I have just brought a iPhone 5s online from a long standing NZ store being sold as 'mint condition' and refurbished. Sure enough it appears that the front and back are pristine with only some scratches around the beveled front edge. However I ran some diagnostics on the battery ('Battery Life' app and 'iBackUpBot for iTunes') and the battery has come back as Bad - imminent failure, and listed as 900 left out off 1570mAh. I have sent the store an email yesterday for their opinion and advice but haven't received a reply yet.
My question is due to the description for the phone being refurbished and in mint condition should I have expected a battery with more life (as I did)? Luckily it has a 6 month warrantee on the battery but I needed a reliable phone to replay my iPhone 4S.
I would be interested in your thoughts ...
Steve