A Battery is a Cargo item that is used to give Power to a spacecraft or space station. Batteries can be recharged by any modules that generates power without using batteries.

A single Battery produces 76 units of Power, discharge 0.45%/sec times power used per power generated, and recharge 0.005%/sec times power available, thus giving the Battery a capacity of 13,500 PowerIcon. The Battery will start to recharge if the power available is more than power generated.

Batteries are found in many parts and spacecrafts such as the Station Builder Tug and the Pod.

Note: You cannot access these from inside the menu, you must launch the rocket, then switch to cargo view to move the batteries, or exchange them during rocket assembly.