FUTABA 12K Instruction Manual page 16

Turn off the transmitter's
power switch.
Slide the battery cover off the
transmitter in the direction of
the arrow in the figure.
Danger
When closing the battery cover, be
careful that the battery cover does
not pinch the battery lead wires.
Shorting of the battery lead wires may lead
to fire and abnormal heating and cause
16 <Before Use>
NiMH Battery HT5F1800B
Push
Insert the connector of the
battery and load the battery
into the transmitter.
Connect the battery
connector.
Finish by installing the
battery cover.
Warning
Be careful not to drop the battery.
Never disconnect the battery connector
f r o m t h e T 1 2 K t r a n s m i t t e r a f t e r
turning off the power until the screen is
completely blank and the transmitter has
shut down completely.
* Internal devices such as memories may be damaged.
* If there is any problem, the message "Backup Error"
will be shown the next time when you turn on the
power of the transmitter. Do not use the transmitter as
it is. Send it to the Futaba Service Center.