In July 2011, my husband gave me a Kindle Keyboard 3G, my first e-reader ever. In October 2012, it started malfunctioning, unable to stay charged and taking longer and longer to charge. Amazon’s service was nice, though, and they sent me a replacement because the power supply is guaranteed for 3 years (the rest just for one year).
A few months later, I noticed that Kindle #2 was taking longer and longer to charge, ~14 hours to get to green light status. So I notified Amazon and they sent me a replacement. But I was wary and checked Kindle #3 closely; it charged at normal speed, but was losing its charge within a few hours…
I received Kindle #4 today, i.e., third replacement. I spent yet another day transferring my library (I’m getting good at this, though, I have a workflow!) Hurray for the free open source library management software Calibre. Now, I admit that when I consider that I have many boxes’ worth of books on this little thing, it’s really neat. But when I consider that I own books that are nearly 200 years old and still “work”, I wonder how long this collection will last. No complaints at all about the Amazon support, but this seems ominous.
The Reef 
I’m on my fourth Kindle, as well, but mine were all owner/operator issues. The first I dropped, the second I stepped on, and the third my job jumped up and broke it.
In my defense, the first two were while I was recovering from major surgery… so I blame the meds.
Good luck with this one!
Recovering from major surgery is its own justification — including for the need to read!