I purchased a "factory renewed" model. It looks new except for a small area on the right edge of the case where it was clearly dropped. Other than that blemish, everything about it works great...when it is plugged in.  Advertised battery life for this model is 8 hours.  On a 100% full charge, I unplugged it to see what I'd actually get.  After 30 minutes, I'm already down to 81%. I'll be lucky to get 2 1/2 hours on this battery. I'm going to contact the company and try to get them to provide a new battery. Clearly this one is old and/or has developed a memory.  I'll update this review to 5 stars if they make it good on the battery.