Its not a technical word - you won't find it in a physics paper or similar the word is "current" pure and simple - as soon as you here the word amperage it tends to give a very good idea as to the users technical background or lack of it.
Ever heard anyone talk about alternating amperage or direct amperage?? Technical specs referring to maximum amperage etc
Theres plenty of improper words in the dictionary these days - theres even text speak in there now and on line dictionaries areparticularly bad - and mostly american.
