Energy collector
An energy collector was a crystalline tree shaped object located on the surface of the planet Delphi Ardu IV and was used by Portal 63 to collect energy from weapons. 

One such energy collector was encountered by an away team from the  in 2364 when they beamed down to the planet and encountered a group of Ferengi who stole a T-9 energy converter. While trying to use their phasers and energy whips to defend themselves, the crystalline tree absorbed the energy from their weapons. ()

Energy technology