I bought one of the first Kindles and loaded it up with a hundred DRM-liberated ebooks and read it avidly. Since then, phones have gotten bigger screens with higher pixel density and longer battery life, and my Kindle now sits is a drawer unused. The best ebook reader is the one you have on you.
Higher battery life? The Kindle battery lasts much longer than a phone with the backlight off and in airplane mode.
But again, even if a phone could be used as an ereader, my point is that for most people it is likely not. Even for bibliophiles, they might not get so much reading done on a phone due to the distractions that phones bring.
These days, so long as the battery lasts all day (it does, using it as an ebook reader), that sufficient for a phone. Longer is better, but I always have a charger on me, a spare battery for emergencies when traveling, and a charging pad next to my bed at home.
> they might not get so much reading done on a phone due to the distractions that phones bring.
Short of notifications, there are no distractions on my phone when reading a book. No clock, no battery indicator, no nothing. If I really want to read, I can just go into DND mode, and even notifications have gone away.