Looks like I'm late to this party, but it was actually my site that you saw the cameras starting at $150 at. landcameras.com
By conversion he means rechargeable. We use LiFePO4 batteries in all the cameras we sell. no more hacking apart the battery box to cram a bunch of AAA batteries in there. Using the existing mount and wiring we drop in place a battery and charge port.

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sorry for the spam/self promotion.. please delete if i've crossed the line.