That CS9 is making me sad. My bass player broke mine; it is at the shop, hopefully they can fix it. That is the most EVH-sounding standalone pedal I own.
I just use a stick on battery powered digital clock. But I have one on every pedalboard. I also have a phone charger. There are apps that show the time and won't let the phone shut down. It is great for shows where I can't see the clock. And it charges my phone!