I have a follow-on question: I remove the batteries when they die, which is every few weeks to months. Is there danger of a battery leak? Any idea how long it might take for that to happen?
Yes, there is a potential danger of battery leakage. I just had to throw away a multi-hundred-dollar pair of Bose noise-cancelling headphones because the battery leaked, rendering the on/off switch useless. That was painful. The problem is, you never know how long it's going to take for batteries to leak, since you don't know how long they sat around in the store before you purchased them.
But I have to say, if you're changing batteries every few weeks or months, the danger of undetected leakage is practically nil. When batteries start to leak, you can usually tell while they're still in the package.