Purchased this battery for a Canon camcorder, I was a bit worried whether it would have the same functionality and power as the original Canon. I can't report how long it will last after should a short period of use, but initially it works the same as the original. i.e. the recording time is recorded on the camera, it charges in the camera and actually records for a longer period than the original.
Therefore at a fraction of it's OE equivalent price, I would highly recommend this battery and you are getting a well known battery manufacturing brand name as well.