I'm using right now, give me up to 3 up hours without connect to the electricity.
The Battery works great!!! I used it for a flight from Dubai, UAE to Atlanta Georgia and it lasted most of the trip.
Excellent investment! I'm rarely impressed with technologies but this battery is one of my best investments in years. I frequently work without power for several non-stop hours. This battery has outlasted me on numerous occasions--with as many as five hours of solid support. This, even when browsing the web while simultaneously working in three separate applications.
I bought this because my old battery would only hold a charge for 20-30 mins. I wanted to extend this as much as possible so I bought the battery. the regular one works for 1.5-2 hours, longer if I turn down the screen brightness.
