Originally Posted by elemenoP
This is why I tend to use a bigger font, 1.2em line spacing, and space between paragraphs. Because I value my eyes more than my ereader's battery.
I get good battery life from my K4s so it's not a problem. Two weeks is good enough for me. That's 3 to 6 hours a day reading. I use a bigger font size than most probably. I have gone down one size but my eyes are not the best. Out of the 8 sizes the Kindle offers I use size 4. I use normal line spacing, 1em indentations and a space between paragraphs.