As a happy owner of a new SONY CX 900E I have this camcorder the external charger and 2 Patona- "spare" battery pack (instead of the original battery of SONY: NP-FV70) ordered. I was a bit skeptical because of some "alarm calls: Steer clear of third-party batteries," but I am so far very pleased with the two products! Batteries are easily recognized by the camera, and the battery level indicator work? Time display: 2:31 '! Whether it really is exactly then this time, I can only say later. Only the onset of the battery in the charger was a bit difficult and fiddly, until I found out that, in a certain position at a certain pressure from the top, allowing the battery to use perfectly. Perhaps one could mention the clear but in the small manual, then there would certainly some "negative reviews" for this product less! Speaking of "warning cries: Steer clear of third-party batteries!": 2010 I looked at the Panasonic HDC SD 707 and also bought at Amazon, the bundle Star battery charger with the big Patona Battery for SD-707th The included genuine Panasonic battery has now given up the ghost, the "alien battery" Patona invites still, perhaps not quite as intense as at the beginning but to my satisfaction!