"Laptop Battery not charging "plugged in, not charging"?"に関する回答We are not here because of not CHARGING problem. The question was that our laptops have primary and secondary battery but this ugly machine looks like it is ONLY USING PRIMARY BATTERY AND WHEN IT IS EMPTY IT JUST SWITCH OFF. HOW TO SEE THAT THIS UGLY BLACK THING WHICH IS OVERPRICES IS USING SECONDARY BATTERY???!!!