Battery power is not enough!

I own this battery since the beginning of the year and have him can try in summer under realistic conditions for the first time. The battery could be easily load and operate on the first try. Already here is a strength in comparison with the original battery only about 25% capacity revealed (measured by the number of recordable pictures). Already at the second charging attempt problems arose. The battery is "empty" is displayed in the Camera as the second load operation has already ended but the charger (Canon original) after about 30 sec., "Charged battery" message, but the camera showed still "Battery Empty" , All other attempts to load this battery, were back to max. Complete 30 sec. From the charger. Since the battery is unusable and was disposed of by me. Looking at the other reviews on this battery have awarded either 1 or 5 points, so one must unfortunately expect a significant spread of manufacturing quality. I'm not saying that this battery is basically useless. I say: be careful! Test battery immediately upon receipt extensively and possibly claims immediately!