At our current technology level it would take billions of years to make and contain even a gram of antimatter. Even if we could do it fast, it would cost billions and billions to get that gram, and I don't even want to know about how much energy we had to pump into that process to get that much antimatter, but I doubt it's efficient. I don't think efficiency in itself is a big deal for your question though. Because you're kind of talking about using antimatter as batteries. A ridiculous amount of energy goes into the making of a chemical battery (x150-500) considering the energy you get out of one, but they are still useful because they are highly portable and small.
I'm sure there will be more breakthroughs in our lifetime on the laboratory scale, though. Actually a lot of progress has been made in the last 10 years.
Last edited by Azisien; 10-25-2013 at 12:19 PM.
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