When the old original battery gave up the ghost, I have sought and found for a cheap and better substitute! The battery fits perfectly without binding and that it is a little thicker, I find even better, since the keyboard is a little higher at the back. In addition, the ventilation of the case bottom is slightly better, with a little more ground clearance, which may already be very beneficial when used in a tablecloth. The battery life is already at more than four hours of intensive use, although the charging and discharging operations is not so often held that the battery has reached its peak performance. If he now holds so long as the rest of the elderly netbook so I am more than satisfied! The delivery was super fast as usual from Amazon!