Everytime a power failure occurs, the date&time setting in my Xbox 360 resets to year 2005. It's annoying because some games keep track of my progress using the date&time (e.g. Your Shape Fitness Evolved 2012). It is also bad because save data also records date&time and whenever I need to load a saved data, it shows me 2005.
Isn't there a CMOS battery in Xbox 360 to preserve the date&time setting? If there is, I'm going to suspect mine has drained. If there is not, what are my chances to preserve the date&time setting?
Note: I also use an uninterruptible power supply (UPS) with my Xbox 360 for safety, but I have turn it off every night just because if the electricity cuts off at night, it wakes me up with an irritating warning sound.