Last January I bought a Zoom H4 portable recorder ( to record HQ audio for the videos I shoot ), and have been very happy with it's performance. After reading a few posts on a Zoom H4 forum ( http://www.2090.org/zoom/bbs/viewforum.php?f=15 ) I built an external battery-pack for it. The results of battery-pack have been great. 28 hours of recording with one 48v phantom powered mic using just 6 alkaline C-cells, versus 2 hours of recording with the normal 2 AA batteries. ( the battery pack connects to the Zoom H4 using the external AC PS connector )
Now that I own a HV20, I am thinking of building a simillar battery-pack for it. It will be nice to be able to leave the HV20 screwed down on the tripod-head during a long shoot if I can find a way to power it with an external battery-pack.
I was able to buy an identical connector to the HV20 AC adapter for just $5 at a local electronics supply store. The HV20 AC unit puts out 8.4 volts at 1.5 amps. Any ideas on what type of battery I should look at to power the HV20 ?