For laughs I looked at the schematic they posted, and it appears to me that an attempt was made to allow the clock to work. I am no expert, not even remotely, when it comes to analog stuff, but the power supply circuitry of this thing seems... sketchy, to me. If I'm interpreting it correctly they're using a 3.7v lithium cell as the only bulk battery in the system, and there's a bunch of spaghetti that I think amounts to a boost converter to supply VCC? There a pin on the SoC that's supposed to be hooked to a CMOS battery (along with a couple other pins for the standard 32khz watch crystal, which according to the schematics is present), and they have that CMOS battery pin connected via diodes to *both* the boosted VCC and the raw output from the battery. Which leaves me... confused? I'm not sure why they did that dual connect thing; maybe it's an attempt to have the RTC directly powered by the AC adapter when it's plugged in?