Battery replacement, even for fairly expensive ones, is far less expensive than plastic surgery on your face. It's sorta like you can probably run a few red lights and get away with it, but is it worth the risk?
I don't mean to come off sounding so sour, but when one of these things vents, it isn't pretty. Even AW IMR's aren't something I'd want close to my body when they vent. I think of it as paying a few bucks to avoid a trip to the ER.