Seabases will draw power from internal generators (Nuclear Reactors or Bioreactors) installed inside the base, and also from any external generators (Solar Panels or Thermal Plants) within power transmission range. Power transmission is represented by a thin glowing blue line connecting an external generator to the base. The Power Transmitter can be used to connect generators to bases across greater distances.
Lifepod 5 consumes power much like a seabase, but does not require a generator. It draws its power from three special "self-charging" power cells.
When Energy runs out, the player can replace the empty power source with a Battery or Power Cell from inventory. For handheld devices, equip the device and press the Replace key (default "R"). For vehicles, interact directly with the empty power cell. The Seamoth's power cell is on the underside, towards the rear. The Cyclops has two banks of three power cells, on either side of the engine. Besides replacing its Power Cell, the Seamoth can also be recharged when docked with a Moonpool or Cyclops. The Prawn Suit has two power cells near the storage, and the power cells can also be charged in the Cyclops and Moonpool.
Replacing a partially or fully depleted battery or power cell, or the ion variants, will give the player that used battery or power cell. They can be recharged using a Battery Charger or Power Cell Charger, both of which draw power from a Seabase or the Cyclops.