I just got a Hassy H2 system and have been trying it out with my Aptus 65 back. I initially used the non charge batteries that came with the camera. However after about 10 shots the batteries died. So i charged the battery grip. The battery grip gives me about 10 to 20 shots and then the low battery magazine indicator comes on and the camera of course will not fire.
I have followed the instructions on charging. THe interesting thing is that when go to charge, the indicator light stating charge is complete comes on in a few minutes. I am not sure if you have any ideas but clearly something is not right. I am not sure if it is the grip, charger or camera.