Nikon COOLPIX S4200 Reference Manual page 187

C
Charge Lamp
The following chart explains charge lamp status when the camera is connected to a computer.
Charge lamp
Flashes slowly (green)
Off
Flashes quickly (green)
Battery charging.
Battery not charging. If the charge lamp changes from slow
flashing (green) to off while the power-on lamp is lit, charging is
complete.
• The ambient temperature is not suited to charging. Charge the
battery indoors with an ambient temperature of 5°C to 35°C
(41°F to 95°F).
• A USB cable is not correctly connected or the battery is faulty.
Reconnect the USB cable correctly or replace the battery.
• Computer is in sleep mode and does not supply power.
Reboot the computer.
• The battery cannot be charged as computer's specifications or
settings do not support power supply to the camera.
The Setup Menu
Description
E79