Fusion furnace

The Fusion Furnace was a small, easily transported power generator used to recharge energy cells. Additionally, fusion furnaces also generated heat and light. These generators are used to charge a variety of different items. Some items are actually equipped with fusion furnaces, eliminating the need for energy cells.

Luke Skywalker brought a fusion furnace with him to Dagobah to recharge R2-D2. As Rebel Alliance command presumably did not know Skywalker was heading to Dagobah, fusion furnaces were likely standard cargo for T-65 X-wing starfighter pilots to recharge their astromech droids.

Appearances

 * The Empire Strikes Back