What power source do I need to perform the electrolysis of water?
A low-voltage DC power source is needed for the electrolysis of water. The Battery Eliminator Power Supply (AP5375) is a great power supply to use for electrolysis experiments. However, a 6-volt or 9-volt battery will also supply enough electricity to electrolyze water. Caution: Do not use an AC power supply for electrolysis experiments. AC current will produce an explosive mixture of hydrogen and oxygen gas in the tubes of the electrolysis chamber.