DeWalt’s been selling a LiIon 36 volt battery pack that’s full of the latest A123 cells. These are the same ones that were used in the Killacycle. (I think they’ve got a new batch of cells now).

One of the hot battery companies in the electric vehicle space right now is A123 systems. They just announced another round of venture funding of $40 million, bringing their total so far to $102 ...

A123 makes a pretty good lithium battery that has a high-cycle life and can put out loads of power. What it's not so good at, however, is holding a lot of energy. At least, not when compared to ...