yes i've heard people say either way but i've definitly seen a couple battery systems die that way too, so you are taking a risk,
in your case your yellow top might probably only be discharging to the point so that its equal with the stock batt....
might be interesting to test and compare them after sitting for awhile...//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
if it is doing that, then you've wasted your money on the expensive yellowtop and you might as well have bought a battery identical to your stock one