[Q] USB Charging

M

moz2k12

Senior Member

Nov 16, 2012

63

6

Vienna

• Mar 12, 2014

• #1

Hi

I have the Tab Pro 8.4 since yesterday.
Today i noticed that charging over USB is not working. I get a red cross in the Battery Symbol.

Anybody with the same Problem?

 

S

Samsara69

Senior Member

Dec 14, 2006

123

16

• Mar 12, 2014

• #2

Hello.

If you mean charging by other charger than original, it's normal.
All Samsung Tab need original charger or compatible charger (mean mentioned "for Galaxy Tab").

 

M

moz2k12

Senior Member

Nov 16, 2012

63

6

Vienna

• Mar 13, 2014

• #3

Samsara69 said:

Hello.

If you mean charging by other charger than original, it's normal.
All Samsung Tab need original charger or compatible charger (mean mentioned "for Galaxy Tab").

Click to expand...

Click to collapse

no I mean charging on the USB Port with a normal Micro USB Cable. I have one here from a Galaxy S2 or S3 and with them it doesn't work.

 

P

phage80

Member

Apr 6, 2012

45

8

nVidia Shield Android TV (2017)

Huawei Nexus 6P

• Mar 13, 2014

• #4

It requires 2amps to charge while the screen is on. The other chargers are probably only providing 1amp so while screen is on it is not charging.

 

M

moz2k12

Senior Member

Nov 16, 2012

63

6

Vienna

• Mar 13, 2014

• #5

phage80 said:

It requires 2amps to charge while the screen is on. The other chargers are probably only providing 1amp so while screen is on it is not charging.

Click to expand...

Click to collapse

once again, i dont use the charger, it is connected to the USB Port from my Computer!!!! Normaly a Device like the Nexus 7 is charging wenn connected over USB, the Tab Pro 8.4 not.

 

P

phage80

Member

Apr 6, 2012

45

8

nVidia Shield Android TV (2017)

Huawei Nexus 6P

• Mar 13, 2014

• #6

Then it is the same issue.

A computers USB ports only output 500ma for usb 2.0 devices unless the machine has a piece of software designed to tell it to send more over the port.
It is still not the 2 amps required to charge the device while the screen is on, it should still slowly charge with the screen off.

The nexus 7 probably has a lower power draw allowing it to charge at 500ma with the screen on.

 

S

Samsara69

Senior Member

Dec 14, 2006

123

16

• Mar 13, 2014

• #7

moz2k12 said:

no I mean charging on the USB Port with a normal Micro USB Cable. I have one here from a Galaxy S2 or S3 and with them it doesn't work.

Click to expand...

Click to collapse

It's what i mean.
You cannot use another charger or computer USB port than original or compatible for recharge Galaxy Tab.
It's not a question of intensity ,Galaxy Tab wait for signal on +-DATA pin .
Original charger has 2 resistors between +-DATA for be recognized by Galaxy Tab.
You can use a special USB dongle for recharge at any USB port http://dx.com/p/usb-charging-adapter-for-samsung-galaxy-tab-black-151322

 

M

moz2k12

Senior Member

Nov 16, 2012

63

6

Vienna

• Mar 14, 2014

• #8

Samsara69 said:

It's what i mean.
You cannot use another charger or computer USB port than original or compatible for recharge Galaxy Tab.
It's not a question of intensity ,Galaxy Tab wait for signal on +-DATA pin .
Original charger has 2 resistors between +-DATA for be recognized by Galaxy Tab.
You can use a special USB dongle for recharge at any USB port http://dx.com/p/usb-charging-adapter-for-samsung-galaxy-tab-black-151322

Click to expand...

Click to collapse

That su...., never seen this on other brands!

 

S

Samsara69

Senior Member

Dec 14, 2006

123

16

• Mar 14, 2014

• #9

Same for iPad and somes Asus Transformer.

 

M

moz2k12

Senior Member

Nov 16, 2012

63

6

Vienna

• Mar 14, 2014

• #10

I found right now that it is charging also when there is the red cross in the battery symbol

 

S

Samsara69

Senior Member

Dec 14, 2006

123

16

• Mar 14, 2014

• #11

moz2k12 said:

I found right now that it is charging also when there is the red cross in the battery symbol

Click to expand...

Click to collapse

Are you sure?
If you switch off the Galaxy Tab, it charge under computer USB,otherwise not.
Here the user manual
http://downloadcenter.samsung.com/c...axy_Tab_PRO_KK_English_User_Manual_NAC_F2.pdf
Page 7

Samsung said:

Note: You cannot charge the battery using the USB cable and
your PC

Click to expand...

Click to collapse

 

A

ares3456

Member

Apr 28, 2011

12

0

• Mar 14, 2014

• #12

Out of stock

Samsara69 said:

It's what i mean.
You cannot use another charger or computer USB port than original or compatible for recharge Galaxy Tab.
It's not a question of intensity ,Galaxy Tab wait for signal on +-DATA pin .
Original charger has 2 resistors between +-DATA for be recognized by Galaxy Tab.
You can use a special USB dongle for recharge at any USB port

I looked at that link and this item is out of stock. Does anyone know if/where there are other suppliers who might make or sell something like this?

Click to expand...

Click to collapse

 

S

Samsara69

Senior Member

Dec 14, 2006

123

16

• Mar 14, 2014

• #13

You can build it, just need two resistors http://xdaforums.com/showthread.php?t=975558

Or buy here http://www.ebay.com/itm/USB-car-wal...laxy-TAB-2-7-0-GT-P3113-Tablet-/190703274313m
http://www.china-cell-phone-accesso...or-samsung-galaxy-tab-p1000-p1010-p-1608.html

Cheaper http://www.ebay.com/itm/USB-car-wal...msung-Galaxy-TAB-Switching-2-1A-/321169666171

 

Last edited: Mar 14, 2014