I just picked up a brand new black Mini last night from my local Apple Retail Store and fully charged it over night. I used it for about 45mins this morning but it was on standby unplugged for about 4hrs total. The battery was at 97% when I turned it off and then back on due to both Safari and Chrome refusing to browse the net. Upon reboot both browsers worked fine but my battery % went back up to 100% and has been there for about an hour now. Has this happened to anyone else before? The Mini is on iOS 6.0.2.