I think I got lucky and got one of the models with improved battery (Onyx Boox Page). I’ve been reading the Trigun manga on it for over a week now and it’s only just getting to the point where I need to charge it finally.
But good point. Some of the older models might have worse battery life to consider. I only have a black and white model too. Color might use more battery.
Wait, tyromancy is real?! I thought CDPR were joking when they made an entire quest line out of it in the Witcher 3. I got a nice sword called the Emmentaler out of it and everything. Huh. TIL indeed. Thanks, OP. I never thought to Google it.