As much as I have my eneloops used in the battery grip, they did unfortunately limp during long exposures.
This battery here is tailor-made for the rather large current requirement of the 5D, in a now rather reality corresponding price.
Loaded it is up to 100 minutes, the full capacity should be reached after 3 practice laps.
And no one should grieve if he does not reach the promised 800 to 1,200 activations, because that wonderful display seduced to extensive images anschaun what then is at the expense of the number of allowances.
Very good battery, highly recommended, and why only 4 stars? The Price.