need usb to power cable for jbl xtreme (bluetooth speaker)

[Jonas Maeyens]

hi guys, i'm looking for an usb cable to power jack for the jbl xtreme. i bought a powerbank to power the xtreme, but i don't have the right cable to power it. i need the right usb calbe with at the other end the right power end. here is a photo of what has to be at the other side to put in.
sorry for bad english (thx in advance)

https://www.google.be/search?q=jbl+xtreme+usb+to+power+jack&biw=1920&bih=979&tbm=isch&imgil=3I_I2hMeDBwKVM%253A%253BjAgRs95vdp80SM%253Bhttp%25253A%25252F%25252Fallcompanies.website%25252F2015%25252F10%25252F16%25252Ffor-those-who-like-heavier-review-speakers-jbl-xtreme%25252F&source=iu&pf=m&fir=3I_I2hMeDBwKVM%253A%252CjAgRs95vdp80SM%252C_&usg=__g9TLzQunv80SaBAv5YfT7Ond_oQ%3D&ved=0ahUKEwjD9vjnv6zNAhUKIcAKHZzqDsMQyjcIbQ&ei=7pRiV8PHBorCgAac1buYDA#imgdii=3I_I2hMeDBwKVM%3A%3B3I_I2hMeDBwKVM%3A%3BANSDQtXjJV9yKM%3A&imgrc=3I_I2hMeDBwKVM%3A

it's the most right input i'm looking for (power)

 

[little_me]

You are pretty much out of luck and it cannot be done easily.
From what I can google, Xtreme has battery voltage of 7.4V and thus it cannot be charged by USB (5V)
Xtreme's own power supply charger seems to be rated at 19V and 3A. This is based on googling and looking at specs on ebay.
http://www.ebay.de/itm/JBL-Xtreme-Power-adaptor-19V-3A-Original-wie-NEU-/151849775945