The broad importance of energy storage devices, in mobile phones and automobiles, and in the overall electric grid system of the United States, is examined in detail.

[1][2] The documentary film is narrated by Jay O. Sanders and includes the following participants (alphabetized by last name): According to David Templeton of the Pittsburgh Post-Gazette, the program "walks the viewer through the science of how batteries work, returning to that theme time and again to explain variations in design to create cheaper, safer, longer-lasting batteries and energy-storage systems.

"[5] Vicky Hallet of the Washington Post writes that lithium-ion batteries "gained widespread popularity because of their ability to pack a lot of energy into a lightweight package."

However, such batteries – due to the thermal runaway properties of the varieties of lithium-content rechargeable cells that use lithium cobalt oxide in their positive electrodes – can potentially burst into flames.

[6] Hallet reports that the program presents an important notion: "Batteries are evolving to do more, and do it safely.