BUILD A BATTERY HOLDER

Background

Our first step will be to build battery holders that will allow us to connect up the batteries easily. Each team should make two holders.

Materials Needed For 1 Holder

1 D Cell battery
1 Toilet paper tube
2 nails
Tape 		2 Thick rubber bands
2 Pieces of foil
2 1-foot long wires with washers
Long strips of newspaper

Procedure

1. Wrap a stack of newpaper strips around the battery until it fits snugly in the paper tube. You may need some tape to hold the paper in place. BE CERTAIN THAT THE PAPER DOES NOT GO PAST THE ENDS OF THE BATTERY.

2. Put the wrapped battery into the center of the tube.

3. Mark the tube clearly with + and -signs to match those on the battery.

4. Gently crumple a piece of foil and put it in the tube on top of the battery.

5. CAREFULLY push a nail through the tube as close as possible to the foil. Use a pencil point if necessary to make holes.

6. Turn the tube upside down and repeat steps 4 and 5. Both nails should stick out of the sides of the tube in the same direction.

7. Put a rubber band over the 2 nails on each side. These rubber bands should be tight enough to pull the nails toward each other.

8. Attach one wire to each nail by wrapping the bare wire end tightly around the nail.