This battery properly replace the original battery with a greater thickness that raises the device and actually provides better ventilation. Initially to date (16/11/2014), autonomy varies between 2:30 ET 3h in normal operation (office outside the Internet) and just over 2 hours with Internet use. To date, the operation of this battery is ideal. I'm not even interested in me option life extension but I unplug the battery automatically when running on AC power and the load is full hoping to preserve it longer than the original in its optimal operation.
