First I bought a battery of this model duplicate of the original. Used maybe twice, I have not had the time to compare the autonomy nor the behavior end capacity (battery level icon on LCD). With the acquisition of BG-E8 grip (original), I bought a second battery of the same model for an identical pair. There it is where I use both face a quick power down without notice! The battery level icon is displayed in full, then goes to zero (box cut) in the space of perhaps 30 photos: -O! So I am questioning the accuracy of the electronic circuit "Infolithium" or perhaps the coupling of two batteries in the BG-E8 he interferes on the info sent to box? I do not know quite how Canon manages the thing or if it's different with original batteries (and almost 60 the room, I'm not especially warm to test) ...
But suddenly to avoid falling in the road, I am now obliged to systematically charge the battery every two story (although there is potentially more than 50% load).
So for now I can only put 3 stars for this battery.
