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Title is the question, it's just weird to me like the battery doesn't have anything to do with the date

from https://www.explainthatstuff.com/quartzclockwatch.html
Inside a quartz clock or watch, the battery sends electricity to the quartz crystal through an electronic circuit. The quartz crystal oscillates (vibrates back and forth) at a precise frequency: exactly 32768 times each second. The circuit counts the number of vibrations and uses them to generate regular electric pulses, one per second.
Without the battery, no power is going to the 3DS, so it forgets the date.Title is the question, it's just weird to me like the battery doesn't have anything to do with the date