“The key issue is tha amount of power storage the battery will hold. The nupower battery does not seem to have a larger capacity than many cheaper alternatives.”
Hi Dave, thank you for your feedback. This is not very typical of these batteries, can you get in touch to let us know the specs of your Mac and if there are any extra drives you are running. It may be a faulty battery. We'll be happy to replace it with a new one.
“Have put this battery through a few charge cycles and so far is meeting expectations. I have gotten 4.5-5.5 hrs 'typical' use out of it (includes maybe an hour of inactivity when I was away from the comp).”