I was typing in my CC info when I went back to read about battery life. This is meant as positive feedback: I won't be ordering a non-rechargeable device with 12 hours of recording for $100.
Imagine I fall asleep with it on my finger and accidentally press the button with my head. It's recording me snore for 3 hours, and 25% battery life gone.
Based on the description, this doesn't seem plausible. If the button is as clicky as it sounds, it would hurt your head/hand/both to do the thing you describe.