Root mean that Sony knows why!
So screwed up my phone and the numerous questions why only silent, silent.
Only the integration of card reader or USB hub to power the bank is the easiest way.
Perhaps the Chinese produce something if Sony does not want to
Xperia L (C2105) ROM (JB) Clean 'n' Tweaked, Kernel ThunderZap v3.1 overclocking 1.3GHz, BL Unlocked, Root, Power Toogles v2, Cyber-Shot v2
Xperia J, Xperia Pro, Omnia 2 2x, Nokia E61, N73, 6600