rcentros: AFAIK the LG V20 is the last flagship phone to have a removeable battery? It also has an sdcard slot and a headphone jack
It would be nice to have a DIY made ereader running Android. An option could be to use a speedreading flasher app of some kind with a small 1" display to flash single words at a time. There are eink displays for the Raspberry Pi Zero but they have very slow refresh rates AFAIK.
I would be happy with a very small screen ereader. I guess an apple watch would be an easier thing to use.
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