From some time, my great Philips Wake-up Light start suffering from resetting clock time after short power loss.  I remember that some time ago, when unplugged in power loss occurred after power back clock time was continued. It clear indicate problem with backup battery. I decide to open and investigate.

Inside i found not a single use backup battery but capacitor. Over time it’s lost capacity.

I do not have spare so decided to order new one from bay.

Continuation