How long does the Anton Bauer pack last on the HM700? Thanks for the info.

If you are referring to the Dionic90, it is a 90W battery running a 22W camera so the math is 90 divided by 22 and the answer is; 4 hours plus! HOWEVER!!!!!!! please be aware there are other considerations. Are you powering any other accessories such as an onboard light, a wireless receiver, a harddrive or Nanoflash recorder that is drawing power from the camera battery. Is the battery fully topped of and at a 100% charge? Also don't forget you really don't want to run the battery 100% out of juice while it's on the camera, at least I don't.
So while there are some thing to consider the base camera running NO accessories on a 100% fully topped off Dionic90 battery will get approximately 4 hours and a few minutes IF you run the battery down to 0.

HTHs

Thank you. I am not familiar with the pack, so how much does a replacement battery cost when you need to put a fully charged back-up in?

If you're talking about recelling the battery I don't know. The Anton Bauer Dionic90s that I had went for hundreds of cycles and I never had a need to recell aone.

IF you are talking about another battery as in 2 or more Dionic90s they are just under $400.00 each and of course you need a charger. Those start around $525.00 for a single battery charger/power pak. Anton Bauer ain't cheap but what I have always loves about them is no matter what camera I was using (fullsized not small form factor) I could use the same batteries and IMO the customer service is 2nd to none.