Have, decided after bad experiences with "Cheap Batteries", as they are offered on auction platforms or here for that.
The first low-battery I had problems with the store, the batteries have been excessively heated, even during use. The capacity was initially good, but then after about 10 charges began strongly to fluctuate and subside. With a battery I have ultimately only half of images obtained as with the original battery.
Therefore, the switch to original battery, because adding one orig. Battery Grip to come and I do not want to forego reliability.
Functioning as expected! Top!
The only drawback is the price. Here I would like, if, Allow refer to amazon.com, here is the cost of battery only $ 37 so ~ 26 EUR. Purchase / Shipping via Marketplace is realized under 10EUR, so you get total to around 35EUR. When purchasing multiple batteries so quite attractive.