Sony ILCA-77M2 - Manual (Page 22)

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Preparing the camera
Charging the battery pack
When using the camera for the first time, be sure to charge the NP-FM500H
InfoLITHIUM™ battery pack (supplied).
The InfoLITHIUM battery pack can be charged even when it has not been
fully depleted.
It can also be used when it has not been fully charged.
The charged battery pack is discharged little by little, even when you do not
use it. To avoid missing an opportunity to shoot, charge the battery pack
again before shooting.
1
Insert the battery pack into the
battery charger.
Push the battery pack until it clicks.