[GW-Booksense] Feature suggestion

[John Moore]

I was trying to record somethihn gon Sunday that was about 3 hours  
long, and I was using binaural microphones. Unknown to me, the  
BookSense's battery died about 2:30 into the recording. I think we  
need to have some knod of vibrator in the BookSense that will let  
someone know when the battery is running low while recording. Luckily,  
the recording that I made was saved to the SD card even when the  
battery died. I had left the BookSense on for a while before starting  
it, so that's why the battery ran down. This is still a concern I  
have. I'd love to see a future improvement to the hardware that would  
allow a vibrator to be put in the BookSense.