Although the energy capacity of that cell is pretty high, as someone pointed out, the spec sheets show a nominal discharge current rating of 5A (the sheet says they "can" go higher, check with them for details or customized ones, something to that effect). So this wouldn't be good for automotive usage in my opinion, where 40-60 amp draws can happen regularly on startup, and not good for electric car usage (at least not without some supercaps in line with it) as the current draws and charge rates can be tremendous.
What it looks like to me is an external laptop battery pack, the kind that typically clip underneath the bottom of the laptop to provide extra long runtimes. Or it could go to a portable projector, or something of that nature, basically something flat and portable.
of course many could be paralleled for current sharing, but by itself that (laptop accessory battery) seems the most likely match to the form factor.