5 times the nominal rating of the battery - it's a term we throw around loosely in Radio Control, based on Elec.Eng terminology that is too complex for us layme

5 times the nominal rating of the battery - it's a term we throw around loosely in Radio Control, based on Elec.Eng terminology that is too complex for us laymen :) A 1000 milliamp/hour battery has a C rating of 1 i.e. 1 ampere/hour. So for a typical Lithium Polymer you'd charge this at at most 2 Amperes to prevent damage to the battery. A LiFePO4 could be safely charged at 5 Amperes, which drastically reduces the charge time - very useful if you're at a flying site and are charging packs in between flights to extend your flight time and make use of good weather.