The battery that enabled my car to start these past four and half years decided to die last Friday.  I personally don't blame him; car batteries are only supposed to last for two or three years, so his life was longer than expected and his work greatly appreciated.  My one complaint, however, is the way in which I was notified of his death:  My car didn't start, and a light on my dashboard alerted me to the fact that my battery had likely died.  Perhaps it's just me, but I'd much rather be notified before my battery dies than after, and I'm quite positive this would be possible with a little voltmeter circuit that simply suggested replacing your battery when the current battery's voltage dropped below a certain value.  This isn't rocket surgery. #travel