Self-Charging Battery

Self-charging batteries are battery-like items that do not hold any charge themselves, but they continuously power machines indefinitely at a passive rate. They are essentially item-sized RTGs.

Tiers
These batteries are tiered and are upgraded from the previous tier. They're named after the primary fuel material powering it. In order of lowest to highest tier and power in HE/tick:


 * 1) Uranium-238 (5)
 * 2) Technetium-99 (25)
 * 3) Plutonium-238 (100)
 * 4) Polonium-210 (500)
 * 5) Gold-198 (2.5k)
 * 6) Lead-209 (5k)
 * 7) Americium-241 (10k)

Recipes
In order of aforementioned list:

Uses
They can be placed into any power slot of any machine that has a GUI and it will attempt to charge it. This is useful for powering low power consumption machines or to assist in powering. Some have crafting recipes however.

The Technetium-99 battery is used in the crafting recipe for magnetic storage barrels and a Polonium-210 one is needed for the Heavy Magnetic Storage Tank.

Trivia

 * Small scale "atomic batteries" exist IRL, but they're usually betavoltaics and use Tritium or other beta emitters. They have a higher efficiency than thermoelectrics.