Originally Posted by creedicd
Rather than debate the technicalities of battery phyics (which I am not qualified to do). Here is a video of a L-ion battery being damaged. http://www.youtube.com/watch?v=4OsBc8RqSKU
Oh that's just ridiculous. This video is a demonstration of what happens when you puncture an over charged Lithium POLYMER (LiPo) battery. Our batteries are Lithium Ion (Li-ION) batteries. I can't post links yet but if you want to see a video of what happens when you puncture a fully charged Li-ION battery cell search for "lico 18650 cell puncture test" on youtube. I can save you some time and tell you that nothing happens and the battery is thoroughly compromised.
Now it is true that puncturing a Li-ION cell will make it non-operational AND if pressure is allowed to build up can increase temperature and cause it to "vent". But shaving off part of the hard plastic casing is not going to damage the Li-Ion cell. You would need to drive a nail through the body of the case to do that.