Seriously now. I always use my external chargers. I use Nitecore and Xtar chargers. I"m very careful with my batteries, but I don't baby them. I store them in their plastic protective boxes. I just examined my current batteries--chocolate LGs, Sonys and Samsungs (all Mooch-recommended)--intact. Never had a torn or otherwise damaged wrap. I wonder if there are some chargers out there that damage wraps more than others? Am I just lucky?