NO, it doesnt work that way, the external pack is only used independently if the camera is running 4 d's- if you run 6 d on both.. they will drain concurrently, you will still get more life but you wont have a warning on you report it will go low and then dead. The camera needs to detect a voltage difference to use external first.
John:
Ok, that is helpful. And I'm not familiar with every camera configuration, but the way you explained, it sounds like "any" camera with 6-Ds will run concurrently with externals - not just the Js. Trying to decide if I'd rather have the two extra days of battery life, or the warning that externals need replacing? But I'll see with time.
Having an electronics background, that does bring up this idea. If I were to create two blank D-size spacers, that still completed the battery circuit, so that only 4 live batteries were internal in my Js, would that allow the external sensing? Thinking I could somehow add a conductor inside two of these
D-AA spacers and make that work. Or is there some other sensing within the 4-D cameras? At a buck a piece this might be an effective way to convert a 6-D to 4-D.
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Thanks so much for taking time to answer my questions. It was very helpful!
(PS: One last explanation/reason why I have such an embarrassing number of cameras. For years I had 6-8 corn feeders around the farm with a similar number of cameras. That created an enormous amount of images to sort through (which used up a lot of camera battery life), cost a lot of time and money to keep the feeders filled and maintained, and I wondered about disrupting the deers natural habits and patterns. So the money I previously spent on feeders and corn was applied to more (and more) cameras. This new set up seems to give a quality census of my wildlife, without all the extra pics of deer feeding in place for hours. Kentucky is further restricting feeding during certain periods of the year.
I am experimenting with a single gravity feeder, in the center of my property, feeding a mix of corn and protein pellets. A nearby friend had shown a dramatic improvement in antler growth feeding his deer protein, and I'm giving it a try for next years herd.)
Thanks again and cheers, Steve.