Here are some examples of other people's M8 charging stations.

KU

back panel:
centered logo on solid background

lip:
KU [illegible] | CHARGING STATION | Student Senate

UMiami

back panel:
centered logo on solid background

lip:
GETCHARGED
Your Phone  Your Responsibility.

Ole Miss

back panel:
centered logo on solid background

lip:
GETCHARGED plus a qrcode

Crowley Middle School

back panel:
logo with text

lip:
"Charging Station | Do Not Leave Unattended / Devices Are Your Responsibility"

Cook Children's

back panel:
logo with words: "Get charged up! Plut into our FREE charging station"

lip:
"CookChlidren's"

Daytona

back panel:
photo and logo with words

lip:
"For Assistance on Race Day..."

Farmington Public Library

back panel:
logo with words: FUEL / Farmington Public Library

lip:
"Your device, your responsibility! / Use at Your Own Risk"

Toyota

back panel:
photo with ads and text

lip:
"COURTESY CHARGING STATION"

LSU

back panel:
Phone Charging Station / LSU / Paid for by your student technology fee

lip:
[illegible] / "NEVER LEAVE YOUR DEVICE UNATTENDED"
 

MetroPCS

back panel:
ad with graphics and text

lip:
Please do no leave your ??? ??? .... ??? /
metroPCS / Wireless for all

Miami Marlins

back panel:
logo

lip:
"courtesy charging station / your phone, your responsibility"

model

back panel:
Need a boost? We've got you covered!

lip:
"Courtesy Charging Station"

Scheduling Institute [?]

back panel:
logo with text: Charging Station!

lip:
"Get Re-energized!"

Texas Tech

back panel:
logo with text: Charge Your Phone Here

lip:
"Like Us on Facebook: [facebook URL]"

Texas Health Harris Methodist Hospital

back panel:
just text on solid background

lip:
"Courtesy charging station /
your phone / your responsibility"

Virtua

back panel:
logo with "Virtua"

lip:
"Courtesy Charging Station / 
your phone / your responsibility [?]"

AT&T University

back panel:
logo with text, including "GETCHARGED"

lip:
power logo with "charge UP" /
"Your Device, Your Responsibility... [?]"

l

Hamilton-Wenham HS Library

back panel:
"Charging Station" with logo

lip:
power logo with "charge UP" and "Your Device. Your Responsibility." / 
"Do Not Leave Device Unattended. This Location Is Not Responsiblity for Misplaced, Damaged or Stolen Devices."

 

Logos we could use