Eton Speaker System User Manual page 7

REGULAR CHARGING MODES
POWER SOLAR
OFF
OFF
OFF
ON
ON
ON
Pressing and holding the button shows the condition of the
Li-ion battery. The Li-ion battery (SW9) starts charging once the
AC adapter is plugged in or when the solar panel is in direct sunlight.
DC BATTERY UNIT DISPLAY
(1 blink every 2 secs)
SOULRA USER MANUAL
7