I've been a photographer for over 40 years and have always used lithium batteries since they came out because rechargeable batteries have such a short life. Believe me, I've tried pretty much every type of battery known to man. As a drag race photographer, I shoot literally hundreds of pictures per day on race weekends, sometimes upwards of 2,500 shots at an event. When you're taking so many pictures, one after another, as fast as I do, and you're draining the batteries so fast you feel them getting hot in the camera, you KNOW you're putting them to their biggest test. I used to fire through a set of rechargeable batteries in less than a couple hours, about as fast as ANY brand of alkalines. When I discovered these lithium batteries and started using them in my cameras (I only used cameras that took AA batteries up until the last year or two and still have 4 or 5 that take AA's), I found that I could install a fresh set of Energizer ultimate lithium batteries on a Friday afternoon, and could shoot over 500 shots until they died. On a typical weekend with cars only running Saturday and Sunday, I can shoot all day Saturday and into about half the day on Sunday before the batteries died. NO OTHER BATTERY lasted that long, not even the square batteries that are used in my Canon DLSR's. So THIS is why I've been stuck on this battery for so long, in spite of it's cost.
I'm not going to read up on how batteries work. I'm 65 years old, and have used batteries in various things since I was a kid and NEVER, EVER had ANY of them die OVERNIGHT when something was turned OFF. It's obviously a short in the scanner. As a former auto mechanic who has worked with 12 volt car audio, security and pretty much everything else around cars and wiring, I know exactly what kills a car battery every few days even when the car isn't being driven... SOMETHING is causing a continuous draw. Could be as little as a light bulb staying on a a shorted wire, but it's something. Well, the same theory should hold true when it comes to AA batteries or any other size, SOMETHING has to be causing a draw. A battery doesn't just simply die overnight in something turned off, which brings me back to the original reason for my post: MINE ARE BEING DRAINED OVERNIGHT!!! Believe me or don't. I'm not making this stuff up. I have better things to do than get up at 6:00 on my day off and go online and post about something that is not true. If this thread can be closed or deleted it wouldn't bother me at all. Seems nobody believes me. In spite of people thinking you can't test a battery with a DMM, you CAN get a quick basic idea if a battery is up to charge or is low or dead. This isn't a car battery required to fire up a high compression engine, it's a simple AA battery used to power an electronic device. You can read all the thousands and thousands of online reviews about Energizer ultimate lithium batteries and I'd bet you anything you won't find anyone say they have one die overnight right out of the package when it's not even being used.