Battery fits perfectly into my Acer Aspire 5738th The original battery was labeling AS07A71. The new battery has the same design and offers an equally good battery life as the original battery in the beginning. (Depending on the brightness and stress on the hard drive etc which is always a different value. But as a guide we can assume in normal work (eg office or some surf) in about 2-3 hours.)
The delivery was very quick (with Prime within 22 hours) and completely without problems.
