I'm not quite sure where to put this, but decided that since it's related to billing and billing, this might be the best place, if there are no mods, please feel free to move it.

Anyway, the other day, when booking a rental car, I was looking at the breakdown of fees and surcharges, and among them I noticed a Charge for energy recovery. What the hell is this?!? I tried to find it by doing a Google search, but didn't get any real answers. Does anyone here know what this is, other than some way to squeeze extra pesos out of a guy?