You can place these things in a Thermal Expansion Energetic Infuser. Although it is easier to simply carry a charged Flux Capacitor (which doubles as a recharging tool for Redstone Arsenal gear) or a charged Energy Cell.
All of these, even the block-type Energy Cells, can be charged at a Flux Capacitor, so it may be a good idea to set one up as a charging station.
When using a Flux Capacitor, remember that you have to activate it with sneak-right-click while holding it.
