Using Dry Batteries; When To Replace The Dry Batteries - Sony Discman D-777 Operating Instructions Manual

Using dry batteries
1 Hook the battery case onto the Discman
and fasten the screw.
3 Insert two LR6 (size AA) alkaline
batteries by matching the ® and © to the
diagram inside the battery case and close
the lid.
When to replace the dry batteries
When the batteries become weak, © in the
display on the remote control flashes.
When @% stops flashing and lights up, replace
all the batteries with the new ones.