What's the most energy-dense and currently commercially available chemical battery technology? Would it be the Lithium-Ion Polymer or has it been surpassed already? 

There's is a chemical non-rechargeable battery which is more energy-dense than LiPo, even if it's less power-dense?

I'm trying to have a general sense of the current state-of-the-art technology, as the Wikipedia articles and tables seems to be very dated.

Edit: I meant "dense" as in respect to mass. I believe that "specific energy" would be the right terminology.