Sony Discman D-777 Operating Instructions Manual page 11

When to charge the batteries
When the batteries become weak, &0 in the
display on the remote control flashes.
When the batteries are used up, ©} stops
flashing and lights up. Charge the
rechargeable batteries.
aw
Battery life (approx. hours) *
When Time
Playing with ESP off 5
Playing with ESP on 4
*When you use the Discman on a flat and stable
place.
Notes
* Charging time varies depending on how the
rechargeable batteries are used.
¢ If the battery is new or has not been used fora
long time, it may not be charged completely
until you charge and discharge it three or four
times. : °
* If the battery life reduces by about half, replace
it with Sony NH-9WM rechargeable battery.
Do not use any other rechargeable battery.
For extended use
Insert the rechargeable batteries and also
attach the battery case.
For the battery life, see the following table.
Battery life (approx. hours)*
a
When using ESP function
off on
and two dry batteries
*When you use the Discman on a flat and stable
place with alkaline batteries.
Notes
¢ Do not charge the dry batteries.
¢ Do not mix new batteries with old ones.
¢ Do not use different types of batteries together.