I notice something when using original USB cable.
If you just plug into some USB power supply, it will prompt USB mode.
However, if you short out pin 2 and 3, it won't prompt, so I did some mod on USB lead-in (short extension) cable to
1. disconnect 2 and 3 to source (male).
2. shorten 2 and 3 to destination (Tab, female side).
After that, Tab may or may not show charging, but it charges anyway and it charges faster than just use the cable.
If you just plug into some USB power supply, it will prompt USB mode.
However, if you short out pin 2 and 3, it won't prompt, so I did some mod on USB lead-in (short extension) cable to
1. disconnect 2 and 3 to source (male).
2. shorten 2 and 3 to destination (Tab, female side).
After that, Tab may or may not show charging, but it charges anyway and it charges faster than just use the cable.