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The same form factor is used for both the A123 Systems/Continental Automotive and the LG Chem/Compact Power Inc. nano-electrode LiION batteries. Of course the hand truck isn't part of the form factor 
Below is the A1234/Continental battery being used in the powertrain testbeds (mules). The view is what you'd see from the rear of the vehicle. The crossbar of the "T" is to be located under the rear seat while the rest is under what would otherwise be the drive shaft hump. For scale; the tiles are ~6".
Reports from the dyno room is that their performance is exceeding many specifications, and often not by a little.
Below is the A1234/Continental battery being used in the powertrain testbeds (mules). The view is what you'd see from the rear of the vehicle. The crossbar of the "T" is to be located under the rear seat while the rest is under what would otherwise be the drive shaft hump. For scale; the tiles are ~6".
Reports from the dyno room is that their performance is exceeding many specifications, and often not by a little.