Panasonic MC-SB33J Operating Instructions Manual page 8

Charging
Charging
The battery is not fully charged at the time of purchase, so please be sure to
charge it before use .
(Charging time: Approx . 3 .5 hours)
Firmly insert the charging
adapter plug all the way
into the main unit's
connector.
EN8
Request
●
When unplugging the plug, do not hold onto the cord, instead hold
onto the end of the plug.
(This can cause malfunctioning due to the wire getting broken)