I have the Bundle Star Patona Premium Quality Battery for Nikon EN-EL23 (real 1700mAh) bought for two reasons. 1, I have an external charger for this type 2, a good friend told me to this battery. I have to say I'm not a big techie and only amateur photographer. For me it has to be simple and work and does this battery to my complete satisfaction. Was delivered on the same day as the battery I have charged him in my Nikon P 600 is inserted and made about 350 pictures and some Videofilmchen weekend and everything was to my complete satisfaction. I can only recommend the part.