udir/c UD1805 Operating Instructions Manual page 10

The battery contains less power when leaving the factory,
so it must be charged and saturated before use.
Battery
input port
Model Battery
Warning: someone must be watching while charging.
Please use the charging box provided with the product and make sure it is connected properly.
1) Pull out the body clips
Assembly of the transmitter battery
Note Direction.
Open battery cover at the bottom of transmitter. Install batteries.
Follow the direction of batteries designated in the inside of the battery box.
Model Battery charging
Charger
output port
①
Charging
Charger box
Assembly of model battery
Remove the body
1.5V×4 AAA Batteries(not included)
Connect the attached charger with the model battery charging
input port, and then connect other USB output ports. When
charging, the charging indicator is flashing, and the indicator is
always on after charging. Do not put the battery in the model
when charging. The battery must be cooled before charging.
Power
10
Battery Cover
②
USB adapter (not included)