No, unfortunately you cannot use the DP6/AC7 Brackets with the DP7-PRO. The DP7 monitors require 10v and the Canon Sony and Panasonic plates from the AC7 and DP6 can only output around 7v.
We do not currently sell batteries, but we hope to in the future.
We are unfortunately out of those for now and we are not sure when we will have more. We did find a compatible battery on amazon
It last for about 5 hours on the DP6 and about 2 1/2 hours on the DP1. You will need to find a mounting solution, like using velcro or gaffers tape, to attach it to your monitor.
ATTN: This battery has a voltage output selector please make sure to only use the 12v output option with your DP1 Monitor.
ATTN: This battery is large you may need to mount it away from your monitor if using the DP6