I have a DLC Covert II and a SG550. I've been running 8X lithium batteries in them, about $18 for 8 batteries. I checked my DLC about a month ago and the batteries were dead. I put new batteries and a fresh card in it. When I looked at the card when I got home, the DLC had created a folder on it and there was one pic in it. I figured it must have been a bad set of batteries.

Today, I checked my SG550. The batteries were (prematurely) dead in it and the remote control showed the card had one image on it. I put a new set of batteries in it and left the card in it. While I was changing batteries, I had the old dead ones in a grocery sack. Opening the pack of new ones, I fumbled one and it landed in the bag. Great, I narrowed it down to two batteries, but I didn't want to take a chance and put a dead one in with a fresh set, so I opened another pack of batteries. I got the digital volt meter out once I got home and figured out which was the fresh one.

So after changing batteries and leaving the card in the SG550, I went to move a ladder stand. I got to thinking while moving the stand, wondering if the card in the SG was the one that had been in the DLC when the batteries died. So I went back and swapped out the SD card and low and behold, the one image on it was from the DLC. Somehow, that SD card runs the batteries down. I've got it in my personal handheld camera now and I'll see how it works there. I bought the card new in July, never formatted it but I haven't formatted any of the SD cards I'm using.

So there are two wasted weeks.