NOTE: To disconnect the system completely if it not to be used for a
long time, remove the AC power plug from the wall outlet.
POWER SOURCE
This unit works with rechargeable lead-acid battery (the
battery capacity 4500mAh). Fully charge the unit (around
3 hours) before using the product for the first time. The
playback time has about 2hours after full charging. Unplug
the AC Power cord from the AC socket to work on the
battery pack after fully charged. Plugging the AC Power
cord while the battery pack is attached initiates the
charging of this battery, the charge LED indicator lights red
during charging, when the battery is fully charged the
indicator will turn to green. When the unit is with low
battery, the LED indicator will flash in red.
Warning: Do not change the battery, only high-qualified
personnel can perform this operation.