let's assume data: C = 60Wh (battery capacity) Vcharger = 230V Ain = 5A in = 85% (typical efficiency for laptop chargers) Vrms = 230V * sqrt(2) ~= 162.6V Pout = * (Vrms * Ain) = 0.85 * 162.6V * 5A ~= 691W T = C / Pout = 60Wh/691W = 0.08h = 5.2min
A) if you charge your battery with 11C its pretty much dead after 2 charges B) I don't understand what you are calculating