The Daniel battery container is a plastic container used in physics classes to explain the working principle of batteries.

The Daniell battery is a battery discovered by British chemist and meteorologist John Frederic Daniell in 1836. It is considered a major improvement over the Volta battery in the early stages of the historical development of batteries. It is a battery that uses copper and zinc electrodes and produces an electrical voltage of approximately 1.1 volts. Each electrode is immersed in solutions containing its own salts and separated from each other by a porous partition. While the zinc electrode dissolves, copper ions collect on its own electrode. In the Daniel cell, copper and zinc electrodes are immersed in copper II sulfate and zinc sulfate solutions, respectively. While zinc is oxidized at the anode according to the half-cell reaction, copper is reduced at the cathode. Since neither of these half-cell reactions can occur alone, the two half-cells must be connected so that ions can move freely. A porous barrier or ceramic disk that allows the flow of ions can be used to separate two solutions. Half cells are placed in two different containers and the two cells are connected to each other with the help of a salt bridge.