1000mw. It is a hack and there is work on finding it in the android system. I am hoping this cable bypasses that and if i can find any program that shows charge current, i can know for sure. Android os uses parameters to decide how much current to pull as does windows mobile.
Bielinsk said:
There is no difference in charge time between computer usb and wall charger usb.
Click to expand...
Click to collapse
Then why does my EVO take twice as long to charge when connected to my laptop, smart guy?
-------------
Sent from my HTC EVO 4G using Tapatalk Pro.
Hi
Is it normal, that the paad does not charge while turned on?
Rgds
snudel
update: usb options was set to these crappy sync software and usb debugging enabled.
I've noticed the same here. But only whilst plugged in to a USB or other DC device. It states that it is not being charged... occasionally however it does actually charge, or at least I assume it does as the battery level goes up. More often though it discharges with a DC USB cable plugged in from a pc.
It does charge when turned on and plugged in to the AC (mains) adapter.
Huge battery => USB charging not really effective...that's what I read anyway.
Talking of which:
http://www.ifixit.com/Teardown/Samsung-Galaxy-Tab-Teardown/4103/1
Who wants to reverse-engineer the charging cable/connector ?
daniel.weck said:
Huge battery => USB charging not really effective...that's what I read anyway.
Talking of which:
http://www.ifixit.com/Teardown/Samsung-Galaxy-Tab-Teardown/4103/1
Who wants to reverse-engineer the charging cable/connector ?
Click to expand...
Click to collapse
No need, it's an open standard:
http://en.wikipedia.org/wiki/PDMI
Croak said:
No need, it's an open standard:
http://en.wikipedia.org/wiki/PDMI
Click to expand...
Click to collapse
...with no known compatible product other than Samsung's own connectors / cradles though Talk about interoperability ...
can someone look at the charger that comes with these things?
im guessing it outputs 2 amps, compared to the 1 amp most desktop PC's have available at USB ports.
Croak said:
No need, it's an open standard:
http://en.wikipedia.org/wiki/PDMI
Click to expand...
Click to collapse
Looks like it's not, from that same page:
The Galaxy Tab, a 7" tablet produced by Samsung, does not use this interface. It uses a proprietary physical connector that is similar to the Apple dock connector, but with the contacts inverted. There has been much confusion with early reports assuming that the 30-pin connector referenced on Samsung's specifications for the Galaxy Tab would be PDMI.
Click to expand...
Click to collapse
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
Click to expand...
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
Click to expand...
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.
Click to expand...
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.
Click to expand...
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.
Click to expand...
Click to collapse
mA, not mAh
dLo GSR said:
mA, not mAh
Click to expand...
Click to collapse
I'm so used to talking about batteries I guess I left the "h"ours in, haha.
Hi all, just came 3 days ago from an htc hd2, and so far I am more than happy with it.
I have only one complaint and maybe you guys will help me sharing your experience : I can't charge this phone in my car while using gps.
It seems that the power adapter is not powerful enough to charge the phone screen on.
The car charger has a 5v 1000ma output, more than the regular wall charger provided by Samsung and it was working well before with my HD2 so I have no clue about this problem.
Did you experience that issue too, else can you share what car charger do you use?
try to buy new standard car charger with micro plug.. 13 eur and you will be saved..
Sent from my GT-I9100 using XDA App
Charger doesn't matter unless the phone is dropping into USB charging mode - phone limits to around 600-650 mA by default.
Custom kernels can bump this limit up for I9100 users. I777 users are screwed - we've got a crippled charger chip.
I had the same problem, I used the samsung one, useless, so I used my iPad charger, which is 2A, and charges the iPad quick, still useless. We drove from Bathurst NSW, down to Melbourne, about 10 hour drive, plugged in all the way using GPS, and about an hour from home, the connect to charger warning came on!! So once I stopped GPS, it started taking charge. Looks like when the phone is in use, it draws more then it takes charge, plus I read somewhere on here the phone is limited on the charge it takes, so using the 2A does nothing different then the stock 500mA charger.
I always had this problem with my Nexus One, although they are different phones, the problem is the same, uses more power then it can recharge in USB mode.
After trying 3 or 4 different charges I remember that I found one ultra-cheap 'made in taiwan' from a street seller that worked very well.... so it's kind of a lucky shot!
good luck!
Im using a genuine Samsung SGS2 charger and I can charge and run Sygic just fine. I started my journey with 80% and 40mins later I was up to 91% when I stopped and got out. (not in aeroplane mode..)
Very interesting feedbacks... So that confirm that is clearly not a matter of output amperage power.
It is now the same problem on the galaxy tab 10.1, for quickly charge this tab you need the Samsung compatible usb adapter.
It can be likely with a tab bringing a proprietary plug, but I didn't thought it will be the same with a Samsung phone bringing a regular micro usb plug. Quite frustrating and disappointing!
I will search around a micro plug car charger as suggested by redzion, but actually I don't clearly see the difference with my usb charger + a micro usb cable.
Double post, sorry.
If I use the usb cable from my cd player I have the same problem but if I use the official Samsung car charger Ithe only problem I have is the phone getting stupid hot
Sent from my GT-I9100 using xda premium
Oh Samsung, when you will understand?!
Samsung DOES follow the USB charging standard - it goes to its highest current setting when a charger that follows the standard is connected.
Note that iPad/iPhone chargers do NOT follow the standard - Samsungs will treat these as USB hosts and limit to 450 mA instead of 600-650.
Modified kernels can increase both of these values on I9100s.
The only thing Samsung really did **** up is counting screen/CPU current usage against the charge current limits - that's just stupid.
So the charger has smarts. On the i9000 factory chargers, the data pins were bridged. Bridging these pins manually on a USB cable when connecting to a USB source (such as a PC) enabled full current charging. You can see this in Settings -> About; it will say either USB or AC charging.
Do you think this is the case with the i9100?
I don't condone testing this theory on your i9100. Increasing the max current via custom ROM may be a safer solution.
I had the same problem. Two things fixed it for me:
1) I bought this charger: Sony Ericsson AN300 Micro USB 10€
2) I am using a custom kernel now
Any charger that is rated at 1000mA or more (per port) will do just fine. The problem is the cable - you need a quality microUSB cable, or it won't provide all the juice you need. I had the same issue, and I swapped three chargers until I found the real culprit.
Try with the charger you have now and the mUSB cable that was in the phone box - it should work well with that one.
I just press the power button to turn the screen off. when i need the sat nav i press the power and it still tracks you so there is no delay. With the screen off it does charge.
same problem
Duffman19 said:
I just press the power button to turn the screen off. when i need the sat nav i press the power and it still tracks you so there is no delay. With the screen off it does charge.
Click to expand...
Click to collapse
You are right, but even if it is better than nothing the charging time is still a big problem.
Yesterday I drove for at least 40mn phone off. Arrived to destination, I turn the device on: it charged only from 0 to 5%
I would like to test the mariusi theory concerning the Samsung micro usb cable, unfortunately on my SgsII box I just have a wall charger, no a microusb-usb cable.
Entropy512 said:
Samsung DOES follow the USB charging standard - it goes to its highest current setting when a charger that follows the standard is connected.
Click to expand...
Click to collapse
Is there a way to know before buying if the charger respect this charging standard?
I have some cheap usb chargers here and no one is a fast as the one provided by Samsung.
Entropy512 said:
The only thing Samsung really did **** up is counting screen/CPU current usage against the charge current limits - that's just stupid.
Click to expand...
Click to collapse
Maybe for safety purpose? Gps phones can become very hot behind the car glass.
Samsung are trying to "encourage" you to buy only their official accessories. To do this they've wired something differently in their chargers and cables. This "problem" exists on the Galaxy Tab too and can be solved with this adapter...
http://www.ebay.co.uk/itm/USB-car-w...ccessories&hash=item2c5c07736b#ht_3084wt_1163
It's cheap and turns a trickle charge into a full charge. I don't know the specifics of what they've done, but their USB charging just isn't the same as most others manufacturers.
Archer said:
It's cheap and turns a trickle charge into a full charge. I don't know the specifics of what they've done, but their USB charging just isn't the same as most others manufacturers.
Click to expand...
Click to collapse
Great find.
Pretty sure it just bridges the data pins.
I would like to charge my SGT 7.7 with the normal USB cable it came with on my pc; however, due to its lower mA output (USB standard is 500mA). The standard adapter it came with has 2000mA (2A) output, hence it detects and charges. However, I do notice that the unit charges at 1A with my iPhone charger, perhaps just a bit slower.
Anything we can modify in the rom to enable force usb charging? there is such a way in SGT 10.1 but I can't find a method similar to it on my 7.7
it charges when the device is in a powered off state... but very slowly
onicrom said:
it charges when the device is in a powered off state... but very slowly
Click to expand...
Click to collapse
Yep, it does.
But I would like to keep my device on while charging...
it's very slow because device detect voltage in data line. check out adapter in ebay.
Sent from my GT-P6800 using xda premium
zoftdev said:
it's very slow because device detect voltage in data line. check out adapter in ebay.
Sent from my GT-P6800 using xda premium
Click to expand...
Click to collapse
Yeah understood.
I'm using the Galaxy Nexus USB charger and it works well (1A)
but the iPhone 4S charger does not (also 1A)
kazuni said:
Yep, it does.
But I would like to keep my device on while charging...
Click to expand...
Click to collapse
Mine still charges even with the red X on the battery icon. Albeit, very slowly, and only really when the screen is off. Not bad for just listening to music while I'm at work!
USB charge adapter
To charge your GT7.7 using a usb cable you need to have an adapter.
You can make an adapter from the below parts. See attached images of the end result.
user rick75204 explains it best below.
http://forum.xda-developers.com/showthread.php?t=845844&page=2
USB Extension Cable
33k-Ohm Resistor (Shack Part No. 271-1129)
10k-Ohm Resistor (Shack Part No. 271-006)
Steps:
1. Cut USB Extension Cable in half, lets name the 2 halves, the half you will plug into the power suppy will be called "Cable A" and the half that you plug into the Galaxy Tab Data Cable will be called "Cable B"
2. On 'Cable A" strip outer plastic to expose all wires within, eliminate Green and White on this cable only as it will not be needed, leaving you with only the Red and the Black Cables
3. On "Cable B" strip outer plastic to expose all wires within, this should leave you exposing all 4 wires
4. On "Cable B" strip both the Green and White wires and join thes 2 wires with the 2 resistor ends (you should be using the resistor ends that have the red band with these wires), these can be joined by either soldering or just twisting together.
5. Strip Red wire from both cables and join together with the 33k-Ohm Resister (this will be the larger of the 2 resistors and should also be the end with the Gold Band) and as well join these together with solder or just twisting together.
6. Repeat the above process with the Black wires and 10K-Ohm Resistor.
7. No finally use Electrical Tape or Shrink Tubing to cover all your work.
USB Charging
Hi Guys
I recently bought a "Samsung Charging Adapter" from power gorilla for use with their portable power packs.
It is a usb adapter which when used in line with the Samsung USB cable, charges my 7.7 while I am using it from a 500ma USB port on my MAC ....
Philip
This works great for $7, has a switch to go from data to charging
http://item.mobileweb.ebay.com/viewitem?itemId=160709394617
how do you force charge on Galaxy Tab 10.1??
razorwokid said:
how do you force charge on Galaxy Tab 10.1??
Click to expand...
Click to collapse
Wrong forum Look in 10.1 development forum, in the thread for pershoot's kernel. Or buy one of the cables mentioned above.
morkli said:
Wrong forum Look in 10.1 development forum, in the thread for pershoot's kernel. Or buy one of the cables mentioned above.
Click to expand...
Click to collapse
Thanks for the response
I have similar charging problem with the stock data cable, but I could be able to charge with a USB 2.0 mini USB cable with a Galaxy Tab to mini USB convertor as shown below.
And I even use an USB extension and it is charging up just fine.
I just ordered this
http://www.ebay.com/itm/Micro-USB-t...-Galaxy-Tab-P1000-7500-7510-730-/170969489675
for $2.99 I hope it works. The things we go through in order to be not price gouged..
I have an existing HDTV (HDMI) adapter and its charging well with the included usb data cable of 7.7. :good:
http://www.samsung.com/us/mobile/galaxy-tab-accessories/EPL-3PHPBEGSTA
Although if you don't have it, it's not practical to buy one just for your usb cable to work for charging.
kazuni said:
I would like to charge my SGT 7.7 with the normal USB cable it came with on my pc; however, due to its lower mA output (USB standard is 500mA). The standard adapter it came with has 2000mA (2A) output, hence it detects and charges. However, I do notice that the unit charges at 1A with my iPhone charger, perhaps just a bit slower.
Anything we can modify in the rom to enable force usb charging? there is such a way in SGT 10.1 but I can't find a method similar to it on my 7.7
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also would like to know how to force charge via USB I have gigabyte mainboards that have special charging ports that have 3x normal power .. but still can not get them to recharge my galaxy note 2 while its being used :S
strangely my old laptop with USB Ver 1 .. recharges the phone when in use ...
using Ubuntu and unsure if its pc sided software issue or android related issue
The device will certainly charge slowly via USB, although the battery animation may not show it.
You may use other adapters etc, but I'm fairly sure they don't actually work due to kernel limitations. Changes may need to be made within the kernel (same as SGS2) to actually increase actual charging current. SGS2 was set at USB 450mA. I'm sure I've seen the mod while searching github kernel source code.
Some of the measurement apps out their are quite inaccurate, and I have only used as I guide.
You could use init.d script to set on boot, but anything larger than 450mA could be just placebo,.... unless kernel enabled....
If I'm wrong, please correct me.
Sent from my GT-I9300 using xda premium
Simple solution turn off ur tab then connect it to laptop/pc mac/imac it will charge normally
Sent from my GT-P6800 using xda premium
khanfuze said:
I just ordered this
http://www.ebay.com/itm/Micro-USB-t...-Galaxy-Tab-P1000-7500-7510-730-/170969489675
for $2.99 I hope it works. The things we go through in order to be not price gouged..
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Click to collapse
This is garbage. I had three of them and they all broke within a month.
This is what I use now. Built to last.
http://www.amazon.com/gp/product/B009I4HEOO/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1