the amazon swindle is known for a month-long battery life, so a week is easily believable. but you're talking about how to solve a different problem
if batteries are an option, e-ink is a super-low-power option because it uses 100 milliwatts or maybe 10 milliwatts at a cellphone size, while a conventional backlit color lcd uses 1000. but to run off solar panels, indoors, my power budget for the whole zorzpad is 1 milliwatt, and the screen can only have a fraction of that
if batteries are an option, e-ink is a super-low-power option because it uses 100 milliwatts or maybe 10 milliwatts at a cellphone size, while a conventional backlit color lcd uses 1000. but to run off solar panels, indoors, my power budget for the whole zorzpad is 1 milliwatt, and the screen can only have a fraction of that