I bought 4 of these batteries using standard mail, bought on Friday, delivered on Monday. I haven't had the chance to use them, so I can't vouch for the length of use, but I have charged them in my camera. Every one of them is a tight fit and I will be attempting to sand them down for easier change out. As is I will need to keep a pair of needle nose pliers on hand. The memory card case seems to have come from a doll collection of purses, so basically you are paying $8 per battery.