"Rechargeable" Engines. Which ones are they?

[WillWam]

Where can I find Ion engines and how do I put them to use? They don't make much sense to me.

[Geonovast]

There's only one in the stock game.  And it's not rechargeable... it simply uses electricity to fling xenon out into space to provide thrust.  So you still need the xenon as propellant.  The batteries are rechargeable.

https://wiki.kerbalspaceprogram.com/wiki/IX-6315_"Dawn"_Electric_Propulsion_System

[WillWam]

1 minute ago, Geonovast said:

There's only one in the stock game.  And it's not rechargeable... it simply uses electricity to fling xenon out into space to provide thrust.  So you still need the xenon as propellant.  The batteries are rechargeable.

https://wiki.kerbalspaceprogram.com/wiki/IX-6315_"Dawn"_Electric_Propulsion_System

Thanks for clearing up my confusion!

[Sharpy]

Let's add it doesn't use crossfeed rules to draw xenon (or electricity). So it will draw from tanks that are pretty much anywhere on the craft, just according to flow priority - similarly how RCS uses monoprop.

[Snark]

Moving to Gameplay Questions.