OK, so, how much bulge is too much bulge? I've noticed that a couple of my batteries bulge enough the when the battery is laid flat, it rocks back and forth a little. But only right after use, when I let them cool down all bulge is gone. I also have a couple that exhibit a very tiny bit of bulge, and I'm just wondering, is a tiny bit of bulge on a hot, just used battery ok? Or is any amount of bulge too much?