well the thing is this thing has to stay connected to bluetooth the entire time, so that's part of the battery. The animations are also 3 frames or so... so maybe it's fine.
I think the ghosting comes from not explicitly setting bits. with the color e-ink screen you're probably resetting a lot of things, so even if ghosting is present, it's not very visible (especially after a lot of changes)
Looking at this closely though this _does_ remind me of something like the GBC screen. This might just be LCD.
