[vantzeng]

Tools needed:
Electronic knowledge.
DC Power supply with 6 Volt output.

step0:
+- +- +- +-
(BATTERIES=1.5Vx4)
->
+ -
(DC power supply=6V)

step1:
Open the R/C control's battery case.

step2:
You could see a text "LOCK"
when you open/close your battery case.

step3:
Look deeply into where
you put batteries in the R/C control.
You could see there
are four battery slot.
So I define the battery slot which
closest to the text
is the upper right battery -.

setp4:
The lower left battery -
and lower right +
was connected to each other.
(look carefully you could see
there are a wire which was
connected to each other)

step5:
Connect the power supply +
to the upper left battery +,
Connect the power supply -
to the upper right battery -.

step6:
Switch R/C control to the charge position.

step7:
Turn on the R/C control.

step8:
You could see the R/C control is in the charge status.