It came with my Sony HDR-UX20 camcorder starter kit. Not only does it have the problems listed by the other review, but it also cannot be charged by the camera like the Sony battery. It requires the purchase of a charger.
When attached to the body of Sony HC7, the camcorder shows info: "Cannot use this battery on camcorder" and shuts off. Repeated attempts to start the camcorder yield no action, not even the message again. I would not want this battery even if it worked. For some reason it requires a jumper cable to be connected to the back of the battery across two terminals. It looks flimsy. Terminals are hidden under the rubber covers when not in use. One of them has a green LED which, according to instructions, turns yellow when the battery is low. The picture of the battery on this web site does not show this cable.