Yesterday when I was leaving work, I threw my pv's in my lunch box and went to wash my hands and then headed for my car. By the time I got in my car and opened my lunch box to grab my pv's for the way home, I smelled something burning. I guess when I put the pv's in my lunch box, the button was pushed in on my SD that had a lr306 and drip tip on it from Drew. I took the battery out and let everything cool down. I saw that the spring had collapsed some so stretched it back out, put in a new battery, dripped some liquid and gave it a try fully expecting the atty to be burnt out. It had seemed like it was getting clogged up during the day and needed cleaning. To my surprise, the LR306 worked like brand new. Not only did it not burn out, it cleaned itself. These attys are truly amazing and appear to be almost indestructible. Thanks Drew.