This battery is very cheap compared to the genuine article. On first charge, it seemed to be ready very quickly, and it was only a few weeks later, having taken some 20 or so photos, that I found that it had not held its charge for long. Second time around I charged it up, unplugged the charger, plugged it back in almost immediately and it took another 20 minutes before the charger said it was charged. I repeated the process twice more, and the last time it seemd to be fully charged. So far it has lasted a week and I have taken 5 photos, three with flash. It is currently indicating a full charge, so lets hope that it carries on doing so.
If it does then, it will be a great bargain.
While it is listed as a video camera battery, I am using it on my Canon EOS 300D.