Set of 4 single AA battery holders that snap together to form either parallel or series connection.
By using these 4 battery holders you can get 1.5V, 3V, 4.5V or 6V (series connection) or get 4x current at 1.5V (parallel connection).
Great, versatile AA battery holders for any electricity project.
Exciting magnet exploration for ages 8 and up!
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Heavy-duty microscope for high-school and college biology labs. Magnification of up to 1000X.
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This SUPER Erector Construction set is one of the best you'll find anywhere!