If you wish to add a power switch, don’t solder both ends of the battery cage
directly into the board, instead:
ADDING AN ON/OFF SWITCH
Solder one end of the battery cage to the PCB,
either black to ‘-’ or red to ‘+’.
1
Solder the other end of the battery cage
to the on / off switch.
2
Using a piece of wire, solder the remaining
terminal on the on / off switch to the
remaining power connection on the PCB.
3