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C. Using the Built-in Battery
The unit has a built-in, non-replaceable, rechargeable battery. Charge the built-in battery before using it for
the first time. The normal charging time should be completed within 3-4 hours. The red charging light will go
out when the built-in battery becomes fully charged.
To Recharge the Built-in Battery
WARNING
• The built-in battery should not be exposed to excessive heat such as sunshine, or the like.
• The built-in battery presents a risk of or chemical burn if mistreated. Do not disassemble, place near a
source 212°F (100°C), or incinerate.
• Dispose the unit with built-in battery properly. Environmental problems must be considered and local rules
or laws governing the disposal must be strictly followed.
CAUTION
• The built-in battery can only be recharged when the unit is in CHARGE mode while using the AC adapter.
• The built-in battery cannot be recharged when the unit is in power ON mode.
• Do not recharge the battery in the vehicle by using the car power adapter.
• When the built-in battery power is low, "BATTERY LOW" will appear on the screen and the unit will stop
playing.
• Recharge the built-in battery when you are ready to use it again.
• While using the built-in battery, the environmental temperature should be 41°F (5°C) to 95°F (35°C).
• To get the longest service life of the built-in battery, charge at indoor temperature.