Panasonic HX-WA3 Operating Instructions Manual page 41

≥ At the time of purchase, the [CLOCK SET] is not set.
≥ If the [CLOCK SET] have not been set or the built-in clock battery has
run down, the screen display and recording time information will
appear as follows.
Recording screen display: --.--.---- -:--
Recording time information: 01.01.2013 0:00
≥ To charge the built-in clock battery, install a fully charged battery in the
unit. If you leave the battery for approximately 24 hours, the time
settings will be stored for approximately 7 days. (The charging
continues even when the unit is turned off)
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