For the rest, this is the Chinese simply the plastoc m **** is fragile!
At the bases of the two batteries, it floats inside! (I 2 Official Battery Nikon)
, Causing false contacts!
I correct this problem by making paper shims they ballad more!
2nd worries; when our reflex switches for portrait shots and the trigger is used which is located on the grip, this causes another loose connection inside the nikon d5100 where the battery is usually installed . Because when you yours this grip on the side, to use its trigger that causes a very small gap and grip only supplies the device more!
I could also fix this problem by placing a wedge between the SLR and the grip on the right side (when you face in the photo)
In short!
The value for money is not present at all !!!! It should be sold between 10 and 15! No more ......