I don't believe so, but if it doesn't work consult Amazon.com on what to do.
no its a rare glass
You can change the battery on the Kindle1 (but you can only buy used K1's now) The Kindle2 has a rechargeable battery but you can't change it unless you take the device apart. Which is why in case you need the battery replaced, you need to send it to Amazon.
It could be that the batteries are getting old and need to be replaced.
because they run out of energy
Correct new and used batteries should not be mixed together due to reduced life span and other potential hazards from mixing. Batteries when being replaced should always be replaced with new batteries of the same size and brand if possible.
batteries need to be replaced
The batteries may not be in correctly.
Most of the material is recycled.
Sump pump batteries typically last around 3-5 years before needing to be replaced.
Amazon stocks replacement batteries (type BA1001) - see related link to their page.
Canon batteries typically last for about 2-3 years before needing to be replaced, depending on usage and charging habits.
Nikon batteries typically last around 2-3 years before needing to be replaced, depending on usage and charging habits.