I was on my cell phone when it chimed. At the time I thought it was someone trying to call me, but afterwards, there was no indication of a missed call and nothing new on my voice mail.
Wierd.
Then, maybe an hour or so later, it chimed again. By the time I could get to it, there was no indication of what happened to cause my cell phone to chime.
Then another hour or so later, it chimed yet again. This time I was able to get to it to see it flash the “Low Battery You Idiot! Recharge Me!” message for about two seconds before it went away.
While it's nice that the message will go away unattended, it's not nice that it goes away in two seconds. Five seconds, I might have caught it the second time (when I wasn't chatting away on the phone). Ten seconds might be better.