I have the Phottix EN-EL9A with 7.2V 1400mAh for just over a year. During this time the battery was as a replacement battery occasionally for holidays and festive occasions in operation. The performance was to my mind slightly weaker than the original Nikon, but perfectly acceptable. Unfortunately the battery does now no longer supercharged and has no voltage. The life was rather modest in my battery, therefore only 2 stars.