I'm almost embarrassed to ask this question, but would a brand new replacement battery make any difference in the way a car runs, aside from starting up more quickly (and reliably)? I just put one in yesterday after my original (!) was put to rest, its length of service and the cold weather were just doing it in; sometimes cranking over the engine lately was getting to be a bit too dicey a propostion. With the new one in the engine turns over strongly right off the bat, but it also seems that the car just runs more smoothly and powerfully now even in normal driving. Is this just my imagination or might there be something to it (that passes the laugh test)?