Step 4Prepare The Motor
The flat side of the battery (+) is already making contact with our tin support. To get a contact with the top of the battery (-) we bend one of the pins back underneath the motor. When we put the motor in place this lead will spring in contact with the top of the watch battery. (Picture is worth a few hundred words here.)
If you're using a different motor, say one with wires then you might need to get busy with a soldering iron to replicate what we have here. Do not solder directly to the battery. Applying that much heat to a battery is dangerous and can cause it to burst.
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