I purchased two of these batteries but, although they arrived promptly, they unfortunately do not provide a good fit for my Fuji X10's battery compartment. They slotted in ok if a little tightly and when I switched the camera on, no problems. However, when I then attempted to remove the battery I had a real job to do so. After lifting the little yellow latch the battery did not want to move at all. It was in so tightly that I had to play about for ten minutes or so simply trying to edge it out of the compartment using a thin implement. I gingerly attempted several more inserts (but not all the way down) to see if a more comfortable fit could be achieved but without success.
I'm not sure if this is a quality control issue as there are no other reviews citing this problem but I didn't want to risk removing the other battery from it's packaging to see if that one provided a better fit. I can't afford to risk having this kind of problem in a shooting situation so will sadly have to return them.