Defective relatively quickly

Initially, this was the original battery Nikon battery in terms of performance in every way and showed no weaknesses even in cold weather. After almost a year but the load capacity and power output capacity from increased rapidly until the battery finally was completely "dead" and was not detected by the charger. By comparison, the Nikon battery so far a much higher number of cycles has to show and is still quite useful. The same is true with other Accessories Batteries.