This chapter is mostly a suggestion page.

Do not have unlimited energy for anything. This is applying an overpowered trait to a character.

Expended energy in any form will recover during rest or time. After all energy in fantasies often is felt and sensed. Removing this, you need to have a really good idea.

Tech based:

1. This is most common. Having a sensor or more to read in the fuel, energy amount, or simply energy output. Rather than guessing, it tells how much. So understandable why it is used.

2. Recharging: Battery powered. Self explained. Replacing batteries to recharge abilities or to use the energy for the character. Something close to robotics if used on selves but in gadgets, anyone can use.

3. Recharging: By electrical or shocking terms. This is risky at best. Doing this too many times seems to eliminate the danger. Fried circuits and wires is the minimum damage that a realistic shocking happens to electronics. At worst, death. Simply death.

4. Recharging: By shared means. It is safer than number 3. But this is a short term solution rather than long term. Number 2 can play to fully charge both parties.

5. Switching items to replace the depleted one. Again short term. But it is useful. If something can not be recharged, replacing can help. After all some characters will do this to further themselves toward a goal.

Energy from oneself:

This is hard to think up at first. Here is a few ideas.

1. Mana Batteries: Why I call it mana batteries? Because the energy inside objects are called that. They basically are just batteries that refuel a portion of energy to be used.

2. Sucking energy form another person. This is nothing new. After all some anime do this.

3. Tag in Tag out. Switching users to have one person recover and the other, more charged person to do the task.

Anyways I am sure there is more but this is all I have on this portion.