Shimano Steps display power take off?

[Tom Rae]

My Focus has a Shimano display which has two additional "sockets" which I presume are for Di2 and lights on tourers? I use my phone for navigation and on longer rides in remote locations it roams so goes through the battery rather quickly, I am wondering if either of these sockets could be used to supply voltage to my phone which is mounted on the stem. I currently carry a wee battery pack but it is not ideal.

Tom

 

[stumpy150]

micro usb ??

 

[Tom Rae]

micro usb ??

There is no Micro USB connection on the display. I think the only answer may be to use a charging lead from the lighting connection which is beside the motor but there will need to be something to ensure the voltage is correct?