So far, i've seen/heard of 4 instances where the sigelei 100w eats up battery wrappers. It happened on both of my vtc4's. Also happened on one of my buddy's. Went to a store 2 days ago and one of the customers mentioned it (which is why I noticed mine). Also saw on phils vid that one of his batts had wrapping issues (although I dont know if its due to the sigelei or if it was from something previous). Just wanted to see if other people had the same issue.