Energy cell
The energy cell was a piece of technology providing energy for various devices.

The Na'kuhl Vosk claimed that in the 29th century energy cells the size of a coin existed. ()

In 2267, Pavel Chekov speculated that whenever Apollo rested, he was in effect recharging his energy cells. ()

The energy cell usage of a Federation phaser rifle, manufactured by the Romulans in 2367, remained constant at 1.05 megajoules per second. ()

In 2369, Worf connected his communicator's energy cell to a holographic telegraph machine to create a short-lived force field. ()

Energy technology