The memory battery (aka motherboard, CMOS, real-time clock (RTC), clock battery)[2][10] is generally a CR2032 lithium coin cell. This cell battery has an estimated life of three years when power supply unit (PSU) is unplugged or when the PSU power switch is turned off.[
https://en.wikipedia.org/wiki/Nonvolatile_BIOS_memory#CMOS_battery
That is one forgetful protogen.
That or he’s based on an Original Xbox and uses a clock capacitor instead of a battery.