Cuecore2 keeping clock how long when powerd off?

[eyebrow]

Hi.
I have an install coming up with a Cuecore2 and it turns out that the power supply for the system is running from the streetlights twilight relay.
Should be no problem as long as the super-capacitor holds the internal clock running when the Curecore2 is without power.
So the question is for how long the system holds the clock running until powered up again?
Once powerd up i want it to trig the scheduled playbacks when the time comes every 30 minutes as soon as it reaches a 30 min point at the clock.
The Cuecore2 will be without power approx 10-12 hours during summer and shorter during winter.

[Julien Levaufre]

The Cuecore 2 can easily keep its time information for more than 2 days,