He counted on the fact that she wouldn't be operating at one hundred percent efficiency.

Power can be transferred at up to 98 percent efficiency.

Five percent efficiency isn't exactly going to set the world on fire, but there is a lot of room for improvement.

We expect about ten percent efficiency, and of course some interaction with the bottle.

"What it does is convert mass into energy at 100 percent efficiency."

"But their weapons emitters are at close to 98 percent efficiency."

"And we find many buildings running at 70 percent efficiency," he said.

Let's assume that we can store the snow and ice with 50 percent efficiency.

We've got to get that back to 75 percent efficiency.

The study sets a target of 49 percent efficiency by 2030.