While two pronged power connectors will work, theyre not utilizing the extra safety that been the standard for over 60 years when needed. That doesnt mean two pronged plugs are dangerous; they have double insulation, which is fine for smaller devices. This means the plug is encased in two layers of non conductive material to protect the user from electric shocks without needing the third ground prong. So plugging a two prong power connector into a three prong socket is safe for charging your...