I would expect most of them have had their batteries fail long ago. Especially if they were disused for an extended period of time.

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aaronscott 3 hours ago | parent [-]

I replaced the battery on my kindle 4 not that long ago. It had the best UX for extended reading when compared to newer kindles.

The biggest downside was not having a frontlit display.

I recently switch to an xteink x4, and found that several others in that community migrated from kindle 4s as well. So there are still some number of users in the world that value the device.

	▲	mh- 3 hours ago \| parent [-]
		I'm sure there are, I didn't mean to imply otherwise. It's just that the numbers are relatively small. I'm actually surprised that Amazon didn't offer to do a buyback of them.