Exactly that, Thing looked like it came out of a fiesta. Half the box size. Looked up a jag battery and it's the size ( actually the same one) as in my LT46. Asked the garage to put me the propper jag one on, then do the tests again, yeah I know it's (possibly) wasted few quid but if bic gets going I'll leave it on, If not It goes on my van which I'm also selling and the semi duff one on the van goes on the car spares or repair.Do you mean small as in physical size? The battery should pretty much fill the box. I forget who it was now but one of our members on here opened his X-Type's battery box after it started to act up and was astonished to find that the battery was nearly half the size that it should've been - someone had just whacked in a battery out of a hot hatch or something. What was more surprising was that the car had been starting fine with that battery for months until it eventually started to give up the unequal struggle.