Each group needs:

• 2 pieces aluminum foil: 8 in x 12 in (20 cm x 30 cm)
• 2 wide-mouth glass jars (must be able to hold at least 150 ml)
• 2 small paper cups (such as Dixie cups), cut at ¾ in from the cup bottom, or 2 plastic caps from milk jugs
• 3 pieces (one: 12 in [30 cm] and two: 31.5 in [80 cm]) of non-insulated copper wire (gauge AWG 20) (available at most hardware stores); a total of 75 in (200 cm) per group. Or, if you have insulated wire, it will work if you strip the insulation off the ends.
• masking tape
• wire cutters
• marking pens
• Two-Cell Battery Worksheet

For a Battery Testing Station for the entire class to share:

• containers for the electrolyte solutions (must be able to hold at least 150 ml); wide-mouth glass jars work well
• electrolyte solutions (make in advance with water and vinegar, citrus juice [such as lemon] or salt; see Procedure section)
• a few graduated cylinders (10–25 ml) or liquid measuring cups or jars with volumes marked on the side
• 3 pairs of safety glasses or goggles
• 1 DC ammeter (to measure current in amperes) (available at most hardware or electronics shops)
• paper towels

For a Cleaning Station for the entire class to share:

• water and sink, or, if no drain is available, a large empty container to collect the used electrolyte solutions
• (optional) paper towels